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Melatonin timing shows internal clock misalignment beyond sleep preference in elite female soccer players
Updated
Abstract
Essence
Morning melatonin elevation was linked to worse subjective well-being in elite female football players during a training camp.
Evidence
This one-week field assessment followed 22 elite female athletes with actimetry, sleep diaries, well-being ratings, and hourly salivary melatonin self-sampling around sleep and wake times.
Caveat
The study was small, limited to one national squad and one camp week, and reports associations rather than tested circadian interventions.
Simplified
Key numbers
11 of 19
Percentage of Athletes Experiencing Misalignment
Athletes waking during biological night based on melatonin levels.
7.37 h
Total Sleep Time in Mixed Chronotype Rooms
Average sleep time for athletes sharing rooms with mixed chronotypes.
5.93 h
Total Sleep Time in Same Chronotype Rooms
Average sleep time for athletes sharing rooms with the same chronotype.
Circadian Biology