Increase In VO2max Research Articles

The effects of kettlebell training versus resistance training using the own body mass on physical fitness and physiological adaptations in obese adults: a randomized controlled trial

Aim of studyThis study aimed to explore the effects of different types of resistance training using kettlebells versus the own body mass, in comparison to a passive control, on key physical fitness and physiological parameters in young, obese adults.MethodsData from 60 sedentary, obese male college students, aged 17–26, were used for final analyses. Participants were randomly assigned to one of three groups: a control group (CG, n = 20, no training), a kettlebell resistance training group (KRTG, n = 20), or a bodyweight resistance training group (BWRTG, n = 20). Selected measures of physical fitness were tested using the 12-minutes run test, the push-up test, the sit-up test, and the sit-and-reach test. Physiological measures included vital capacity, resting and maximum heart rate (HRmax), mean arterial blood pressure, breath holding time, and respiratory rate. Biochemical variables were measured in the morning, in a fasted state, and comprised high and low density lipoprotein, total cholesterol, and triglycerides. The 12-weeks progressive KRTG and BWRTG were specifically tailored using sets, repetitions, and intensity levels.ResultsNotable findings include significant body fat reductions in BWRTG (p < 0.001; d = 1.53) and KRTG (p < 0.001; d = 1.43), and a substantial increase in VO2max for BWRTG (p < 0.001; d = 1.32) and KRTG (p < 0.001; d = 1.34) compared to CG. KRTG also showed significant improvements in vital capacity (p < 0.001; d = 1.61) and reductions in resting heart rate (p = 0.024, d = 1.05) and respiratory rate (p = 0.001, d = 1.55), with BWRTG showing similar trends (resting heart rate: p = 0.041, d = 1.35; respiratory rate: p = 0.001, d = 1.98). Both intervention groups significantly improved breath holding time (KRTG: p = 0.001, d = 1.58; BWRTG: p < 0.001, d = 1.98) and reduced total cholesterol and low-density lipoprotein levels compared to CG.ConclusionsThis study demonstrates that both KRTG and BWRTG are effective in improving body composition and selected fitness and physiological measures. Thus, resistance training using kettlebells or bodyweight training are recommended if the goal is to improve body composition and fitness in obese male adults.Trial RegistrationOSF, September, 28th 2023. https://doi.org/10.17605/OSF.IO/Z6Y9Gosf.io/2mb98

Increase of VO2 max After 8 Weeks Tuja Shuttle Run Exercise for Athletes in the 14-17 Year Age Group

The quest to enhance athletic performance through increased VO2max levels has led to exploring various training modalities, including the Tuja Shuttle Run, an innovative adaptation of High-Intensity Interval Training (HIIT). This study aims to address these gaps by examining the impact of a tailored HIIT protocol—the Tuja Shuttle Run—on the VO2max of young athletes. A total 50 athletes from KONI Kediri district and Keeltjes Soccer Academy, aged 14-17 years were recruited to be research subjects. The development of HIIT in this research was in the form of the Tuja Shuttle Run. The Tuja Shuttle Run intervention was carried out with a frequency of 3x/week for 8 weeks. Meanwhile, VO2max was gauged using the Multi-Stage 20-m Shuttle Run Fitness Test, a field test valued for its practicality despite debates on its precision relative to laboratory measures. Statistical analysis uses paired sample t-test with a significance level of 5%. Based on the results of the paired sample t-test shows that Sig. 0.000 or p ≤ 0.001, so it can be said that there was a significant difference between the pretest and posttest on the VO2max. Implementing an 8-week Tuja Shuttle Run training program can potentially enhance VO2max in athletes aged 14-17. Based on this research, further studies need to be carried out on the effect of Tuja Shuttle Run training by comparing each sport. Keyword: VO2max Enhancement, Tuja Shuttle Run, High-Intensity Interval Training, Athletic Performance, Youth Athlete Training

The Effect of HIIT on Increasing VO2 Max in White Water Rafting Athletes

This research was carried out to find out the effect of training using the High Intensity Interval Training (HIIT) model on increasing VO2 Max in white water rafting athletes. This research design is an experimental pre-post design. This research used 28 white water rafting athletes, consisting of 16 male athletes and 12 female athletes. The athlete's age range is 16-22 years. All research subjects were in healthy condition. All subjects were given the same treatment, namely training using the HIIT model. Intervention with HIIT cardio training. The HIIT training model uses an intensity of 90-100% of Maximal Heart Rate (MHR). HIIT is done with a ratio of 30 seconds of exercise then 3 minutes of rest. Exercise uses an intensity of 90% MHR in the first week and will be increased every week until it reaches 100% MHR. Exercises were carried out for 6 weeks with a frequency of 4x per week. VO2 Max measurements are carried out using a multistage test instrument. In this research, it can be seen that HIIT exercise carried out for 6 weeks with a frequency of 4 times per week can increase athletes' VO2 Max. There is a significant difference in VO2 Max between male and female athletes with a difference test result of P &lt; 0.05. Exercise using the HIIT model which is carried out for 6 weeks with a frequency of 4x a week can increase the VO2 Max of white water rafting athletes. HIIT training can be used as a recommendation to increase VO2 Max for white water rafting athletes.

IMPACT OF BLOOD FLOW RESTRICTION TRAINING AS A SUPPLEMENTAL REHABILITATION TECHNIQUE IN PATIENTS WITH CHRONIC ANKLE INSTABILITY: A LITERATURE REVIEW

Background and purpose: This literature review objective is to appraise the outcome of the Impact of blood flow restriction training as a supplemental rehabilitation technique for chronic ankle instability patients. Methods: This literature review constitutes the articles which were published in 2017-2023. The evidence search was performed on Google Scholar, PubMed, Web of Science, Pedro database and Cochrane Library. Results: According to 20 studies included in our review shows that BFR training has been useful in increasing muscle strength and hypertrophy; there was increased production of ATP in muscle mitochondria &amp; Increased VO2 max along with other neuro-myogenic factors, which indicate increased adaptations post-injury. Conclusion: This literature review, according to selective studies, demonstrates that the addition of BFR in conventional rehabilitation resulted in increased muscle adaptations like strength and hypertrophy, along with increased balance and tissue remodelling and decreased pain perception, which could be beneficial in the treatment of ankle dysfunction. Keywords: Blood Flow Restriction Training, Occlusion Training, KAATSU Training, Chronic Ankle Instability, Muscle Adaptations.

Effects of home-based exergaming on cardio-metabolic and cognitive health in physically inactive individuals.

To examine the effects of a home-based exergame training over 6 weeks on cardio-metabolic and cognitive health, as well as training adherence, in physically inactive individuals. Twenty participants were equipped with an exergame system specifically designed for use at home. Each participant performed at least three weekly exercise sessions at ≥80% of their individual maximum heart rate, over 6 weeks. Exercise duration increased biweekly until 75 min of vigorous exercise were performed in Weeks 5 and 6. Maximum oxygen uptake (VO2max), cardio-metabolic profiling, and neuro-cognitive tests were performed at baseline and study end. Additionally, training adherence was assessed via training diaries. After 6 weeks of home-based exergaming, VO2max increased significantly, while there was a significant decrease in heart rate (resting and maximum), blood pressure (systolic, diastolic and mean), and low-density lipoprotein cholesterol. Dynamic balance and reaction time improved after 6 weeks of exergaming. Training adherence was 88.4%. Home-based exergaming induced a clinically relevant increase in VO2max, a determinant of cardiovascular health, accompanied by further improvements in cardiovascular, metabolic and neuro-cognitive parameters. Exergaming may, therefore, offer an innovative approach to increasing regular physical activity, improving metabolic risk profile, and preventing chronic diseases.

Continuous Running vs. Interval Training on VO2Max Increase in 16-17-Year-Old Football Athletes at Bintang Kejora Football School Deli Serdang Regency

This study compares the Vo2Max effects of continuous running and interval training on 16-17-year-old football participants at Bintang Kejora football school in Deli Serdang Regency in 2022. The research method is experimental quantitative research. This study used purposive sampling to pick Bintang Kejora football school athletes under certain conditions. The study lasted six weeks with three training sessions per week. The statistical analysis of Vo2Max increase in the continuous running group showed a tcount of 6.56 and a ttable of 2.75, with α = 0.05. We reject H0 and accept Ha since the tcount is bigger than the ttable (6.56 &gt; 2.75). In 2022, the continuous running exercise group improved the Vo2Max results of 16-17-year-old football participants at Bintang Kejora football school (SSB), Deli Serdang Regency. Hypothesis II on interval training's Vo2Max rise had a tcount value of 6.11, higher than the crucial ttable value of 2.75. This means H0 is rejected and Ha is accepted. Thus, the interval training group affects the Vo2Max results of 16–17-year-old football participants at Bintang Kejora in Deli Serdang Regency. Upon assessing hypothesis III, the average standard deviation tcount value was 1.32, while the ttable value was 2.23, with α = 0.05. Low tcount values (tcount &lt; ttable) support the null hypothesis (H0) and reject the alternative hypothesis (Ha). This analysis suggests that continuous running or interval training have similar effects on Vo2Max outcomes for 16-17-year-old football players at the Bintang Kejora football school in Deli Serdang Regency.

Pengaruh Circuit Training dan Kadar Oksigen dalam Minuman Terhadap Nilai VO2MAX

This study aims to determine the effect of Circuit Training and oxygen levels in beverages on the VO2 MAX value of Rugby SME students. The sample used in this study amounted to 10 students of Rugby SMEs. The instrument in this study used the bleep test. The results of the analysis showed that there was a significant difference between the VO2 MAX value before and after the Circuit Training and the provision of beverages with high oxygen levels with data t-count value of 5.15 is greater than the T-table value of 1,833. This means that the difference in average VO2 MAX before and after exercise can be said to be significant with a significant level of 0.5%. The results of data analysis showed a significant effect between Circuit Training and the provision of drinks with high oxygen levels to the value of VO2 MAX Rugby UKM students. The conclusion of this study shows that Circuit Training exercises and oxygen levels in drinks have a positive and significant impact on increasing VO2 MAX Rugby UKM students, with a significant level of 0.5%. T-count values greater than T-table values prove the existence of strong evidence to state significant differences between VO2 MAX before and after exercise.

Long-term iron supplementation combined with vitamin B6 enhances maximal oxygen uptake and promotes skeletal muscle-specific mitochondrial biogenesis in rats.

Iron is an essential micronutrient that plays a crucial role in various biological processes. Previous studies have shown that iron supplementation is related to exercise performance and endurance capacity improvements. However, the underlying mechanisms responsible for these effects are not well understood. Recent studies have suggested the beneficial impact of iron supplementation on mitochondrial function and its ability to rescue mitochondrial function under adverse stress in vitro and rodents. Based on current knowledge, our study aimed to investigate whether the changes in exercise performance resulting from iron supplementation are associated with its effect on mitochondrial function. In this study, we orally administered an iron-based supplement to rats for 30 consecutive days at a dosage of 0.66 mg iron/kg body weight and vitamin B6 at a dosage of 0.46 mg/kg. Our findings reveal that long-term iron supplementation, in combination with vitamin B6, led to less body weight gained and increased VO2 max in rats. Besides, the treatment substantially increased Complex I- and Complex II-driven ATP production in intact mitochondria isolated from gastrocnemius and cerebellum. However, the treatment did not change basal and succinate-induced ROS production in mitochondria from the cerebellum and skeletal muscle. Furthermore, the iron intervention significantly upregulated several skeletal muscle mitochondrial biogenesis and metabolism-related biomarkers, including PGC-1α, SIRT1, NRF-2, SDHA, HSL, MTOR, and LON-P. However, it did not affect the muscular protein expression of SIRT3, FNDC5, LDH, FIS1, MFN1, eNOS, and nNOS. Interestingly, the iron intervention did not exert similar effects on the hippocampus of rats. In conclusion, our study demonstrates that long-term iron supplementation, in combination with vitamin B6, increases VO2 max, possibly through its positive role in regulating skeletal muscle-specific mitochondrial biogenesis and energy production in rats.

The Effect of Concurrent Training on Some Cardiovascular Risk Factors, Serum Estradiol and Physical Fitness Indicators in Overweight Women With Type 2 Diabetes

Background and Purpose: Considering that diabetic patients have low physical fitness and are prone to cardiovascular diseases, there is a need to conduct studies for the prevention and treatment of these diseases. The present study investigates the effect of concurrent training (CT) on some cardiovascular risk factors, serum estradiol, and physical fitness indicators in overweight women with type 2 diabetes. Materials and Methods: The research method was quasi-experimental with a pre-test and post-test design. A total of 30 women with type 2 diabetes were randomly divided into CT and control (CON) groups. Concurrent training was performed for 8 weeks and 3 sessions per week. The CT program included resistance training with elastic bands, running with an intensity of 70%-85% of the maximum heart rate, and skipping rope training with 40-45 jumps per minute. Forty-eight hours before and after the intervention, blood samples were collected from all participants in a fasting state to evaluate serum glucose, triglyceride, cholesterol levels, and estradiol. The VO2 max and upper body and lower body strength indicators were also assessed in all participants. The data was analyzed using the statistical method of ANOVA with repeated measures. Results: The results showed a significant increase in VO2 max, serum estradiol, upper and lower body muscle strength, and a significant decrease in serum triglyceride and glucose in the CT group compared to the CON group (P&lt;0.05). No significant difference was observed in low-density lipoprotein/high-density lipoprotein ratio and total cholesterol (P&gt;0.05). Conclusion: Eight weeks of concurrent training can improve physical fitness indicators and some cardiovascular risk factors in overweight women with type 2 diabetes.

Impact of Ayurveda-based lifestyle modification, diet, and panchakarma on the hemodynamic parameters in heart failure patients with preserved ejection fraction

Abstract Background: Heart failure (HF) with preserved ejection fraction (HFpEF) is a medical problem with a growing prevalence that requires sophisticated management techniques. New management strategies for HF have constantly been called for by researchers, which has drawn our attention to Ayurveda, the traditional alternative medicine practiced extensively in India. One such treatment used to treat heart failure is Heart Failure Reversal Therapy (HFRT), which combines herbal therapies including Snehan, Swedan, Basti (per rectal drug administration), and Hridaydhara. Objective: The study is aimed to evaluate the effects of HFRT and Ayurveda Dinacharya on known chronic HFpEF patients. Materials and Methods: This observational study was conducted between May 2021 and October 2021, wherein patients (both genders) with HF (New York Heart Association, NYHA Class I, II, and III) having a left ventricular ejection fraction of more than 40 and aged between 18 and 60 years were identified. The effect of study therapy, HFRT, and Ayurveda Dinacharya over 7 days in 14 sittings was observed. A total of 73 patients with HFpEF underwent study therapy for 7 days. Data related to patient demographics on Cardiac Output (CO), Diastolic Blood Pressure (DBP), Heart Rate (HR), Left Ventricular (LV), Systolic Blood Pressure (SBP), Systemic Vascular Resistance (SVR), Systolic (SYS), End-diastolic volume (EDV), Ejection factor (EF), etc. were analyzed pre- and post-study. Results: There was a remarkable improvement in the mean values of SVR from day 1 to day 7. The mean value of SVR on day 1 was 2271.39 ± 509.66, and on day 7 was 1876.18 ± 315.21. Reduced SVR values mean the amount of LV force needed to open the aortic valve is also reduced. This causes more efficient pumping action in the left ventricle, reflected by increased CO and increased VO2 max, thus improving the quality of life. Conclusion: The HFRT therapy and Ayurveda Dinacharya for seven days demonstrated a significant change in the hemodynamics of HFpEF patients, thus improving the quality of life.

Peningkatan vo2max atlet sprint 400 meter dengan metode latihan sirkuit 6 minggu

This study aims to determine the increase in Vo2Max of seprint athletes with the sirciut training method for 6 weeks. The type of research is pre-experiment with the design of the one group pretest-postest design. The population was 20 people and the sample used was 10 people consisting of 6 men and 4 puris, which were determined purvosip. Each sample received circuit training 18 times, with a frequency of 3 times a week. The instrument used to measure V02Max athletes before and after training using the multistage fitness test. Data analysis using anova system. The results of the analysis showed a significant difference where (ρ &lt; 0.05) the average value before treatment was 37.1 ± 5.2 (ml / kg / min) and the average value after treatment averaged 39.4 ± 4.7 (ml / kg / min). The conclusion of this study is that there is a difference that occurs between before and after being treated with circuit training for 6 weeks, and a coach must carefully choose training methods to avoid boredom in athletes, the exercises given are in accordance with muscle contractions in the sport and improve cardiovascular.

Low- and high-volume blood-flow restriction treadmill walking both improve maximal aerobic capacity independently of blood volume.

Assess the effect of low- and high-volume blood flow restriction training (BFR) on maximal aerobic capacity (VO2 max) and determine if alteration in VO2 max is mediated through changes in hemoglobin mass (Hbmass) and blood volume. Participants' Hbmass (CO-rebreathe), single, and double-leg VO2 max and blood volume regulating hormonal responses (renin and copeptin) were measured before and after BFR training. Training consisted of treadmill walking either (1) twice-daily for 4week (CON and BFRHV ) or (2) twice-weekly for 6week (BFRLV ). Each session consisted of five intervals (3 min, 5% incline, 5 km/h, 100% of lowest occlusion pressure), with 1 min of standing rest between sets. VO2 max increased using both training exposures, in as quickly as 2-weeks (BFRLV baseline to 4week: +315 ± 241 mL (8.7%), p = 0.02; BFRHV baseline to 2week: +360 ± 261 mL (7.9%), p < 0.01), for the BFRLV and BFRHV groups, with no change in CON. Single- and double-leg VO2 max improved proportionately (single/double-leg VO2 max ratio: BFRLV 78 ± 4.9-78 ± 5.8%, BFRHV 79 ± 6.5-77 ± 6.5%), suggesting that the mechanism for increased VO2 max is not solely limited to central or peripheral adaptations. Hbmass remained unchanged across groups (CON: +10.2 ± 34 g, BFRLV : +6.6 ± 42 g, BFRHV : +3.2 ± 44 g; p = 0.9), despite a significant release of blood volume regulating hormones after initial BFR exposure (renin +20.8 ± 21.9 ng/L, p < 0.01; copeptin +22.0 ± 23.8 pmol/L, p < 0.01), which was blunted following BFRHV training (renin: +13.4 ± 12.4 ng/L, p = 0.09; copeptin: +1.9 ± 1.7 pmol/L, p = 0.98). BFR treadmill walking increases VO2 max irrespective of changes in Hbmass or blood volume despite a large release of blood volume regulating hormones in response to BFR treadmill walking.

Regular soccer training improves pulmonary diffusion capacity in 6 to 10 year old boys

BackgroundSoccer is one of the most attractive sports around the globe for children and adolescents, and the benefits of soccer training are often shown. Due to the intermittent character of soccer with random changes between high-intensity activity and low-intensity play, athletes’ aerobic (respiratory) capacity is specifically stimulated. However, little is known about the effects of regular soccer practice on pulmonary diffusion capacity (TL) in young players, even though it is the most popular sport in the world.ObjectivesTo analyze the effects of 28 weeks of regular soccer training versus a non-activity control period on the TL, the alveolar-capillary membrane diffusion capacity (DM) as well as the capillary blood volume (Vc) in healthy prepubertal boys aged 6 to 10 years.MethodsFor this purpose, boys were randomly assigned to a soccer training group (SG, n = 40) or a control group (CG, n = 40). Pre and post-intervention, all participants performed an all-out graded bicycle ergometer test to measure maximal oxygen uptake (VO2max) and maximal aerobic power (MAP). A respiratory maneuver was performed at rest and just at the end of the test to measure the TL for carbon monoxide (TLCO) and nitric oxide (TLNO), DM, as well as Vc.ResultsThere were no significant baseline between-group differences for any of the assessed parameters (p > 0.05). Significant group-by-time interactions were found for most pulmonary parameters measured at rest (p < 0.05), with effect size (ES) values ranging from small-to-large (0.2 < ES < 4.0), except for VA (p = 0.3, ES = 0.006). Post-hoc tests indicated significant DM (p < 0.05; 0.2 < ES < 4.0), TLNO (p < 0.01; 0.22 < ES < 4.0), TLCO (p < 0,01; 0.24 < ES < 4.0) and Vc (p = 0.01; 0.404 < ES < 0.6) improvements for SG but not CG. Significant group-by-time effects were identified for HRmax and VO2max (p < 0.001; ES = 0.5 and p = 0.005; ES = 0.23 respectively). The post-hoc analyses indicated a significant decrease in HRmax and a significant increase in VO2max in the SG (p < 0.001; ES = 0.5 and p = 0.005, ES = 0.23, respectively) but not in CG. Values for TLCO increased by almost 20%; Vc of 14% DM of 8% and VA of 10% at the end of maximal exercise in SG. Furthermore, the percentage improvement was less notable in the control group (7.5% for TLCO; 2% for Vc; 5% for DM and 4% for VA).ConclusionRegular soccer training significantly improves pulmonary vascular function and increases DM and Vc after exercise in prepubertal boys. The observed adaptations are most likely due to better recruitment of additional pulmonary capillary function. However, the stepwise linear regression analyses indicated that increases in pulmonary vascular function were not related to improvements in VO2max and MAP.

Effects of Eight Week High-Intensity Interval Training Program Followed by a Six Week Detraining on Healthy Adult Gym-Users

Background: The literature has reported that high-intensity training (HIIT) can effectively improve maximum oxygen uptake (VO2 max) and body composition (BC). Still, contradictory results are reported regarding its impact of HIIT training and post-period detraining on gym users. Objective: This study aimed to verify how eight weeks of HIIT affects VO2 maximum and BC in healthy gym users. Additionally, the effect of a six-week detraining period was verified. A group of 10 gym-users (mean ± SD age: 29.03 ± 6.18 years) volunteered for this randomized controlled trial (RCT). Method: A HIIT program that included exercises such as jumping air squats, burpees and jumping jacks was applied over eight weeks. After this period, a six-week detraining period was applied. To measure changes in VO2 max, the Queen’s College Step Test (QCST) was applied, while a bioimpedance scale was used to measure BC. Results: Eight weeks of HIIT seem to show a tendency to increase VO2 max and cause positive changes in BC (p ≤ 0.05) with the exception of two variables (i.e., fat-free mass and fat mass). Furthermore, the results suggest that 6 weeks of detraining may negatively affect gains resulting from the training program, particularly in VO2 max and body mass index (BMI) p ≥ 0.05. Conclusions: Eight-week HIIT program incorporating short-duration explosive exercises can positively affect VO2 max and BC in adult gym users.

The Effect of Circuit Training On Increasing VO2 Max In Scorpio Jakarta Basketball Players

The basis for this research is the lack of endurance in Scorpio Jakarta KU-16 basketball players. This research aims to determine the influence of Circuit Training on increasing VO2MAX in Scorpio Jakarta basketball players. This research includes Pre-Experimental research. The population and sample in this study were Scorpio Jakarta basketball players aged 16 years and under, totalling 15 players. The test instrument in this research is the Bleep test. The data obtained were analyzed using the Normality Test ( Shapiro Wilk), Homogeneity Test ( Levene's Statistics ) and Hypothesis Test (T-Test). From the results of this research, the data was processed using the Shapiro-Wilk normality test using the SPSS application. The results of the pretest value show Sig= 0.469&gt;0.05, so the pretest data is declared to be normally distributed and the sig value. at posttest = 0.183&gt;0.05 then the posttest data is declared to be normally distributed. Then the homogeneity test, from the results of the research data, sig = 0.388 &gt; 0.05 was obtained, so the data was declared to have a homogeneous distribution. Next, a hypothesis test was carried out. From the results of the research data from both pretest and posttest data samples, it was found that the Sig. (2-failed ) value was 0.000 &lt; 0.05. It could be concluded that the results of the Hypothesis Test were accepted. So it means that there is an influence of Circuit Training on increasing VO2MAX in Scorpio Jakarta basketball players.

The impact of modified walking exercise incorporating intensity variations on increasing aerobic endurance

The aim of this study was to the effect of modified forms of exercise on increasing VO2Max in college students. In particular, This study focuses on assessing the effectiveness of interval training modifications, particularly in the form of walking exercises, in increasing VO2Max in college students. This study followed a quantitative approach, using an experimental design known as the one-group pre-test and post-test design. Cooper's test is used as a research instrument in this study. The study was undertaken with participants from the Department of Sports Development, Faculty of Sports Science, Universitas Negeri Yogyakarta, Indonesia. The findings of this study can be used as a reference for implementing a modified form of interval training, especially using walking patterns, to increase VO2Max in college students. Data analysis technique using Paired Sample t Test. The treatment group that underwent walking exercise experienced a significant increase in VO2Max, although the level of significance varied. In particular, the walking treatment group showed a significant increase with a significance value of 0.000.

A Functional Drink Containing Kaempferia parviflora Extract Increases Cardiorespiratory Fitness and Physical Flexibility in Adult Volunteers.

Owing to the reputation of Kaempferia parviflora and the crucial role of oxidative stress on the disturbance of physical fitness, the effect of a functional drink containing K. parviflora extract (KP) on the physical fitness of healthy adult volunteers was assessed. Healthy male and female volunteers (19-60 years old) were randomly divided into placebo, KP90, and KP180 groups. All the subjects in KP90 and KP180 were directed to consume a functional drink containing K. parviflora extract at doses of 90 and 180 mg per serving per 80 mL, respectively. Parameters of physical fitness, including cardiovascular endurance, muscular strength and endurance, flexibility, and body composition, together with changes in lactate, creatinine kinase, and oxidative stress markers were assessed before the intervention, and at 6 and 12 weeks of intervention. The oxidative stress markers, creatine kinase, and lactate were also measured. Subjects who consumed the developed drink had increased VO2 max and improved performance in a timed shuttle run test and 5 min distance run, and exhibited decreased oxidative stress and lactate; therefore, K. parviflora extract can be successfully used for developing a KP drink to improve cardiorespiratory fitness and physical performance by improving oxidative stress and lactate.

Impact of short term training on morphological, physical fitness and physiological variables of middle distance runners

Purpose: The present study was designed to investigate the effects of short term training on morphological, physical fitness and physiological determinants of middle distance runners. Method: Total of 97 male volunteers (age: 18-20 yrs.) (40- sedentary control, and 57- middle distance runners) were included randomly, and 17 middle distance runners were excluded. The rest were divided into (a) Sedentary Control Group (SCG, n = 40) and (b) Middle Distance Runners Group (MDR, n = 40). The volunteers of MDR followed a training schedule of 2 hrs/d, 5days/wk., for 6 wks.; no training was given in SCG. Results: A significant (p &lt; .05) increase in strength (of grip, back, leg, upper body strength, abdominal), anaerobic power, flexibility, VO2max, FEV1, FVC, PEFR; and decrease (p &lt; .05) in body mass, body fat and sprint time, heart rate (during rest, sub-maximal exercise and recovery) among the volunteers of MDR after 6 weeks of training. This study showed positive correlation between standing broad jump and height (r = +0.51, p &lt; .05); and between speed and leg strength (r = +0.52, p &lt; .05). Conclusion: Training have a positive impact on morphological, physical fitness and physiological variables of middle distance runners. Further research would provide conclusive results that can be extrapolated to general population.

Performance-Enhancing Drugs in Healthy Athletes: An Umbrella Review of Systematic Reviews and Meta-analyses.

Many clinicians, trainers, and athletes do not have a true understanding of the effects of commonly used performance-enhancing drugs (PEDs) on performance and health. To provide an evidence-based review of 7 commonly used pharmacological interventions for performance enhancement in athletes. PubMed and Scopus databases were searched on April 8, 2022. Systematic reviews (SRs) and meta-analyses (MAs) assessing the performance-enhancing effects of the following interventions were included: androgenic anabolic steroids (AAS), growth hormone (GH), selective androgen receptor modulators (SARMs), creatine, angiotensin-converting enzyme (ACE)-inhibitors, recombinant human erythropoietin (rHuEPO), and cannabis. Umbrella review of SRs and MAs. Level 4. Primary outcomes collected were (1) body mass, (2) muscle strength, (3) performance, and (4) recovery. Adverse effects were also noted. A total of 27 papers evaluating 5 pharmacological interventions met inclusion criteria. No studies evaluating SARMs or ACE-inhibitors were included. AAS lead to a 5% to 52% increase in strength and a 0.62 standard mean difference in lean body mass with subsequent lipid derangements. GH alters body composition, without providing a strength or performance benefit, but potential risks include soft tissue edema, fatigue, arthralgias, and carpel tunnel syndrome. Creatine use during resistance training can safely increase total and lean body mass, strength, and performance in high-intensity, short-duration, repetitive tasks. Limited evidence supports rHuEPO benefit on performance despite increases in both VO2max and maximal power output, and severe cardiovascular risks are documented. Cannabis provides no performance benefit and may even impair athletic performance. In young healthy persons and athletes, creatine can safely provide a performance-enhancing benefit when taken in controlled doses. AAS, GH, and rHuEPO are associated with severe adverse events and do not support a performance benefit, despite showing the ability to change bodily composition, strength, and/or physiologic measures. Cannabis may have an ergolytic, instead of ergogenic, effect.

HUBUNGAN BENTUK TELAPAK KAKI FLAT FEET DENGAN VO2 MAKS PADA ATLET PENCAK SILAT TINGKAT PROVINSI DKI JAKARTA BERDASARKAN LAMA LATIHAN

Flat feet can cause a reduction in the foot function resulting in fatigue when walking or running. This condition can result in a suboptimal intensity exercise required to improve VO2Max of Pencak Silat athletes. This study aimed to determine the relationship between the shape of foot and VO2Max based on training duration among Pencak Silat athletes at the provincial level of DKI Jakarta. The study used a cross-sectional design involving 46 athletes selected through a total sampling. The subject criteria for this study included athletes aged 17-24 years, healthy, and had no lower extremities problems. The study utilized footprint test and multistage fitness test instruments. The study found that 27 (58.7%) athletes had a normal foot shape, while 19 (41.3%) had flat feet. There were no differences in age, sex, body mass index, and training duration between the two groups of foot shape (p 0.05). The maximum VO2 value was 45.0 (7.2) ml/kg/min in athletes with normal foot shape and 40.1 (70.5) ml/kg/min in athletes with flat feet. The independent t-test revealed a significant difference in VO2Max between the two groups of foot shapes (p = 0.028). The increase of VO2Max was in line with the duration of exercise, but this increase was not significant in subjects with flat feet compared to those with normal foot shape. It concludes that flat feet are negatively associated with VO2Max of athletes. Pencak Silat athletes with flat feet must exert extra effort to enhance their VO2Max, such as interval training and kinesio taping. Further research is recommended to explore the impact of these efforts on improving VO2Max.