Comparison of sleep status among three Japanese national wheelchair basketball teams.
Hirotaka Mutsuzaki, Kenji Tsunoda, Kazushi Hotta and 3 others
PMID 29410568WHAT IT FOUND
Japanese wheelchair basketball players on the Top male and Top female teams reported poorer sleep than U23 male players, and Top female players reported shorter sleep.
This was a questionnaire comparison, not a treatment test.
Key findings
01Top male and Top female players reported poorer sleep than U23 male players, with mean PSQI scores of 5.79 ± 3.02 in Top male, 5.72 ± 2.85 in Top female, and 3.83 ± 2.55 in U23 male.
02Insomnia was reported in 42.9% of Top male players, 55.6% of Top female players, and 25.0% of U23 male players.
03Top female players had shorter sleep duration (5.83 ± 1.03 hours) than U23 male players (7.10 ± 0.82 hours), and 61.1% of Top female players reported waking before 7:00 AM.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The sample was small, with 14 Top male, 18 Top female, and 12 U23 male players. All participants were national team players, so the results may not apply to other wheelchair basketball players or athletes. Sleep was measured by self-report, which can introduce recall or reporting bias. The study was cross-sectional, so it cannot show that becoming a Top player caused poorer sleep. Data were collected on the first day of training camp in different years and seasons for each group.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not conclude that poor sleep caused worse performance or that cooling and earlier training will improve sleep. The study only compared self-reported sleep at one time point and tested no intervention.