Dataset Information

Physiological and anthropometric determinants of critical power, W' and the reconstitution of W' in trained and untrained male cyclists.

ABSTRACT: PURPOSE:This study examined the relationship of physiological and anthropometric characteristics with parameters of the critical power (CP) model, and in particular the reconstitution of W' following successive bouts of maximal exercise, amongst trained and untrained cyclists. METHODS:Twenty male adults (trained nine; untrained 11; age 39?±?15 year; mass 74.7?±?8.7 kg; V?O2max 58.0?±?8.7 mL kg-1 min-1) completed three incremental ramps (20 W min-1) to exhaustion interspersed with 2-min recoveries. Pearson's correlation coefficients were used to assess relationships for W' reconstitution after the first recovery (W'rec1), the delta in W' reconstituted between recoveries (?W'rec), CP and W'. RESULTS:CP was strongly related to V?O2max for both trained (r?=?0.82) and untrained participants (r?=?0.71), whereas W' was related to V?O2max when both groups were considered together (r?=?0.54). W'rec1 was strongly related to V?O2max for the trained (r?=?0.81) but not untrained (r?=?0.18); similarly, ?W'rec was strongly related to V?O2max (r?=?- 0.85) and CP (r?=?- 0.71) in the trained group only. CONCLUSIONS:Notable physiological relationships between parameters of aerobic fitness and the measurements of W' reconstitution were observed, which differed among groups. The amount of W' reconstitution and the maintenance of W' reconstitution that occurred with repeated bouts of maximal exercise were found to be related to key measures of aerobic fitness such as CP and V?O2max. This data demonstrates that trained cyclists wishing to improve their rate of W' reconstitution following repeated efforts should focus training on improving key aspects of aerobic fitness such as V?O2max and CP.

SUBMITTER: Chorley A

PROVIDER: S-EPMC7560916 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Physiological and anthropometric determinants of critical power, W' and the reconstitution of W' in trained and untrained male cyclists.

Chorley Alan A Bott Richard P RP Marwood Simon S Lamb Kevin L KL

European journal of applied physiology 20200809 11

<h4>Purpose</h4>This study examined the relationship of physiological and anthropometric characteristics with parameters of the critical power (CP) model, and in particular the reconstitution of W' following successive bouts of maximal exercise, amongst trained and untrained cyclists.<h4>Methods</h4>Twenty male adults (trained nine; untrained 11; age 39 ± 15 year; mass 74.7 ± 8.7 kg; V̇O<sub>2max</sub> 58.0 ± 8.7 mL kg<sup>-1</sup> min<sup>-1</sup>) completed three incremental ramps (20 W min<su ...[more]

PMID: 32776219

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Project description:Background"Sleep Low-Train Low" is a training-nutrition strategy intended to purposefully reduce muscle glycogen availability around specific exercise sessions, potentially amplifying the training stimulus via augmented cell signalling. The aim of this study was to assess the feasibility of a 3-week home-based "sleep low-train low" programme and its effects on cycling performance in trained athletes.MethodsFifty-five trained athletes (Functional Threshold Power [FTP]: 258 ± 52W) completed a home-based cycling training program consisting of evening high-intensity training (6 × 5 min at 105% FTP), followed by low-intensity training (1 hr at 75% FTP) the next morning, three times weekly for three consecutive weeks. Participant's daily carbohydrate (CHO) intake (6 g·kg-1·d-1) was matched but timed differently to manipulate CHO availability around exercise: no CHO consumption post- HIT until post-LIT sessions [Sleep Low (SL), n = 28] or CHO consumption evenly distributed throughout the day [Control (CON), n = 27]. Sessions were monitored remotely via power data uploaded to an online training platform, with performance tests conducted pre-, post-intervention.ResultsLIT exercise intensity reduced by 3% across week 1, 3 and 2% in week 2 (P < 0.01) with elevated RPE in SL vs. CON (P < 0.01). SL enhanced FTP by +5.5% vs. +1.2% in CON (P < 0.01). Comparable increases in 5-min peak power output (PPO) were observed between groups (P < 0.01) with +2.3% and +2.7% in SL and CON, respectively (P = 0.77). SL 1-min PPO was unchanged (+0.8%) whilst CON improved by +3.9% (P = 0.0144).ConclusionDespite reduced relative training intensity, our data demonstrate short-term "sleep low-train low" intervention improves FTP compared with typically "normal" CHO availability during exercise. Importantly, training was completed unsupervised at home (during the COVID-19 pandemic), thus demonstrating the feasibility of completing a "sleep low-train low" protocol under non-laboratory conditions.

Dataset Information

Physiological and anthropometric determinants of critical power, W' and the reconstitution of W' in trained and untrained male cyclists.

Publications

Physiological and anthropometric determinants of critical power, W' and the reconstitution of W' in trained and untrained male cyclists.

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