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

Frontiers in Physiology, Год журнала: 2024, Номер 15

Опубликована: Апрель 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.

Язык: Английский

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A Comparative Analysis of High-Intensity Technique-Specific Intervals and Short Sprint Interval Training in Taekwondo Athletes: Effects on Cardiorespiratory Fitness and Anaerobic Power

Journal of Sports Science and Medicine, Год журнала: 2024, Номер unknown, С. 672 - 683

Опубликована: Авг. 20, 2024

Technique-specific high-intensity interval training (HIITTS) has been proven to be an effective method enhance the sport-specific bio-motor abilities of taekwondo athletes. However, studies regarding its effects on comprehensive measures cardiorespiratory fitness are limited. Furthermore, there is a lack clarity extent individual adaptations this compared HIIT in form repeated sprints (HIITRS). This study HIITRS and HIITTS anaerobic power trained athletes (age = 19.8 ± 1.3 years; body mass 75.4 9.1 kg; height 1.73 0.0 .m). All participants completed three sessions per week 60-minute regular training. Following training, 3 sets 10 × 4 s all-out or same kicks with both legs over 6-week period. In groups, rest intervals were set at 15 seconds between efforts one minute sets. Before after period, underwent series lab- field-based tests evaluate abilities. Both interventions resulted significant improvements maximum oxygen uptake (V̇O2max), O2 pulse (V̇O2/HR), first ventilatory threshold (VT1), second (VT2), cardiac output (Q̇max), stroke volume (SV), peak (PPO), average (APO), squat jump (SJ), countermovement (CMJ). linear speed (20-m time) taekwondo-specific agility test (TSAT) only responded HIITRS. greater changes V̇O2max, V̇O2/HR, VT2, Q̇max, higher percentage responders measured parameters than HIITTS. addition, elicited lower inter-individual variability (CV) percent from pre- post-training all variables. These results suggest that incorporating into significantly more homogenized among

Язык: Английский

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Physiological and Performance Adaptations to Varying Rest Distributions During Short Sprint Interval Training Trials in Female Volleyball Players: A Comparative Analysis of Interindividual Variability

International Journal of Sports Physiology and Performance, Год журнала: 2024, Номер 19(10), С. 1048 - 1057

Опубликована: Авг. 14, 2024

This study aimed to examine the impact of different rest periods between short sprint interval training (SSIT) trials on physiological and performance adaptations female volleyball players.

Язык: Английский

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Optimal Prescription for Superior Outcomes: A Comparative Analysis of Inter-Individual Variability in Adaptations to Small-Sided Games and Short Sprint Interval Training in Young Basketball Players

Journal of Sports Science and Medicine, Год журнала: 2024, Номер unknown, С. 305 - 316

Опубликована: Март 25, 2024

This study compared the inter-individual variability in adaptive responses to six weeks of small-sided games (SSG) and short sprint interval training (sSIT) young basketball players. Thirty well-trained athletes (age: 16.4 ± 0.6 years; stature: 190 8.4 cm; weight: 84.1 8.2 kg) voluntarily participated were randomly assigned SSG (3 sets 5 min 3v3 on full length (28 m) half-width (7.5 court, with 2 minutes passive recovery in-between), sSIT 12 × s sprinting 20 between efforts rest sets), or CON (routine basketball-specific technical tactical drills) groups, each ten. Before after period, participants underwent a series laboratory- field-based measurements evaluate their maximum oxygen uptake (V̇O2max), first second ventilatory threshold (VT1 VT2), pulse, peak average power output (PPO APO), linear speed, change direction (COD), countermovement jump (CMJ), vertical (VJ). Both sufficiently stimulated mechanisms involved enhancement mentioned variables (p < 0.05). However, resulted lower residuals percent changes V̇O2max = 0.02), O2pulse 0.005), VT1 0.001), PPO 0.03), speed 0.01) across SSG. Moreover, more responders than 0.02, φ 0.500), 0.003, 0.655), VT2 0.05, 0.436), 0.420). Our results indicate that creates consistent level mechanical physiological stimulus SSG, potentially leading similar adaptations team members.

Язык: Английский

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Adaptations to Optimized Interval Training in Soccer Players: A Comparative Analysis of Standardized Methods for Individualizing Interval Interventions

Journal of Sports Science and Medicine, Год журнала: 2023, Номер unknown, С. 760 - 768

Опубликована: Ноя. 15, 2023

Accurately prescribing supramaximal interval training facilitates targeting desired physiological adaptations. This study compared the homogeneity of adaptations in cardiorespiratory parameters to [i.e., intensities beyond maximal aerobic speed (MAS)] interventions prescribed using anaerobic reserve (ASR), attained at end 30-15 Intermittent Fitness Test (VIFT), and MAS. Using repeated-measures factorial design, during off-season phase athletes’ yearly cycle, thirty national-level soccer players (age = 19 ± 1.6 years; body mass 78.9 kg; height 179 4.7 cm; Body fat 11 0.9%) were randomized consisting 2 sets 6, 7, 8, 9-min intervals (from 1st 6th week), including 15 s running Δ%20ASR (MAS + 0.2 × ASR), 120%MAS, or 95%VIFT followed by passive recovery. All ASR, VIFT, MAS programs sufficiently stimulated adaptive mechanisms, improving relative oxygen uptake [V̇O2max (p < 0.05; ES 1.6, 1.2, 1.1, respectively)], absolute V̇O2max 1.5, 0.7), ventilation [V̇E 1.1)], O2 pulse [V̇O2/HR 1.4, 0.6)], first second ventilatory threshold [VT1 0.7, 0.8, 0.7) VT2 0.8)], cardiac output [Q̇max 1.0, 0.7)], stroke volume [SVmax 0.9, 0.5)]. Although there was no between-group difference for change abovementioned variables over time, ASR VIFT resulted a lower coefficient variation [CV (inter-individual variability)] exercise intensity determined as proportion Expressing according athlete’s would assist accurately facilitate imposing mechanical related stimulus ceiling. Such an approach leads identical stimulation across athletes with differing profiles potentially more homogenized

Язык: Английский

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Effects of a paddling-based high-intensity interval training prescribed using anaerobic speed reserve on sprint kayak performance

Frontiers in Physiology, Год журнала: 2023, Номер 13

Опубликована: Янв. 4, 2023

The aim of this study was to investigate physiological and performance adaptations high-intensity interval training (HIIT) prescribed as a proportion anaerobic speed reserve (ASR) compared HIIT using maximal aerobic (MAS). Twenty-four highly trained sprint kayak athletes were randomly allocated one three 4-weak conditions (N = 8) (ASR-HIIT) two sets 6 × 60 s intervals at ∆%20ASR (MAS-HIIT) six 2 min paddling 100% (MAS); or controls (CON) who performed sessions/week 1-h traditional endurance 70%-80% maximum HR. A graded exercise test on ergometer determine peak oxygen uptake (V̇O2peak), MAS, V̇O2/HR, ventilatory threshold. Also, participants completed four consecutive upper-body wingate tests asses average power output. Significant increases in V̇O2peak (ASR-HIIT 6.9%, MAS-HIIT 4.8%), MAS 7.2%, ASR -25.1%, -15.9%), Wingate output (p < 0.05 for both groups) seen with pre-training. ASR-HIIT resulted significant decrease 500-m -1.9% , 1,000-m -1.5% time. Lower coefficient variation values observed the percent changes aforementioned factors response MAS-HIIT. Overall, short period improves performances athletes. Importantly, inter-subject variability (CV) lower than Individualized prescription ensures similar demands across individuals potentially facilitates degrees adaptation.

Язык: Английский

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Adaptive responses of cardiorespiratory system and hormonal parameters to individualized high-intensity interval training using anaerobic power reserve in well-trained rowers

Frontiers in Physiology, Год журнала: 2023, Номер 14

Опубликована: Апрель 24, 2023

The current study investigated the efficacy of individualizing exercise intensity according to anaerobic power reserve (APR) on hormonal, physiological, and performance adaptations in athletes with different profiles. Sixteen highly-trained male rowers (age = 22 ± 3 years, height 183 6 cm, weight 83 7 kg, body fat 11 2%, experience 12 5 years) were randomized a high-intensity interval training consisting 2 × (6, 6, 8, 10, 10 repetitions from 1st 6th week, respectively) 60 s intervals using rowing ergometer at ∆%30 APR (APR ) or same sets 130% maximal aerobic (MAP ). In both groups, relief set 1:1 min rest between sets. On four occasions separated by 24 h recovery, participants attended laboratory assess 2000-m performance, oxygen uptake (V̇O max) related physiological adaptations, hormonal parameters. Significant increases observed V̇O max, ventilation first second ventilatory threshold, MAP sprinting (MSP), total testosterone, testosterone cortisol ratio response weeks protocols. coefficient variation (inter-subject variability) adaptive cardiorespiratory parameters HIIT performed protocol was lower than those group. However, this is not case for changes. Prescribing based an athlete’s may help create more consistent level mechanical stimulus relative capacity, potentially leading similar across varying Mechanisms influencing are multifactorial affected approach.

Язык: Английский

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Training characteristics and performance of two male elite short‐distance triathletes: From junior to “world‐class”

Scandinavian Journal of Medicine and Science in Sports, Год журнала: 2023, Номер 33(12), С. 2444 - 2456

Опубликована: Авг. 25, 2023

The sports-science literature lacks data on training and performance characteristics of international elite athletes over multiple seasons. present case study provided general two male short-distance triathletes in the Junior, U23, Elite categories.General were described swimming, cycling, running segments from 2015 to 2022 season. load was presented using ECO model while intensity distribution (TID) a triphasic model.Both increased their throughout Triathlete A his VO2max cycling by 20.6%, 16.7%. His power at speed 18.9% 11.0%, respectively. B improved 17.8% 16.1% 24%, 14.3%. trained average 14-17 h week. TID polarized.To achieve top level, it is necessary consider following measures: progression; improvements physiological variables; participation events starting youth categories.

Язык: Английский

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Intrasession Caffeine Intake and Cycling Performance After Accumulated Work: A Field-Based Study

International Journal of Sport Nutrition and Exercise Metabolism, Год журнала: 2024, Номер unknown, С. 1 - 6

Опубликована: Янв. 1, 2024

Background : Preexercise caffeine intake has proven to exert ergogenic effects on cycling performance. However, whether these benefits are also observed under fatigue conditions remains largely unexplored. We aimed assess the effect of ingested during prolonged subsequent time-trial performance in trained cyclists. Methods The study followed a triple-blinded, randomized, placebo-controlled cross-over design. Eleven well-trained junior cyclists (17 ± 1 years) performed field-based 8-min time trial “fresh” (i.e., after their usual warm-up) or two work-matched steady-state sessions (total energy expenditure∼20 kJ/kg and ∼100 min duration). During latter sessions, participants consumed (3 mg/kg) placebo ∼60 before trial. assessed power output, heart rate, rating perceived exertion mood state (Brunel Mood Scale) each session. Results No significant condition was found for mean output attained (365 25, 369 31, 364 32 W “fresh,” caffeine, condition, respectively; p = .669). Similar results were rate ( .100) 1.000) different domains (all > .1). Conclusions Caffeine exercise seems no Future studies should determine can be with larger doses greater levels.

Язык: Английский

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Accuracy and repeatability of the COSMED® Q-NRG max mobile metabolic system

PLoS ONE, Год журнала: 2025, Номер 20(3), С. e0319394 - e0319394

Опубликована: Март 20, 2025

Purpose To investigate the accuracy and repeatability of Q-NRG Max® metabolic system against a VacuMed simulator using wide range rates. Methods Sixteen rates (oxygen consumption 0.9–6 L/min), with different combinations minute ventilation, oxygen consumption, carbon dioxide production, were measured for 5 minutes, two times by single unit over course one week. Recordings performed early in morning, same trained technician, ventilated laboratory under atmospheric conditions. Accuracy was assessed ordinary least products (OLP) regression analysis, Bland-Altman plots, intraclass correlation coefficients (ICC), mean percentage differences, technical errors (TE) minimum detectable change (MDC) all three variables. This analysis 10 0.9–4 L/min) 16 to allow comparisons previous research. Intra-device absolute differences between measurements (MAPE), ICC, TE, MDC Repeatability investigated Results High agreement excellent ICCs (>0.998) observed variables when considering both The difference, TE 0.87%–1.01%, 0.67%–1.07%, 1.55%–2.49%, respectively first rates, −0.39%–0.65%, 0.58%–1.63%, 1.35%–3.81%, intra-device results showed an (=1.000), MAPE < 0.5%, 1%, ≤ 2%. Conclusion is valid reliable mobile measurement production. Measurements below 5% MDC, 2% recommended thresholds across up 6 L/min consumption.

Язык: Английский

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