Case Report: Effect of low energy availability and training load on sleep in a male combat sport athlete.

Autor:	Thomas C; Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, United Kingdom.; School of Sport, Exercise and Health Sciences (SSEHS), Loughborough University, Loughborough, United Kingdom., Langan-Evans C; Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, United Kingdom., Germaine M; Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, United Kingdom.; SFI Centre for Research Training in Machine Learning, Dublin City University, Dublin, Ireland., Artukovic M; Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, United Kingdom., Jones H; Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, United Kingdom., Whitworth-Turner C; Department of Athletics, University of Pennsylvania, Philadelphia, PA, United States., Close GL; Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, United Kingdom., Louis J; Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, United Kingdom.
Jazyk:	angličtina
Zdroj:	Frontiers in sports and active living [Front Sports Act Living] 2023 Jan 06; Vol. 4, pp. 981755. Date of Electronic Publication: 2023 Jan 06 (Print Publication: 2022).
DOI:	10.3389/fspor.2022.981755
Abstrakt:	Purpose: The aim of this case report was to describe the sleep responses in a male combat sport athlete, who was engaging in both chronic (CWL) and acute (AWL) weight loss practices in order to reduce body mass for a national competition. Methods: During the first seven weeks of training (Phases 1 and 2), the athlete adhered to a daily energy intake (EI) equating to their resting metabolic rate (1700 kcal·day -1 ) followed by a reduction in EI (915-300 kcal·day -1 ) in the 5 days before weighing in (Phase 3). Nocturnal sleep was monitored throughout the 8-week training period using wristwatch actigraphy and frequent measurements of body mass/composition, daily exercise energy expenditure and training load (TL) were taken. Results: The athlete was in a state of low energy availability (LEA) during the entire training period. There was a very large decrease in LEA status during phase 3 compared with phases 1 and 2 (3 vs. 20 kcal·kgFFM·day -1 ) and there was a small decrease in TL during phase 3 compared with phase 2 (410 vs. 523 AU). The athlete's sleep efficiency increased throughout the training period, but total sleep time displayed a small to moderate decrease in phase 3 compared with phases 1 and 2 (386 vs. 429 and 430 min). However, correlational analysis demonstrated trivial to small, non-significant relationships between sleep characteristics and the athlete's LEA status and TL. Conclusion: These findings suggest that CWL and AWL practices that cause fluctuations in LEA and TL may be implemented without compromising the sleep of combat sport athletes. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (© 2023 Thomas, Langan-Evans, Germaine, Artukovic, Jones, Whitworth-Turner, Close and Louis.)
Databáze:	MEDLINE
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