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Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Sleep Profiles of Elite Swimmers During Different Training Phases
Author(s): Walsh, Joshua A
Sanders, Dajo
Hamilton, D Lee
Walshe, Ian
Keywords: swimming
Issue Date: Mar-2019
Citation: Walsh JA, Sanders D, Hamilton DL & Walshe I (2019) Sleep Profiles of Elite Swimmers During Different Training Phases. Journal of Strength and Conditioning Research, 33 (3), pp. 811-818.
Abstract: This study aims to describe the sleeping patterns during different training phases in competitive swimmers. Twelve national- and international-level swimmers (3 females and 9 males) were monitored during 4 different phases, consisting of a preparation training phase, a taper phase, a competition phase, and a rest phase. Sleep parameters were assessed using wrist activity monitors and self-reported sleep diaries. There was a moderately higher (d = 0.70–1.00) sleep onset latency during the competition phase compared with taper, train, and rest phases. Trivial to small differences were observed for total sleep time between phases (d = 0.05–0.40). Sleep efficiency was moderately higher (d = 0.60–0.75) in the training and taper phases compared with competition and rest. Restfulness and fragmentation index (FI) were lowest in the rest with differences between phases being small (d = 0.43–0.51) for restfulness and small to moderate (d = 0.43–0.62) for FI. Time in and out of bed was very largely later (d = 1.96–2.34) in rest compared with the other phases. Total nap time was moderately lower in rest (d = 1.13–1.18) compared with the training and competition phases, whereas there was a small difference (d = 0.46) compared with taper. To conclude, while there were trivial to small differences in sleep quantity between phases, there are small to moderate differences in other sleep parameters. Specifically, sleep onset latency was higher during the competition phase. In addition, this study highlights the substantial between-individual variations in sleep responses during different training phases.
DOI Link: 10.1519/jsc.0000000000002866
Rights: This is the accepted manuscript of an article accepted for publication in Journal of Strength and Conditioning Research. The final published version is available at:
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