Nature and science of sleep2024n = 17
OtherHuman
This study looked at how light exposure affects sleep in professional athletes. It tracked 17 male Australian Football players for 14 days, using wrist devices to measure sleep and light…
Journal of sleep research2024n = 21
RCTHuman
This study set out to measure how the amount of caffeine in the blood tracks with sleep depth and heart activity. Twenty-one healthy young men took either 160 mg of…
Acta psychologica2024n = 35,811
Meta AnalysisHuman
This review asked whether the amount of activity men already do tracks with depressive symptoms. It pooled 5 observational studies covering 35,811 men. Each study had labeled men as inactive,…
Andrology2024n = 1,055
Cross SectionalHuman
This study looked at whether sleep duration affects markers of male fertility in young men. It analyzed 1,055 Danish men who reported their sleep habits and gave semen and blood…
Nutrients2024n = 19
OtherHuman
This study looked at whether taking ZMA, a supplement combining zinc, magnesium and vitamin B6, before bed for two nights could improve sleep and next-day performance in healthy active men.…