Jump Test Research Articles

Utilizing Strain Rate Jump Testing to Predict Incremental Spin Formability of Al Alloys Sensitive to Portevin–Le Chatelier Instabilities

Utilizing Strain Rate Jump Testing to Predict Incremental Spin Formability of Al Alloys Sensitive to Portevin–Le Chatelier Instabilities

The correlation between students' physical ability and their academic performance

Physical fitness is often linked to various cognitive and academic benefits, with numerous studies suggesting that physical ability may influence students' learning outcomes. Understanding this relationship is crucial for promoting holistic education that balances physical and intellectual development. This study investigates the correlation between students' physical ability and academic performance using a quantitative approach and a descriptive research design. The sample was selected through purposive sampling. Data collection involved physical ability tests and academic performance scores obtained from students' reportbooks. The physical ability tests included the Vertical Jump, Sprint, Ruler Drop Test, Zigzag Run Test, Hand Wall Toss Test, and Pacer Test. Data were analyzed using correlation formulas to determine the relationship between each physical ability measure and academic performance. The results revealed varying degrees of correlation: the Vertical Jump test showed a direct correlation (r = 0.0026), the Sprint test indicated no significant correlation (r = -0.065), the Ruler Drop test demonstrated an indirect correlation (r = -0.013), the Hand Wall Toss test indicated a direct correlation (r = 0.009), the Zigzag Run test suggested an indirect correlation (r = -0.062), and the Pacer test showed an indirect correlation (r = -0.008). These findings suggest that some physical abilities may have a small direct or indirect relationship with academic performance, while others show no significant correlation. The findings suggest that creating well-rounded athletes requires attention to intellectual development alongside physical training, ensuring a balanced approach to nurturing future champions.

The "11 to Perf Score", a Test for Professional Players Returning to Soccer After Anterior Cruciate Ligament Reconstruction.

Rupture of the anterior cruciate ligament (ACL) is common among soccer players. Although there are no strict recommendations for the return to sport, more and more practitioners are having their patients perform isokinetic and even composite tests. However, these tests have not yet been shown to be predictive of re-injury, and are not specific to professional footballers. Objectives: The "11 to Perf" is a test designed to help professional footballers return to sport after ACL reconstruction. Its originality lies in its integration of soccer practice with specific tests. The aim of this article is to present the "11 to Perf" evaluation method. Methods: A prospective cohort study was conducted at the Centre National du Football (FIFA center) in Clairefontaine, including professional footballers who have undergone anterior cruciate ligament surgery and rehabilitation. Tests include clinical assessments, jumping, agility, psychological and isokinetic tests and match simulation. Conclusions: The "11 to Perf" is a composite test designed to assess the return to sport of professional footballers after ACL reconstruction. Its predictive capacity for recurrence should be assessed in the future.

Potential Importance of Maximal Upper Body Strength-Generating Qualities and Upper Body Strength Training for Performance of High-Intensity Running and Jumping Actions: A Scoping Review.

To investigate the influence of upper body (UB) strength qualities and UB strength training on the performance of high-intensity running and jumping actions and to identify gaps and recommendations for future research. A systematic search using the PRISMA Scoping Review protocol was conducted in February 2024 using PubMed, Scopus, and ICTRP. Studies eligible for inclusion were those that reported associations between UB or trunk maximal strength qualities (e.g., absolute strength, forces, power) and high-intensity running or jumping actions or investigated the influence of an isolated UB strength training intervention on high-intensity running or jumping performances. Of the 4730 articles, 7 studies met the inclusion criteria, reporting correlations for 16 high-intensity running or jumping tests. No intervention studies were identified. Preliminary findings of the limited number of studies highlight that greater UB maximal strength-generating capacity may positively influence repeated sprint ability. While a significant moderate correlation between greater absolute UB strength and faster "flying" sprint was also reported, mixed results were found for sprint acceleration. There is also evidence that change-of-direction performance may greatly benefit from high maximal isometric strength of all trunk muscles and that strong trunk extensors may enhance drop jumps. This review identifies the potential of UB strength to contribute to high-intensity running and jumping actions. Future research is warranted to investigate this link via various UB strength tests and UB strength training protocols aimed at maximising neuromuscular adaptations.

Acute effects of intra-training carbohydrate ingestion in CrossFit® trained adults: a randomized, triple-blind, placebo-controlled crossover trial.

Carbohydrate (CHO) intake during exercise could decrease the subjective perceived exertion and promote recovery; however, the effects of intra-training CHO ingestion remain uncertain in CrossFit® (CF) sessions. Therefore, the aim of this randomized, triple-blind, placebo-controlled crossover trial was to investigate the effect of acute CHO intake during a CF session on the delayed onset muscle soreness (DOMS), the perceived exertion (RPE), performance, recovery, and metabolic markers (capillary lactate and glucose) in CF athletes. Twenty-three male athletes trained in CF ingested CHO (60g of maltodextrin + fructose) or a placebo (PLA) during a CF session. DOMS was assessed 24 and 48h after the CF session. The Counter Movement Jump (CMJ) test and the Deep Squat test at 70% of the athlete's body weight (AST70) were performed before, immediately after, and 24h after the session. Perceived exertion, Feeling Scale (FS), Gastrointestinal Distress Score (GDS), heart rate, capillary lactate, and glucose were assessed across the session. CHO supplementation did not improve DOMS (all P ≥ 0.127), CMJ, or AST70 parameters (all P ≥ 0.053) compared to PLA. There were no differences between CHO and PLA in RPE, FS, GDS, heart rate (all P ≥ 0.088), performance (e.g., nº of repetitions; all P ≥ 0.556), or lactate levels (P = 0.810). However, glucose levels increased from the back squat to the WOD and remained stable after the AMRAP (P < 0.001). In conclusion, acute CHO intake during a CF session did not improve DOMS, perceived exertion, performance, recovery, or metabolic markers in CF athletes. TRN: NCT06440343. Date: 2024-05-10.

Correlation between dynamic balance, lower limb muscle power, and speed performance in sprinters: a cross-sectional study

Abstract The ability to balance and generate muscle force are critical components of sprint performance. This study aimed to investigate the relationship between speed, lower limb muscle power, and dynamic balance in sprinters. A total of 75 sprinters, aged 18-30 years, from various sports academies and clubs in Belagavi, were recruited for this observational study. Dynamic balance was assessed using the Modified Star Excursion Balance Test (SEBT) and Multiple Single Leg Hop Stabilization Test (MSLHST), while muscle power was measured through the Sargent Jump Test. Speed was evaluated using the 30 m Sprint Test. Data analysis using Pearson’s correlation revealed a moderate positive correlation between speed and both dynamic balance (dominant leg r = 0.336, non-dominant leg r = 0.320) and muscle power (r = 0.32). Statistically significant correlations were observed between dynamic balance and speed (dominant leg , non-dominant leg ), and between muscle power and speed (). These findings suggest that improvements in dynamic balance and muscle power are associated with increased speed, highlighting their importance in sprint performance training.

The Relationship Between Core Muscle Endurance, Dynamic Balance, and Some Physiological Factors in Young Football Players with Genu Varum

Background: Genu varum, a common knee alignment issue, may negatively affect physical performance in athletes, particularly in sports requiring balance, agility, and strength, such as football. Objectives: This study aimed to examine the impact of genu varum on dynamic balance, core muscle endurance, and various athletic performance metrics in male football players. Methods: This descriptive and correlational study included 42 young football players, 21 with genu varum and 21 without. All participants trained at least three times per week and were screened for genu varum using a caliper. After applying inclusion and exclusion criteria, the participants completed tests to assess dynamic balance, core muscle endurance, lower body strength, agility, and speed. Key performance evaluations included the Sargent Jump test, a 9x4 meter agility test, and a 36-meter sprint. Independent t-tests were conducted to compare the two groups. Statistical analyses were performed using SPSS version 22, with a significance level set at 0.05. Results: Significant differences were found between the two groups. Players with genu varum showed reduced dynamic balance in all directions (anterior: P = 0.001, posterior-medial: P = 0.002, posterior-lateral: P = 0.004), lower body strength (P = 0.001), agility (P = 0.02), abdominal muscle endurance (P = 0.004), and sprint speed (P = 0.003) compared to players without genu varum. Conclusions: The findings indicate that genu varum adversely affects essential athletic performance components, including balance, strength, agility, and speed, in young football players. These deficits may increase the risk of injury and impede long-term athletic development.

Associated Medial Meniscal Injury with ACL Reconstruction Results in Poorer Strength and Jump Tests Outcomes: A 6-Month Analysis of 504 Patients from the MERIScience Cohort.

Background/Objectives: After anterior cruciate ligament reconstruction (ACLR), a 6-month composite test is recommended during rehabilitation before the return to sport, and the influence of a meniscal tear is not known. The hypothesis was that the location and treatment of meniscus injuries could influence the results of the composite test. Methods: A retrospective single-center study was carried out of prospectively collected data involving 504 patients who performed a composite test 6 months after ACLR. Isolated ACLR was compared to ACLR with medial meniscus injuries (MM), lateral meniscus injuries (LM), and bimeniscal injuries (BM) using a composite test including a single-leg squat (SLS), a single-leg landing (SLL), a single hop for distance (SHD), a triple hop for distance (THD) and a side-hop test (Side-HT), isokinetic strength tests, and an assessment of the anterior cruciate ligament-return to sport after injury (ACL-RSI). Results: Compared with isolated ACLR, MM injury was associated with a quadricipital deficit at a velocity of 240°/s (14% ± 14% vs. 18% ± 18%, p = 0.02), hamstring deficit at 30°/s (14% ± 18% vs. 18% ± 18%, p = 0.02) and an increase in the hamstring/quadricipital ratio at 240°/s (68% ± 27% vs. 80% ± 67% p = 0.02). Furthermore, ACLR + MM or ML injuries in the operated knee generated an increase in the dynamic valgus frequency detected by the SLS, respectively (40% ± 49% vs. 51% ± 50%, p = 0. 05) and (40% ± 49% vs. 54% ± 50%, p = 0.02). Meniscal repair and meniscectomies showed no differences. Conclusions: These results show that meniscal injuries lead to muscle imbalance for MM injuries and impaired neuromuscular control for MM and LM injuries and suggest that meniscal repairs should be done. Moreover, rehabilitation must be adapted to meniscus injuries.

The Effect of Plyometric Methods on Increasing Leg Power in Sprint Athletes

This research aims to determine the effect of Plyometric Training on Increasing the Limb Power of Sprint Athletes. This research is based on the author's interest in plyometric exercises to apply to the 12-16 year age group, and looking at the population in applying research on leg power using plyometric exercises. The research method used is an experiment with a one group pretest-posttest research design. The population in this study were all athletic extracurricular participants of SMPN 1 SUKAWANGI who attended the athletic sports club (Sukawangi Athletics Club). Sampling in this study using saturated sampling technique, namely all members of the population were used as samples totaling 16 people. The instrument used in this study was the Standing Broad Jump Test. The data collection technique was carried out by giving an initial test before being given the treatment of a plyometric exercise program and the final test was given after the treatment of a plyometric exercise program. Data processing techniques were carried out with descriptive statistical analysis and correlation tests using SPSS version 15. Based on the results of the correlation test of the results of plyometric training from the initial test to the final test, it was found that plyometric training can significantly increase leg power.

The influence of leg muscle power, waist flexibility and self-confidence on soccer long passing ability

The problem in this study is the low ability of Long Passing soccer school players Buah Hati. This study aims to see the effect of leg muscle strength, waist flexibility and self-confidence on long passing ability, both directly and indirectly and simultaneously. This type of research is quantitative with a path analysis approach. the sample in this study were all 30 players of Buah Hati Football School. Sample withdrawal using saturated sampling technique. The leg muscle power instrument uses the Vetical Jump Test, waist flexibility using the Sit and reach test, confidence using a Likert scale model questionnaire and long passing ability with the Aerial Pass for Accuaracy test. The results showed that, (1) there is a direct effect of leg muscle power on long passing ability with ρz1 = 0.337 or 11.35%, (2) there is a direct effect of waist flexibility on long passing ability, with ρz2 = 0.458 or 20.97%, (3) there is a direct effect of self-confidence on long passing ability, with ρz3 = 0.225 or 5.06%, (4) there is an indirect effect of leg muscle power on Long Passing ability through self-confidence, with ρz31 = 0.1131 or 11.31%, (5) there is an indirect effect of waist flexibility on Long Passing ability through self-confidence, with ρz32 = 0.0893 or 8.93% and (6) there is an effect of leg muscle power, waist flexibility and self-confidence simultaneously on three point shooting ability, with ρz123 = 0.942 or 94.2%.

Age-Related Differences and Reliability of a Field-Based Fitness Test Battery in Young Trained Footballers: The Role of Biological Age.

the purpose of this study was to analyze the reliability of a field-based fitness test battery in young trained football players, according to biological age. 197 young trained football players (12-19 years old) participated in the study. We measured anthropometric measurements (i.e., height, sitting height, length leg, and body mass), a bilateral vertical jumping test (CMJ), a progressive loading test of squats and hip thrust, acceleration and speed tests (10 m and 30 m sprint tests), a change-of-direction ability test (V-cut test), and a cardiorespiratory fitness test (30-15 intermittent fitness test). Statistical data are shown as the mean ± standard deviation by PHV group in tests and retests. Test reliability was assessed through the intraclass correlation coefficient (ICC), with an ICC above 0.9 being considered high. To evaluate accuracy and repeatability, standard error of measurement, coefficient of variation, and minimum detectable change at 90% were determined and Bland-Altman diagrams were used, establishing a statistical significance of p < 0.05. All of the tests showed non-significant differences between the test and retest in the pooled sample (p > 0.05). Furthermore, all of them presented a trivial effect size (<0.2) and high intraclass correlation coefficients (>0.9), which indicates the high reproducibility of the tests, despite some of them presenting a significant difference between trials (i.e., the CMJ, 10 m sprint, V-cut, and squat tests). Low measurement errors were found for all tests (coefficient of variation [CV] = 4.39-9.39), except for the CMJ and the progressive loading test for squat and hip thrust exercises (CV = 12.2-21.11). Similar results were found irrespective of biological age group. All tests were reliable for the pooled sample as well as for the biological age groups.

Estimating Muscle Fiber-Type Composition in Elite Athletes: A Survey on Current Practices and Perceived Merit.

To gather information on practices and perceptions of high-performance experts regarding their athletes' muscle fiber-type composition (MFTC) and its estimation. A questionnaire on the noninvasive versus invasive estimation of MFTC was completed by 446 experts including coaches and sport-science/sports-medicine staff. Moreover, the perceived importance of MFTC for training and performance optimization was assessed. Differences between sport types (individual and team sports) were analyzed using chi-square tests. Forty percent of the experts implemented MFTC assessment in pursuit of performance optimization, while 50% did not know their athletes' MFTC but expressed a desire to implement it if they would be able to assess MFTC. Ten percent did not perceive value in MFTC assessment. Only 18% of experts believed thattheir athletes would undergo a muscle biopsy, leading to the adoption of alternative noninvasive techniques. Experts primarily relied on their experience to estimate MFTC (65%), with experts working in individual sports using their experience more frequently than those working in team sports (68% vs 51%; P = .009). Jump tests emerged as the second-most commonly employed method for estimating MFTC (56%). When only considering experts who are currently using MFTC, 87% use MFTC to individualize training volume and 84% to individualize training intensity. Experts value MFTC assessment primarily to individualize training but mainly rely on noninvasive methods to estimate MFTC. Some of these methods lack scientific validity, suggesting a continuing need for education and further research in this area.

Analysis of the relationship between upper body speed capacity and lower body strength of elite handball players specialized in winger position

Background and Study Aim. The physical demands of the winger position in elite handball require a unique combination of upper body speed and lower body strength. Therefore, identifying the optimal relationship between these two physical characteristics could improve performance for players in this role. This study aims to analyze the relationship between upper body speed capacity and lower body strength in elite handball players specializing in the winger position. Material and Methods. The study included 16 elite handball players specializing in the winger position from various teams in the National Handball League (Liga Zimbrilor). Four of these players were members of the Dinamo Bucharest team. Tests for evaluating the explosive strength of the lower limbs included the Squat Jump (SJ), Counter Movement Jump (CMJ), Counter Movement Jump with Free Arms (CMJb), and the maximum strength test (1RM) in squats. Specific technical training tests included triangular movement, a 30-meter sprint, and long-distance handball throws, focusing on speed and execution technique. Data analysis was conducted using KyPlot 6.0 software. Statistical indicators included median, standard deviation, coefficient of variation, and non-parametric Spearman correlation tests. Statistical significance was set at p &lt; 0.05. Results. The results show no statistically significant differences in lower limb strength between high-performance handball players (HPHP) and those specialized in the winger position (PSW) across various jump and squat tests (p &gt; 0.05). The Countermovement Jump (CMJ) test approached statistical significance (p = 0.084), while the CMJ with free arms (CMJb) and squat strength test did not show significant differences (p = 0.231 and p = 0.789, respectively). In the specific fitness tests, no significant differences were observed in the Triangle Movement test (p = 0.826), the 30-meter sprint (p = 0.404), or the handball throw test (p = 0.147). Correlation analysis indicated that squats and CMJb had positive correlations with improved performance in speed and distance tests, while CMJ showed a negative correlation with technical performance in agility tests. Conclusions. The findings suggest that lower limb strength and technical fitness are similar between elite handball players, regardless of specialization. This supports a unified training approach across player roles. However, targeted exercises like squats and CMJb may enhance specific performance aspects. These exercises improve dynamic strength and stability, which can benefit wingers' technical execution and speed.

Long-Term Effects of Different Number of Botulinum Toxin Injections Into the Gastrocnemius Muscle on Function and Muscle Morphology in Children With Cerebral Palsy

BackgroundBotulinum toxin (BoNT) injections are used to reduce spasticity, and sometimes repeated injections are required. The aim of this study is to investigate the effects of the number of BoNT injections into the gastrocnemius muscle on function, muscle morphology, muscle stiffness, and muscle vascularization in children with cerebral palsy (CP). MethodsThe study included 22 children with spastic-type CP aged five to 13 years who had previously received one, two, or three BoNT injections into the gastrocnemius muscle. A total of 29 gastrocnemius muscles were evaluated. Gastrocnemius muscle morphology was examined by ultrasonography, muscle stiffness by shear wave ultrasound elastography, and muscle vascularization by superb microvascular imaging. The functional status of the children was evaluated by the Gross Motor Function Measurement, the Timed-Up-and-Go Test, the Squat Test, the Vertical Jumping Test, and the Sit-and-Reach Test. ResultsIn the motor functions and muscle morphology values were similar in all three groups (P > 0.05). Muscle stiffness values were higher (P = 0.035) and vascularization values were lower (P = 0.03) in the group that received three injections compared with the groups that received one injection. There was a moderate positive correlation of the number of BoNTs with muscle stiffness (P < 0.05, r = 0.454) and a moderate negative correlation with muscle vascularization (P < 0.05, r = −0.497). ConclusionsRepeated BoNT applications have no effect on motor functions and muscle morphology in children with CP, whereas BoNT injections administered three times increase muscle stiffness and decrease vascularization.

Survei Tingkat Skill Related Fitness Pada Siswa-Siswi Sekolah Dasar Negeri Gugus 6-10 Fase C Di Kecamatan Sukun Kota Malang

The purpose of this study was to determine the level of physical fitness of students in public elementary schools in cluster 6-10 phase c in Sukun District, Malang City. This research is a survey research, using quantitative descriptive methods, the instrument used in collecting data is the Indonesian Student Fitness Test (TKSI). The study sample involved 95 public primary school students of cluster 6-10 phase c in Sukun District, Malang City. The results of the study showed that the 95 students of public primary schools of cluster 6-10 phase c in Sukun District, Malang City as a whole showed that the 40 Meter Run Test was dominated by the “Very Poor” category with 58 (fifty-eight) frequencies. The 8x10 Meter Shuttle Run Test is dominated by the “Excellent” category with 37 (thirty-seven) frequencies. Child Ball Test is dominated by the “Excellent” category with 44 (forty-four) frequencies. Dynamic Balance Test was dominated by the “Good” category with 53 (fifty-three) frequencies. Vertical Jump Test was dominated by the “Moderate” category with 42 (forty-two) frequencies. Hand Touch Reaction Test is dominated by the “Poor” category with 34 (thirty-four) frequencies. With this, the researcher hopes that public elementary schools in cluster 6-10 in Sukun District, Malang City will pay more attention and try to increase the overall level of physical fitness of students.

Autograft Choice and Jumping Performance After Anterior Cruciate Ligament Reconstruction: A Comparative Study on Professional Athletes.

The extensor apparatus of the knee is of paramount importance in generating the torque needed for a countermovement jump (CMJ), especially in jumping athletes. In anterior cruciate ligament reconstruction (ACLR) procedures, graft harvesting from the extensor apparatus may dramatically affect extensor strength and jumping performance. The focused jump training of professional jumping athletes would increase the likelihood of restoring jumping performance after ACLR, despite the graft choice (autologous bone-patellar tendon-bone [BPTB] or hamstring [HS] tendon). Cohort study; Level of evidence, 3. A retrospective evaluation of prospectively collected data was carried out. Only professional athletes were included, and all surgical procedures were performed by a single experienced surgeon. Data collection considered the type of surgery, sports activity, and functional evaluation at 3 months after surgery. From the functional evaluation, data on single-leg hop (SLH) test, triple hop (TH) test, and CMJ were extracted. Limb symmetry index (LSI) for maximal voluntary isometric contraction of the quadriceps and for each of the jumping tests was calculated. Multiple analysis of covariance (ANCOVA) models were used to assess mean differences among groups for the LSI in CMJ, SLH, and TH and estimate the effect of confounders. From a subsequent series of 208 athletes, 44 professional athletes were included for data collection. Of these, 26 were male and 18 were female. A jumping sport (basketball, volleyball) was played by 17 athletes, while a running sport (soccer, judo, rugby, tennis, ski) was performed by 27 athletes. The mean time from injury to surgery was 17.8 ± 14.5 days. At 90 days from surgery, the overall mean LSI for CMJ was 85.3% ± 8.9%, for SLH was 92.2% ± 6.4%, and for TH was 90.8% ± 6.1%. When ANCOVA was fitted using the interaction term with BPTB autograft and jumping sport, a nonsignificant effect on LSI for CMJ (P = .56), SLH (P = .72), and TH (P = .98) was observed. The results of the present investigation on professional athletes showed that no difference occurred within the study cohort in overall jumping performance between jumping and running athletes undergoing ACLR either with BPTB or with HS tendon grafts. Although some evidence suggests that quadriceps strength may be dramatically affected by the harvesting of BPTB, the overall performance of the jump was not compromised.

Validity and Reliability of OpenPose-Based Motion Analysis in Measuring Knee Valgus during Drop Vertical Jump Test.

OpenPose-based motion analysis (OpenPose-MA), utilizing deep learning methods, has emerged as a compelling technique for estimating human motion. It addresses the drawbacks associated with conventional three-dimensional motion analysis (3D-MA) and human visual detection-based motion analysis (Human-MA), including costly equipment, time-consuming analysis, and restricted experimental settings. This study aims to assess the precision of OpenPose-MA in comparison to Human-MA, using 3D-MA as the reference standard. The study involved a cohort of 21 young and healthy adults. OpenPose-MA employed the OpenPose algorithm, a deep learning-based open-source two-dimensional (2D) pose estimation method. Human-MA was conducted by a skilled physiotherapist. The knee valgus angle during a drop vertical jump task was computed by OpenPose-MA and Human-MA using the same frontal-plane video image, with 3D-MA serving as the reference standard. Various metrics were utilized to assess the reproducibility, accuracy and similarity of the knee valgus angle between the different methods, including the intraclass correlation coefficient (ICC) (1, 3), mean absolute error (MAE), coefficient of multiple correlation (CMC) for waveform pattern similarity, and Pearson's correlation coefficients (OpenPose-MA vs. 3D-MA, Human-MA vs. 3D-MA). Unpaired t-tests were conducted to compare MAEs and CMCs between OpenPose-MA and Human-MA. The ICCs (1,3) for OpenPose-MA, Human-MA, and 3D-MA demonstrated excellent reproducibility in the DVJ trial. No significant difference between OpenPose-MA and Human-MA was observed in terms of the MAEs (OpenPose: 2.4° [95%CI: 1.9-3.0°], Human: 3.2° [95%CI: 2.1-4.4°]) or CMCs (OpenPose: 0.83 [range: 0.99-0.53], Human: 0.87 [range: 0.24-0.98]) of knee valgus angles. The Pearson's correlation coefficients of OpenPose-MA and Human-MA relative to that of 3D-MA were 0.97 and 0.98, respectively. This study demonstrated that OpenPose-MA achieved satisfactory reproducibility, accuracy and exhibited waveform similarity comparable to 3D-MA, similar to Human-MA. Both OpenPose-MA and Human-MA showed a strong correlation with 3D-MA in terms of knee valgus angle excursion.

Concurrent Validity and Reliability of a Free Smartphone Application for Evaluation of Jump Height.

Background/Objectives: Jump test assessment is commonly used for physical tests, with different type of devices used for its evaluation. The purpose of the present study was to examine the validity and reliability of a freely accessible mobile application (VertVision, version 2.0.5) for measuring jump performance. Methods: With that intent, thirty-eight college age recreationally active subjects underwent test assessment after a specific warm-up, performing countermovement jumps (CMJs) and squat jumps (SJs) on a contact platform while being recorded with a smartphone camera. Jump height was the criterion variable, with the same formula being used for both methods. Data analysis was performed by two experienced observers. Results: The results showed strong correlations with the contact platform (ICC > 0.9) for both jumps. Furthermore, between-observer reliability was also high (ICC > 0.9; CV ≤ 2.19), with lower values for smallest worthwhile change (≤0.23) and typical error of measurement (≤0.14). Estimation error varied when accounting for both observers, with the SJ accounting for bigger differences (4.1-6.03%), when compared to the CMJ (0.73-3.09%). Conclusions: The study suggests that VertVision is a suitable and handy method for evaluating jump performance. However, it presents a slight estimation error when compared to the contact platform.

An Analysis on the Innovations between Physical Exercise Group and Yoga Group with Flamingo Balance and Standing Broad Jump Test

Yoga is a multifaceted spiritual tool with enhanced health and well-being as one of its positive effects. The components of yoga which are very commonly applied for health benefits are asanas (physical postures), pranayama (regulated breathing) and meditation. In this article we have discussed about the Standing Broad Jump test, Flamingo Balance Test, innovations between physical exercise group and yoga group.

Principal Component Approach and Relationship between Nomination Scale for Identification of Football Talent and Physical Fitness in Young Soccer Players

The present study aimed to investigate the relationship between the physical capabilities of young soccer players and their performance in game-related variables as assessed through the Nomination Scale for Identifying Football Talent (NSIFT) questionnaire. A total of 80 young soccer players, with an average age of 10.70 ± 1.02 years, participated in the research. Each player underwent a comprehensive assessment session that included the 5-0-5 Change of Direction (COD) test, the Illinois Agility Test, and the Countermovement Jump (CMJ) test. These assessments were selected to evaluate critical physical attributes essential for soccer performance such as agility, explosive strength, and the ability to change direction rapidly. To analyze the data, Principal Component Analysis (PCA), a statistical technique that reduces the dimensionality of large datasets while retaining as much variance as possible, was employed. The PCA results indicated strong sample validity as confirmed by the Kaiser–Meyer–Olkin (KMO) measurement index, which assesses the adequacy of the sample size for factor analysis. The analysis revealed two principal components: development and disposition, which together accounted for 73% of the total variance in the data. The development component encompasses various physical attributes that contribute to a player’s growth and improvement, including strength, speed, and agility. Conversely, the disposition component reflects innate qualities and cognitive skills that predispose players to excel in soccer such as decision making and game awareness. This research highlights the importance of incorporating physical assessments into talent identification processes, providing objective measures that complement subjective evaluations. This study contributed to the literature on talent identification in soccer, emphasizing the need for a multidisciplinary approach to nurture young athletes effectively. Future research should continue to explore the interplay between physical and cognitive skills in soccer to enhance player development and success in competitive environments.