Peer-reviewed research on sleep architecture, recovery, and their observed relationships with hormones and male health.
This study set out to explore how coffee, exercise, and sleep relate to semen quality in men. It surveyed 3,302 men aged 18-60, collecting semen samples and lifestyle data through…
This study looked at how depression, testosterone levels, and shift work are linked in men with symptoms of low testosterone. It reviewed medical records and survey data from 766 men…
This study set out to examine how sleep quality and daytime sleepiness together affect injury risk in physically active university students. It analyzed data from 418 students (199 males, 219…
This study set out to see whether men who like and seek out sunlight have less depression and better sleep. It used 7,306 American men from NHANES (a large, recurring…
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…
This study looked at whether poor sleep affects semen quality in young men. It surveyed 953 healthy Danish men aged around military-service age, asking about their sleep patterns and measuring…