What question did this study set out to answer?

The main aim is to assess circadian misalignment in elite female athletes and its link to well-being.

April 3, 2026npj Biological Timing and SleepOpen Access

Field assessment of melatonin timing reveals circadian misalignment beyond chronotype in elite female football players

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Authors

CRCatia ReisUniversity of Lisbon RTRita TomásPortuguese Air Force Academy VCVasco CardosoUniversidade Católica Portuguesa

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Implication

Finds correlations between circadian timing, sleep duration, and well-being in elite female athletes, suggesting individualized interventions may help.

Key Points

The main aim is to assess circadian misalignment in elite female athletes and its link to well-being.
Monitored twenty-two elite female athletes during a one-week training camp.
Used actimetry devices to measure sleep patterns and light exposure.
Collected hourly saliva samples for melatonin assessment around habitual sleep onset.
Administered daily sleep diaries including well-being ratings.
Longer phase angle between melatonin onset and sleep onset linked to longer total sleep duration.
Evening chronotype and dissimilar roommate chronotype both associated with shorter sleep duration.
Morning melatonin elevation related to lower subjective well-being.

Cite This Study

Reis et al. (2026) studied this question.

synapsesocial.com/papers/69cf5d1f5a333a821460abef https://doi.org/10.1038/s44323-026-00074-4

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Implication

Finds correlations between circadian timing, sleep duration, and well-being in elite female athletes, suggesting individualized interventions may help.

Field assessment of melatonin timing reveals circadian misalignment beyond chronotype in elite female football players

Discussion

Member takes

Implication

Key Points

Cite This Study

Field assessment of melatonin timing reveals circadian misalignment beyond chronotype in elite female football players

Discussion

Member takes

Implication

Key Points

Cite This Study

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