Effects of sleep deprivation on sarcopenia and obesity: A narrative review of randomized controlled and crossover trials.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanisms and trials without a systematic review methodology
PubMed 34131601 · doi:10.22540/JFSF-06-050
What was done
The authors conducted a narrative review of randomized controlled and crossover trials evaluating the mechanistic effects of short-term sleep deprivation and fragmented sleep patterns on energy homeostasis, body composition, and skeletal muscle metabolism.
What was found
The abstract reports no quantitative figures or statistical values. It describes directional pathways wherein short-term sleep restriction alters dopamine receptor signaling to promote hyperpalatable food consumption, while concurrent hormonal alterations (decreased testosterone, elevated cortisol) foster systemic inflammation, insulin resistance, and suppression of muscle protein synthesis, collectively increasing the risk of sarcopenic obesity.
Why it matters
It conceptualizes how acute and chronic sleep disturbances may act as a dual risk factor for both skeletal muscle loss and excess adiposity (sarcopenic obesity) through convergent neurological, hormonal, and metabolic pathways.
Limits
The abstract contains no quantitative effect sizes, search parameters, or study selection criteria. As a narrative review, it lacks formal systematic screening, risk-of-bias assessment, or meta-analytic pooling. Specific participant characteristics and total sample sizes across reviewed studies are not provided in the abstract.
Cited by
- context Sleep disruption can have more of an impact on muscle protein synthesis in the body than dietary protein intake.