Effects of Creatine Monohydrate Loading on Sleep Metrics, Physical Performance, Cognitive Function, and Recovery in
Khouloud Ben Maaoui1,2, Slaheddine Delleli1,3, Nourhène Mahdi1,2
1High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax 3000, Tunisia.
Creatine monohydrate (CrM) supplementation improved subjective sleep quality and cognitive function in active men. This study found CrM enhanced physical output and reduced muscle soreness, suggesting benefits beyond traditional ergogenic effects.
Area of Science:
- Sports Science
- Nutritional Science
- Exercise Physiology
Background:
- Creatine monohydrate (CrM) is known for enhancing physical performance and recovery.
- Its effects on sleep and cognitive function require further investigation.
Purpose of the Study:
- To determine the impact of a 7-day CrM loading phase on sleep, physical performance, cognitive function, and recovery in physically active men.
Main Methods:
- Randomized, double-blind, placebo-controlled crossover study with 14 active men.
- Supplementation involved 20 g/day of CrM or placebo for 7 days.
- Sleep monitored via actigraphy; performance, cognitive function, and recovery assessed using validated scales and tests.
Main Results:
- CrM improved subjective sleep quality (SSQ scale) and led to earlier in-bed times.
- Significant improvements observed in cognitive performance (DCT) and physical output (5mSRT: TD, BD).
- Reduced muscle soreness (Hooper questionnaire) noted, but no significant effects on objective sleep metrics or other recovery markers.
Conclusions:
- A 7-day CrM loading protocol enhances subjective sleep quality, cognitive function, and high-intensity exercise performance.
- CrM supplementation also reduces muscle soreness.
- Findings suggest CrM offers benefits beyond its established ergogenic role, impacting sleep and cognition.
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