Optimal homeostatic stress to maximize the homogeneity of adaptations to interval interventions in soccer players

Frontiers in Physiology, Journal Year: 2024, Volume and Issue: 15

Published: April 9, 2024

This study examined the uniformity of adaptations in cardiorespiratory fitness and bio-motor abilities by analyzing individual responses to measures representing mentioned qualities. Twenty-four male well-trained soccer players (Age = 26 ± 4 years; stature 181 3.8; Weight 84 6.1) were randomized two groups performing short sprint interval training [sSIT (3 sets 10 × s all-out sprints with 20 recovery between efforts 3 min rest intervals sets)] or a time-matched small-sided game [SSG v 15 m area relief in-between)]. Before after 6-week period, aerobic indices, cardiac hemodynamics, anaerobic power assessed through graded exercise test utilizing gas collection system, noninvasive impedance cardiography, lower-body Wingate test, respectively. Also, sport-specific determined measuring linear speed, change direction, jumping ability. Comparing inter-individual variability adaptive changes residuals indicated that sSIT induces more uniform first second ventilatory threshold (VT 1 & VT 2 ), stroke volume, peak output across team members than SSG. SSG also yielded lower proportions responders V˙O2⁡max , peak, average compared sSIT. Additionally, coefficient variation mean group response Short homogenized games members.

Language: Английский

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Supramaximal interval training using anaerobic speed reserve or sprint interval training in rowers

Frontiers in Physiology, Journal Year: 2025, Volume and Issue: 16

Published: March 27, 2025

Objective This study aimed to compare the consistency of physiological adaptations and inter-individual variability in response three distinct high-intensity interval training (HIIT) protocols—anaerobic power reserve (APR), maximal aerobic (MAP), sprint (SIT)—among elite male rowers. By exploring impact individualized intensity prescriptions, we sought identify most effective protocol for enhancing consistency, as well improving both anaerobic performance while minimizing individual responses. Methods Thirty well-trained rowers (mean age: 24.9 ± 3.1 years; height: 185 4.4 cm; body mass: 86 7.9 kg; fat: 12.5% 2.4%) participated study. All participants were members a national rowing team with an average 6 years competitive experience regular participation international championships. The intervention involved weeks HIIT, performed times per week, pre- post-tests assessing VO 2 max, cardiovascular efficiency (Qmax), (MSP, CP), 2,000-m performance. Results interventions resulted significant improvements Qmax, MSP, time trial (p < 0.05). SIT group exhibited largest relative improvements, max increasing by 6.3% (from 51.9 3.2 55.2 3.3 mL·kg -1 ·min , Cohen’s d = 1.05, 95% CI [0.57, 1.53]), Qmax 6.4% (Cohen’s 1.15, [0.66, 1.64]), 3.7% reduction 0.86, [0.39, 1.33]). Notably, demonstrated lowest across all measured outcomes, evidenced reduced coefficients variation narrower confidence intervals. Conclusion protocol, emphasizing exertion, led consistent greatest key metrics, including These results suggest that may be optimal approach maximizing Future research should explore long-term applicability potential integration other modalities further enhance

Language: Английский

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Physiological and performance adaptations to beta alanine supplementation and short sprint interval training in volleyball players

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: July 22, 2024

This study aimed to elucidate the impact of combining Beta-Alanine (BA) supplementation with short sprint interval training on cardiorespiratory fitness, anaerobic power, and bio-motor abilities in volleyball players. Twenty young male athletes were randomly divided into 2 equal groups performed 8 weeks while supplementing 4.8 g daily BA or placebo (polydextrose). The players evaluated for volleyball-specific (vertical jump, horizontal spike block 10-m linear sprint, T-test change direction speed) physiological parameters (cardiorespiratory fitness power) pre- post-intervention. Both demonstrated significant (p ≤ 0.05) improvements all measured variables over time. A time-regimen interaction was observed jumping ability enhancement from post-training, wherein elicited more changes both vertical jumps compared placebo. Analyzing residuals coefficient variations (CV) mean group that results uniformly inducing adaptive among individuals. Therefore, light these results, it is recommended coaches trainers take consideration utilization as an ergogenic aid enhance increase homogeneity responses period.

Language: Английский

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