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Poor Sleep

Research on sleep loss and disruption in men, and what it costs hormones, recovery, and metabolism.

30Studies

30Human studies

2026Most recent

5Countries

Dose and timing effects of caffeine on subsequent sleep: a randomized clinical crossover trial.

Sleep2025n = 23

RCTHuman

This study tested how different doses and timing of caffeine affect sleep in men who usually drink moderate amounts. It compared a placebo, 100 mg, and 400 mg of caffeine…

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Effects of Creatine Monohydrate Loading on Sleep Metrics, Physical Performance, Cognitive Function, and Recovery in Physically Active Men: A Randomized, Double-Blind, Placebo-Controlled, Crossover Trial.

Nutrients2025n = 14

RCTHuman

This study looked at whether a short, high-dose creatine (a compound stored in muscle that helps regenerate quick energy for short, hard efforts) routine improves sleep, performance, thinking, and recovery…

Better Sleep Brain Fog Creatine

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