Training Regimen Research Articles

Abstract 4139170: Relationship between hemodynamics and oxygen consumption in hypertrophic cardiomyopathy during maximal stress testing

Background: Hypertrophic cardiomyopathy (HCM) is a global heart disease with great variability in disease severity, which can lead to significant impairment of exercise capacity. In healthy populations, oxygen consumption is related to cardiac output and arteriovenous oxygen difference. We sought to determine the relationship between hemodynamics (cardiac output and stroke volume) and oxygen consumption in HCM compared to healthy controls during maximal stress testing. Aims: To evaluate associations between the trajectories of hemodynamic function and oxygen consumption in HCM compared to healthy controls. Methods: Twenty individuals with HCM (51±15 years old, body mass index (BMI): 28±3 kg/m 2 , females, n=4) and 16 healthy controls (66±7 years old, 27±6 kg/m 2 , females, n=6) were included in the present study. Participants completed a maximal-graded stress test coupled with non-invasive hemodynamic bioreactance (cardiac output, stroke volume) and gas exchange (oxygen consumption, VO 2 ) measurements. Data were analyzed in quartiles (exercise only) and phases (rest, pre-pedalling, exercise and recovery) of the maximal-graded stress test. Results: In HCM, cardiac output declined in the fourth quartile of the exercise phase of the stress test (-0.39 L/min, p <0.001) whilst VO 2 increased (3.86 ml/kg/min, p <0.001). There was a significant difference in the gradient of cardiac output between HCM and controls in the final quartile of the test (-1.6 vs. 18.1 L/min, p<0.001). In coherence, stroke volume declined in the fourth quartile of the test (-18.4 ml, p <0.01) in response to increasing VO 2 in HCM. The rates of recovery were faster in HCM compared to the control group for VO 2 (-4.3 vs -2.6 mL/second, p<0.001), cardiac output (-0.03 vs -0.02 L/second, p<0.001), heart rate (-0.17 vs -0.10 beats/second, p<0.001), and stroke volume (-0.18 vs -0.07 L/second, p<0.001). Conclusions: In HCM, cardiac output declined during the later stages of maximal stress testing whereas in controls it continued to rise, indicating impaired maximal cardiac output responses to exercise. These findings have implications for exercise prescription and training regimens in HCM suggesting avoidance of maximal exercise levels.

Influence of Ajuga turkestanica and Asparagus racemosus Phytoextracts on the Effectiveness of Aerobic–Anaerobic Training Regime

In this work, we study the effect of Asparagus racemosus (EAR) and Ajuga turkestanica (EAT) dry extracts at a dose of 100 mg/kg in comparison with a Rhaponticum carthamoides extract (ERC) on the effectiveness of an aerobic–anaerobic training regimen in female mice in a triple-weight loaded exhaustive swim test with a 10% load of body weight, as well as on the level of malondialdehyde and catalase activity in blood hemolysate, cardiac and skeletal striated muscle tissue, and liver homogenate. The results obtained indicate a reduced severity of lipid peroxidation under the influence of dry EAR and EAT extracts, thus pointing to the antioxidant activity of the extracts. In the conducted triple-weight loaded exhaustive swim test, a statistically significant increase in the duration of swimming No. 3 and the test index was noted in both groups compared to the control. Therefore, it can be concluded that the studied extracts have a positive effect on the first-phase recovery processes.

Selected Specific Physical Training Program to Improve Jump Ability for Aerobic Gymnastic

Background and Aim: For aerobic gymnasts, a customized physical training regimen is essential because it increases muscle strength, improves performance quality, and lowers the risk of injury. It also cultivates priceless life lessons like self-control and tenacity, which are essential for athletes' overall growth. In the end, these kinds of programs are essential for optimizing physical ability, guaranteeing competitiveness, and developing well-rounded people in the demanding world of aerobic gymnastics. This research objective was to select specific physical training programs on Jumping ability and to compare the effect of selected specific physical training programs within the experimental group on jumping ability between pretest, after week 4, and posttest. Materials and Methods: The research was a quasi-experimental design, The Population was the 23 aerobic gymnastic players of Qingyuan City No. 3 Middle School in Guangdong Province, in 2023, aged 16-17 years. The sample was 23 aerobic gymnastic players, a purposive sampling method. They examined jump ability in the Straddle jump test, 360-degree-jump test, Split leap test, and power strength such as the Vertical jump test, Standing long jump test, and Wall squat test with pretest, after week 4 and posttest. The selected specific physical training programs were conducted for an eight-week duration of training, three days each week (Monday Wednesday Friday) and 1.30 hours per time. Data were collected and analyzed for mean and standard deviation. Differences were compared using one-way analysis of variance (ANOVA) with repeated measures. Bonferroni performed a post hoc pairwise comparison. The significance level is set to .05. Result: (1) The mean and standard deviation of jump ability and, strength and power which divide into the pretest, after week 4 and the posttest were followed by the Straddle jump was 4.61 ± 1.31, 6.13 ± 1.22 and 8.00 ± 0.74 score, 360-degree-jump was 5.57 ± 0.79, 6.96 ± 0.64 and 8.39 ± 0.58 score, Split leap test was 5.30 ± 0.76, 6.65 ± 0.71 and 8.26 ± 0.62 score, Vertical jump was 256.91 ± 23.50, 262.91 ± 24.55 and 269.09 ± 25.53 cm., Standing long jump was 204.83 ± 31.02, 209.43 ± 31.81 and 214.43 ± 31.82 cm. and Wall squat was 54.04 ± 10.44, 59.61 ± 11.02 and 66.04 ± 11.37 sec respectively. (2) The mean comparison of aerobic gymnastic jump ability and strength and power with the pre-test after week 4 and post-test found that all pairwise post hoc, pretest-after week 4, pretest-posttest, and after week 4- post-test were significant differences (*p<.05). Conclusion: The special physical training program can improve the jumping ability of aerobic gymnastic players. This study concludes the most effective methods to improve the jumping ability of aerobics athletes, discusses and corrects the deficiencies in the training process, bids farewell to the boring traditional exercises, and expands the application of the training contents, it provides a basis for teachers to formulate training programs.

Development of a 3X3 Basketball Training Program Based on the Game Analysis

Background and Aim: The classic game of five-a-side basketball, which was first introduced as an official competition at the 32nd Olympic Games, gave rise to the new sport of 3x3 basketball. At the 32nd Olympic Games, China's women's 3x3 basketball team made history by winning the bronze medal and demonstrating exceptional competitiveness. The world's top teams still differ from one another, though. In addition, 3x3 basketball will become more well-known and appreciated in China. As much as we should celebrate the outcome, we also need to get ready for the Chinese team's next matchup against the best teams in the world. This article's primary research objective is to develop a three-woman basketball training regimen based on the analysis's findings. The research objectives are: 1) To study the results of the analysis of techniques, tactics, and quality of three women's basketball teams. of China in the 32nd Olympic Games. 2) To create a basketball training design based on the analysis results.3) To find the effectiveness of a 3-players basketball training plan created from the results of the game analysis Materials and Methods: This study adopts literature research, investigation, data analysis, logic analysis, and experiment methods. The sample included Chinese basketball players and 32 athletes from seven countries, including Romania, Russia, Italy, Japan, the United States, Mongolia, and France. In the experiment, 15 women's basketball athletes from Zhaoqing College were randomly selected for targeted training, and comprehensive tests were carried out before and after training to evaluate the effectiveness of the training plan. Result: The research results found that 1) Obtain a 3-person basketball training exercise from the game analysis results. 2) Obtain an effective 3-person basketball practice according to the set criteria of 80/80 with an efficiency of 85.75/95.75. It shows that this training plan is very effective for improving the performance of athletes. Conclusion: The 3X3 basketball training method based on the analysis of the game data is very effective for improving the level and performance of the athletes.

A Wushu Leg Gesture Recognition Algorithm Based on Random Forest and Bone Feature Extraction (RF-SFE)

Addressing the challenges of complex movement trajectories and rapid action changes in martial arts performances, this study introduces a novel posture recognition algorithm based on Random Forest and Skeletal Feature Extraction (RF-SFE) for martial arts leg movements. Unlike traditional posture recognition methods that struggle with accuracy, RF-SFE aims to provide intelligent analysis of training postures to assist practitioners in efficient training. The algorithm initially employs advanced skeletal feature extraction techniques to identify and articulate the relative positions and movements specific to martial arts. These extracted spatial features enhance the flexibility in modeling the unique dynamics of martial arts. Subsequently, Random Forest classification is utilized to categorize different leg movements, leveraging its strength in handling high-dimensional data and providing robust classification. Comparative experiments on diverse martial arts posture datasets demonstrate a significant improvement in recognition rates over baseline methods. This validates the effectiveness of the RF-SFE method in recognizing martial arts postures, offering scientific guidance for practitioners’ training regimens.

Limiting Access to Resistance Training Equipment During the Off-Season: The Impact on Collegiate Pitching Metrics.

Gdovin, JR, Hogan, B, and Williams, CC. Limiting access to resistance training equipment during the off-season: the impact on collegiate pitching metrics. J Strength Cond Res XX(X): 000-000, 2024-Resistance training has been shown to improve overhead throwing velocity, but it is unknown as to how limiting access to a strength and conditioning facility affects a baseball pitcher's readiness for the spring season. Therefore, the purpose of this study was to examine the influence of an individualized pitching program on pitching metrics during an 8-week fall season in collegiate baseball pitchers without a simultaneous structured strength training program. Twelve National Collegiate Athletic Association Division-I baseball pitchers completed the study and wore a PULSE Throw Workload Monitor to track peak arm slot angle, peak arm velocity, and peak elbow varus torque, while a radar gun measured ball velocity. An 8-week pitching program had subjects throw 30 and 50 maximum effort pitches in the first and eighth week, respectively, while workload increased by 5 maximum effort pitches every 2 weeks. Paired samples t-tests were conducted to compare variables of interest before and after an 8-week fall season with an alpha level set at 0.05. There was no significant difference in peak arm slot angle, peak arm velocity, and peak elbow varus torque (p > 0.05); however, there was a significant decrease in ball velocity (p < 0.001). These data indicate that 8-week pitching programs, not coupled with a resistance training regimen, negatively affect a pitcher's ball velocity. Sport coaches and practitioners should thus make accommodations to access the necessary equipment for a pitching and strength training program to be implemented simultaneously to ensure that pitchers are prepared to perform at an optimal level during the spring season.

Carbon monoxide supplementation: evaluating its potential to enhance altitude training effects and cycling performance in elite athletes.

Altitude training is a cornerstone for endurance athletes for improving blood variables and performance, with optimal effects observed at ∼2,300-2,500 meters above sea level (m.a.s.l.). However, elite cyclists face challenges such as limited access to such altitudes, inadequate training facilities, and high expenses. To address these issues, a novel method involving daily exposure to carbon monoxide (CO) has been proposed to amplify altitude training adaptations at suboptimal altitudes. Thirty-one male cyclists were assigned to three groups: Live-High Train-High with CO inhalation (LHTHCO), Live-High Train-High (LHTH), and Live-Low Train-Low (LLTL). The LHTHCO group underwent CO inhalation twice daily in the afternoon/evening to elevate carboxyhemoglobin concentration to ∼10%. Hematological variables, in vivo muscle oxidative capacity, and physiological indicators of cycling performance were assessed before and after a 3-week altitude training camp at 2,100 m.a.s.l. LHTHCO demonstrated a larger increase in hemoglobin mass (Hbmass) compared to both LHTH and LLTL. Although there were no statistical differences between LHTHCO and LHTH in submaximal and maximal performance measures, LHTHCO displayed greater improvements in 1-min maximal power output during incremental testing (Wmax), power output at lactate threshold, and maximal oxygen consumption (V̇o2max) compared to LLTL. LHTH demonstrated a larger improvement than LLTL in Wmax and V̇o2max, with no group differences in Hbmass or submaximal measures. Muscle oxidative capacity did not differ between groups. These findings suggest that combining moderate-altitude training with daily CO inhalation promotes hematological adaptations more effectively than moderate altitude alone and enhances cycling performance metrics in cyclists more than sea-level training.NEW & NOTEWORTHY Three weeks of training at moderate altitude with exposure to low doses of CO can significantly enhance hematological adaptations in elite cyclists compared to moderate-altitude training alone. Cycling performance determinants improved more with CO inhalation at moderate altitude compared to sea-level training, whereas there were no differences in submaximal and maximal performance measures compared to moderate-altitude training alone. This study highlights the potential of CO supplementation as an effective adjunct to altitude training regimens.

Enhancing Mandarin Tone and Vowel Recognition in Cochlear Implant Simulation through Combining Task Practice

Purpose: Mandarin tone recognition with cochlear implant simulation can be enhanced via targeted auditory training. However, such training generally does not transfer to different tasks, even when they share the same stimuli. As such, this study investigated whether combined Mandarin tone and vowel recognition training leads to greater improvements in Mandarin tone, vowel, and sentence recognition compared to tone- or vowel- only training.Methods: Twenty-nine native Mandarin-speaking young adults with normal hearing were randomly assigned to one of three training regimens: Tone-Only, Vowel-Only, Tone-Vowel. Mandarin tone, vowel, and sentence recognition were tested before and after training.Results: Tone-Only training improved Mandarin tone recognition but not vowel recognition, while Vowel-Only training improved Mandarin vowel recognition but not tone recognition. The combined Tone-Vowel training improved both tone and vowel recognition. ToneVowel training also led to improvements in Mandarin sentence recognition, although these gains were not significantly greater than those observed in Tone-Only or Vowel-Only groups.Conclusion: These findings suggest that within an equivalent amount of training, combined tone and vowel recognition training enhances both tone and vowel recognition, while tone- or vowel-only training improves the performance in the targeted task alone. Combined tone and vowel recognition may be necessary to achieve improvements in Mandarin tone, vowel, and sentence recognition.

Effects of resistance and strength training on serum phosphorus levels in male footballers: implications for physical educators and sports trainers

Background and Study Aim. Sports performance and overall health of athletes are highly dependent on various physiological markers. Among these, blood biochemistry is of great importance and should be carefully considered in athletes' training regimens. However, the effect of strength and resistance training on serum phosphorus levels still requires further clarification and more effective solutions. The aim of this study was to determine the effect of strength and resistance training on serum phosphorus levels in elite male soccer players. Material and Methods. A sample of 90 volunteers was recruited from football athletes in the Peshawar division. Thirty participants were selected from each of the under-16, under-19, and under-23 age groups. They were divided into three groups: the Resistance Training Group (RTG), the Strength Training Group (STG), and the Control Group (CG). Each group consisted of 30 participants, with 10 from each age category. Phosphorus levels and anthropometric measurements (height, weight, BMI, waist circumference, hip circumference, and waist-to-hip ratio (WHR)) were assessed before and after a 12-week strength and resistance training intervention. Analysis of Variance (ANOVA) and paired sample t-tests were used to evaluate changes over time. Results. Significant improvements were observed in serum phosphorus levels in the Resistance Training Group (4.77±0.258 vs. 3.66±0.207, P&lt;0.001) and in the Strength Training Group (4.31±0.304 vs. 3.66±0.209, P&lt;0.001). A 12-week regimen of strength and resistance training significantly improved serum phosphorus levels among the participants. Analysis of variance indicated that both strength and resistance training significantly affected serum phosphorus levels after 12 weeks of intervention. Tukey’s HSD test revealed that the effects of resistance training were more pronounced than those of strength training. Conclusions. This study highlights the importance of incorporating both strength and resistance training in athletic programs. These training approaches are crucial for optimizing physical health and performance. The findings underscore the need for educators and trainers to adapt and refine their methods to maximize the benefits of these interventions. By doing so, they can enhance the effectiveness of training regimens and contribute to the overall well-being of athletes.

OPTIMISING EFFORT CAPACITY IN TRIATHLON

Background. My personal triathlon practice inspired the creation of a specialized training regimen to improve triathlon training in Romania. This program aims to enhance performance, well-being, and injury prevention for athletes. At the INTERDISCIPLINARY RESEARCH CENTRE (CCI) “Dr. Alexandru Partheniu” of UNEFS, we used AEROSCAN technology to assess exercise capacity, measuring heart and breathing rates with the Bruce Protocol for precise physiological monitoring. Objectives. This research demonstrates that tailored training cycles for swimming, cycling, and running can significantly enhance triathlon performance. The goal was to create a customizable, comprehensive training program to maximize the overall training process and provide a scientific foundation for triathlon training in Romania. This research aims to demonstrate that tailored training cycles can significantly enhance triathlon performance. Methods. We used observation, experimental, statistical-mathematical, and bibliographic study methods to interpret the experiment's outcomes. The bibliographic study provided the theoretical basis, while observation and experimental methods enabled real-time data collection. Statistical analysis was crucial for interpreting the data. Results. Using AEROSCAN and the Polar system, we evaluated exercise capacity and tracked heart rate. The Bruce protocol was applied for both initial and final tests. The data showed significant improvements in endurance, speed, and overall performance, supported by statistical analysis, after implementing the customized training program. Conclusion: Our research indicates that tailored athletic training regimens for each triathlon discipline can significantly enhance performance and promote athletes' health and longevity. The results highlight the importance of individualized training plans and suggest potential improvements in Romanian triathlon training practices. Individualized training programs lead to notable improvements in performance and athlete well-being.

Enhancing respiratory function through Yoga and Pilates in women aged 45-50

Background and Study Aim. Respiratory function in women aged 45-50 often declines due to natural physiological changes associated with aging. These changes include reduced lung elasticity, decreased diaphragm efficiency, and a general reduction in physical activity. The purpose of this study was to assess the impact of a combined yoga and Pilates program on respiratory function in women aged 45-50. Material and Methods. The study involved 38 women with an average age of 47.7 ± 2.5 years. A pedagogical experiment was conducted over six months. The experimental group (n=19) participated in a training regimen focused on improving respiratory function through a combination of yoga and Pilates. The control group (n=19) followed a yoga-based training program. Both groups completed an equal number of sessions—72 in total. The external respiratory function of the participants was assessed using spirometry at two key points: at the beginning of the study and after six months. Results. The comparison of respiratory function indicators between the experimental and control groups after 6 months of training revealed significant differences across most parameters. The actual value of Vital Capacity was significantly greater in the experimental group compared to the control group by 0.17 L (p &lt; 0.01), forced vital capacity by 0.30 L (p &lt; 0.01), forced expiratory volume by 0.19 L (p &lt; 0.01), peak expiratory flow by 0.23 L/sec (p &lt; 0.01), maximum expiratory flow at 25% of Forced Vital Capacity by 0.96 L/sec (p &lt; 0.001), maximum expiratory flow at 50% of Forced Vital Capacity by 0.59 L/sec (p &lt; 0.001), expiratory reserve volume by 0.47 L (p &lt; 0.001), and maximal voluntary ventilation by 17.00 L/min (p &lt; 0.001). Conclusions. The combined Yoga and Pilates training regimen was more effective in improving external respiratory function than Yoga alone. This result highlights the benefits of an integrated approach to respiratory health for women aged 45-50. The study demonstrates the potential advantages of combining different types of exercise to counteract age-related declines in respiratory function. Such programs could play a significant role in promoting overall well-being in this age group.

The influence of sexual dimorphism on the manifestation of coordination abilities of volleyball players aged 15-17

Background and Study Aim. Sexual dimorphism plays a crucial role in the design of training programs for athletes. Therefore, understanding the influence of sexual dimorphism on various abilities is essential for optimizing training regimens. The aim of this study is to determine the influence of sexual dimorphism on the manifestation of coordination abilities in young volleyball players aged 15–17. Material and Methods. Volleyball players aged 15–17 years participated in the study (n=92, training experience – 5–7 years). Fifty of them were girls, and forty-two were boys. Motor tests were used to determine the level of coordination preparedness of the volleyball players. The study assessed kinesthetic differentiation, spatial orientation, reaction, coupling, binding of movements, and balance skills. Statistical data processing was carried out using Microsoft Excel and SPSS programs. Results. For most of the compared indicators of coordination abilities, there was no significant difference between male and female volleyball players aged 15–17 (p&gt;0.05). In the “Shuttle run with back forward” test, which determined the ability of volleyball players to quickly rebuild motor activity, boys outperformed girls by 5.6% (p&lt;0.05). In the “Sprint test with the given rhythm”, boys significantly outperformed girls by 16.6% (p&lt;0.001). However, control exercises that determined the relative indicators of the above qualities did not show a significant difference. No significant differences (p&gt;0.05) were found in the indicators that characterized the subjects' ability to demonstrate balance in both groups. Girls outperformed boys by 4.2% in terms of sagittal displacement of the center of mass. Comparison of the magnitude of latent periods of simple and complex visual-motor reaction by groups did not reveal significant differences among boys and girls. Conclusions. The results of the study indicate the need to implement targeted training programs to address and mitigate gender differences in coordination abilities among young volleyball players. These programs should focus on enhancing specific coordination skills. This approach ensures balanced development. Purposeful sports training can help overcome inherent physiological differences. By doing so, it leverages the benefits of tailored training to promote equality in athletic performance.

The differences effects of lunges vs. squats exercise programs on the swimming speed 50-meters butterfly style: a quasi-experimental study

Objective: This study aims to investigate the impact of lunges vs. squats exercise on the swimming speed of the 50-meter butterfly stroke among athletes aged 10-13 in KU III and IV categories. Approach: An experimental method employing a two-group pre-test and post-test design was utilized. The study population consisted of athletes affiliated with the SeaRia Aquatic swimming association. Purposive sampling was employed, selecting male swimmers aged 10-13 who were members of the Searia Aquatic swimming club and willing to participate in training during the study. Twenty athletes met the inclusion criteria. The speed test was conducted using the 50-meter butterfly stroke. Statistical data analysis was performed using t-test with SPSS 25 software, employing a significance level of 0.05. Results: The analysis revealed significant effects: (1) lunge training demonstrated a significant improvement in the swimming speed of the 50-meter butterfly stroke among athletes aged 10-13 at the SeaRia Aquatic swimming association (t-count = 6.046, t-table = 2.23, P &lt; 0.05); (2) similarly, squat training led to a significant enhancement in the swimming speed of the 50-meter butterfly stroke among the same age group at the SeaRia Aquatic swimming association (t-count = 6.086, t-table = 2.23, P &lt; 0.05). Collectively, both lunges and squats positively influenced swimming speed in the 50-meter butterfly stroke among athletes aged 10-13 affiliated with the Searia Aquatic swimming association. Conclusion: This study underscores the beneficial effects of incorporating lunges vs. squats into training regimens for young athletes aiming to improve their swimming performance, particularly in the butterfly stroke. This study found that squats are more effective than lunges in improving performance in the butterfly swimming stroke. These findings offer valuable insights for coaches, trainers, and athletes interested in enhancing their competitive edge in swimming, particularly in butterfly style.

Predicting Shot Accuracy in Badminton Using Quiet Eye Metrics and Neural Networks

This paper presents a novel approach to predicting shot accuracy in badminton by analyzing Quiet Eye (QE) metrics such as QE duration, fixation points, and gaze dynamics. We develop a neural network model that combines visual data from eye-tracking devices with biomechanical data such as body posture and shuttlecock trajectory. Our model is designed to predict shot accuracy, providing insights into the role of QE in performance. The study involved 30 badminton players of varying skill levels from the Chinese Swimming Club in Singapore. Using a combination of eye-tracking technology and motion capture systems, we collected data on QE metrics and biomechanical factors during a series of badminton shots for a total of 750. Key results include: (1) The neural network model achieved 85% accuracy in predicting shot outcomes, demonstrating the potential of integrating QE metrics with biomechanical data. (2) QE duration and onset were identified as the most significant predictors of shot accuracy, followed by racket speed and wrist angle at impact. (3) Elite players exhibited significantly longer QE durations (M = 289.5 ms) compared to intermediate (M = 213.7 ms) and novice players (M = 168.3 ms). (4) A strong positive correlation (r = 0.72) was found between QE duration and shot accuracy across all skill levels. These findings have important implications for badminton training and performance evaluation. The study suggests that QE-based training programs could significantly enhance players’ shot accuracy. Furthermore, the predictive model developed in this study offers a framework for real-time performance analysis and personalized training regimens in badminton. By bridging cognitive neuroscience and sports performance through advanced data analytics, this research paves the way for more sophisticated, individualized training approaches in badminton and potentially other fast-paced sports. Future research directions include exploring the temporal dynamics of QE during matches and developing real-time feedback systems based on QE metrics.

Multi-receptive-field physics-informed neural network for complex electromagnetic media

Acquiring the electromagnetic response of intricate media at the nanoscale constitutes a pivotal phase in the design intricacies of nanophotonic apparatuses. Conventional numerical algorithms often necessitate intricate and specialized treatments to accommodate the unique properties of the medium, coupled with substantial computational time and resource demands. In recent years, the advent of deep learning technology has heralded numerous advancements in the domain of computational electromagnetics, albeit with a scarcity of solvers tailored for versatile complex media. Consequently, this study introduces an innovative multi-receptive-field physics-informed neural network (MRF-PINN) designed to tackle nano optical scattering predicaments inherent in media exhibiting dispersion, inhomogeneity, anisotropy, nonlinearity, and chirality. This framework adeptly captures electromagnetic perturbations surrounding scatterers via variable-scale receptive fields, thereby enhancing prediction precision. Within the training regimen, a scale balancing algorithm is proposed to expedite network convergence. Empirical findings demonstrate that a fully trained MRF-PINN proficiently reconstructs electromagnetic field distributions within complex nanomaterials within a mere tens of milliseconds of inference time. Such quasi real-time capabilities herald a novel approach to supplant the arduous forward calculation processes inherent in nanomaterial design workflows.

Intermittent Exercise and Cigarette Smoke Extract-Induced Pulmonary Tensegrity Dysfunction; Monitoring Elastin, Matrix Metalloproteinase-12, Transforming Growth Factor-beta 1

Background: Cigarette smoke causes inflammation of the alveoli, leading to airflow restriction and potentially irreversible changes in lung architecture, including pulmonary emphysema. This study investigates the effects of a six-week aerobic interval training regimen on elastin activity in a rat model of cigarette smoke-induced COPD (CS-COPD). Objectives: Specifically, we observe the variables matrix metalloproteinase-12 (MMP12) and transforming growth factor-beta (TGF-β1). Methods: Twenty male Wistar rats, aged eight weeks, were divided into four groups (n = 5 per group): Control, aerobic interval training (Exe), cigarette smoke extract (CSE), and CSE + Exe. The aerobic interval training (Exe) was performed for 49 min/day, five days per week for six weeks in interval form. The CSE group received an intraperitoneal (IP) injection of 150 µL of cigarette smoke extract, one day per week for six weeks. Results: The CSE and CSE + Exe groups showed a significant decrease in elastin gene expression in lung tissue compared to the healthy control group (P = 0.0002 and P = 0.0057, respectively) and the Exe group (P = 0.0002 and P = 0.0042, respectively). Additionally, the CSE group exhibited a significant increase in lung MMP12 gene expression compared to the healthy control and Exe groups (P = 0.0008 and P = 0.0013, respectively). Notably, the CSE + Exe group showed a significant decrease in MMP12 gene expression in lung tissue compared to the CSE group (P = 0.0015). Furthermore, the CSE and CSE + Exe groups demonstrated a significant increase in TGFB1 gene expression in lung tissue compared to the healthy control group (P &lt; 0.0001 and P = 0.0022, respectively) and the Exe group (P &lt; 0.0001 for both). Conclusions: Our findings indicate that the group exposed to cigarette smoke experienced a significant decrease in elastin levels, accompanied by an increase in MMP12 and TGF-β1 expression. Although aerobic interval training provided some protection against the detrimental effects of cigarette smoke exposure, it was not sufficient to fully reverse the harmful impacts of the disease.

Influence of circadian preference, sleep inertia and their interaction on marathon completion time: A retrospective, cross-sectional investigation of a large mass-participation city marathon.

Burgeoning interest in marathons necessitates an understanding of performance determinants. Research has highlighted the importance of diet, training and sleep, yet relations of circadian preference and sleep inertia with marathon performance remain largely unexplored. Because marathons generally start early-to-mid morning, these characteristics may have relevant impact. This study investigates relationships of circadian preference, sleep inertia and their interaction with marathon completion time. Consenting participants in a 2016 large mass-participation city marathon completed self-report questionnaires capturing circadian preference and sleep inertia, along with demographics and other characteristics. Circadian preference and sleep inertia were described across subgroups. Analyses examined the associations and interactions of circadian preference and sleep inertia with marathon completion times, with adjusted analyses accounting for age, sex and sleep health. Participants were marathon finishers (n = 936; 64.5% male; 66.3% young-adults), with a majority reporting morningness tendencies (60.8%). Results supported a linear association between increasing eveningness preference with slower marathon times (p = 0.003; padjusted = 0.002), while some support was provided for a linear relationship between greater sleep inertia and slower marathon times (p = 0.04; padjusted = 0.07). A significant interaction was observed (p = 0.02; padjusted = 0.01), with the directionality suggesting that the circadian preference relationship weakened when sleep inertia severity increased, and vice-versa. Our results suggest deleterious associations of increasing eveningness preference and greater sleep inertia with marathon completion time. These features may aid identifying marathoners who could be at a disadvantage, while also serving as modifiable targets for personalized training regimens preceding competition.

Development of professional skills in kickboxing athletes using virtual reality technologies

Ukrainian sports are currently facing numerous problems due to the hostile military operations by the Russian Federation, leading to the emigration of gifted athletes from the nation. Considering these challenges, the search for novel ways to support and enhance athletes throughout their careers has become critically important. Cutting-edge technologies, especially virtual reality (VR), are being proposed as a potent means to enhance professional training. They facilitate the fusion of traditional and innovative methods, ensuring that athletic training evolves to meet contemporary demands. This strategy adjusts the requirements of athletes across the spectrum, from beginners to professionals, as well as mentors and sports entities eager to incorporate unconventional technologies into their training regimen. Employing immersive VR settings enables the replication of authentic competitive scenarios and training intensities. It offers the capability to monitor biometric data, evaluating the athletes' resilience to stress, their focus, and their strategic expertise. Anticipated outcomes of this holistic approach include enhanced training session productivity, reinforced mental strength in competitors during events, and expedited recuperation from injuries. The introduction and application of VR technology in sports training signifies a leap towards revitalizing traditional training techniques, ensuring they are modular and adaptable. This facilitates seamless integration into a range of sports disciplines and alignment with diverse training schemes, enhancing Ukraine's global sports standing and positioning the nation as a pioneer in athlete training innovation. In this study, we explored the incorporation of VR technology in kickboxing, specifically targeting the 10–12-year age bracket. At this developmental stage, children are particularly receptive to new experiences and stimuli, making such a technologically enriched environment a powerful tool to boost training enthusiasm. Virtual reality holds the promise of breaking the routine of standard training practices, rendering them more captivating and interactive, which is crucial for attracting young participants.

Post-Lunch Napping as a Strategy to Enhance Physiological Performance and Cognitive Function in Elite Volleyball Players

Background and Objectives: Volleyball demands high levels of anaerobic strength, flexibility, agility, and mental focus. Adequate sleep has been shown to enhance athletic performance and cognitive function. This study investigates the impact of post-lunch naps of varying durations (25 and 45 min) on the physiological performance and cognitive focus of elite volleyball players. Materials and Methods: Sixteen elite volleyball players (8 male, 8 female) with at least 7 years of competitive experience participated in a randomized crossover study. They underwent three experimental conditions: no nap (No-Nap), a 25-min nap (N25), and a 45-min nap (N45). Physical performance was measured through counter-movement jumps (CMJ) and volleyball agility tests, while cognitive function was assessed using the D2 attention test. Statistical analysis included repeated measures ANOVA to examine the differences between nap conditions and gender-specific responses. Results: Significant improvements in both physical performance and cognitive focus were observed in the N25 and N45 conditions compared to the No-Nap condition (indicating the effectiveness of short naps in enhancing both physical and mental performance). Males outperformed females in most physical metrics, while females scored higher on the D2 attention test (suggesting possible gender-specific responses to napping). The 25-min nap showed slightly better results in terms of sleep quality and subsequent performance (confirming that shorter naps may be more beneficial). Conclusions: Post-lunch naps, especially of 25 or 45 min, enhance both physiological and cognitive performance in elite volleyball players. These findings suggest that integrating short naps into athletes’ training regimens can improve performance and focus, with potential gender-specific benefits. Further research is needed to explore long-term effects and variations across other sports.

The Relationship of Preseason Upper Extremity Function, Pain and Training on Normalized DIII Collegiate Swimming Performance.

Shoulder injuries comprise the largest proportion of swimming injuries and there is a large percentage of swimmers participating with pain. Therefore, it is assumed that shoulder pain decreases performance, but studies have not compared collegiate swimmers' performance with and without pain. 1) Determine if individual swimmer's shoulder pain and function are associated with a change in normalized swimming performance over a season.2) Determine if differences in normalized swimming performance exist among 3 collegiate teams. 3) Qualitatively describe and compare team's training regimes. Cross sectional study. Swimmers completed pre-(T1) and post-season (T2) surveys including pain ratings and shoulder function using the Kerlan-Jobe Orthopaedic Clinic (KJOC) shoulder and elbow questionnaire. Swimming times were obtained from published meet results. Coaches reported training programs through interviews and tracking logs. 52 NCAA Division III swimmers from 3 teams. Stepwise linear regression was used to determine if pain and function related to performance. Team demographics and normalized swimming performance (reduction in time per lap from season's beginning to end) were compared with ANOVAs with post-hoc tests. Initial KJOC scores, but not pain, related to individual swimming performance. Differences in team performance were found (p=0.006), with Team 3 having greatest reduction in time (1.01 sec/lap), lower percentage of females, a more experienced coach and a periodization schedule with large increases and decreases in yardage. There was a main effect (p=0.043) for baseline demographics with Team 3's swimmers being taller and having longer competitive experience. The initial KJOC score predicting swimming performance improvement demonstrates the need for athletic trainers to prioritize enhancement of pre-season function. Endurance training induced hypoalgesia and motivation may explain the lack of effect of shoulder pain on performance. Further research is needed to elucidate optimal periodization and dryland training.