Research
Hormonal
Oxidative stress (ROS overproduction) and Calcium (Ca2+) overload are major triggers that exacerbate disuse-induced muscle atrophy by promoting protein breakdown and inhibiting synthesis.
Managing oxidative stress and calcium handling may help protect muscle during periods of inactivity. Antioxidants and strategies to maintain muscle membrane integrity might be beneficial, though the paper notes these are 'potential countermeasures' requiring more research.
GoodSupportsHIGH confidence
Oxidative stress... is now widely considered as a major trigger of the imbalance between protein synthesis and degradation leading to muscle atrophy... Highly elevated cytosolic free Ca2+ concentration in soleus and gastrocnemius muscles during disuse conditions... Both the overproduction of ROS and Ca2+ overload play an essential role in regulation of protein synthesis and degradation following disuse conditions
Why this rating
Strong evidence from animal models and mechanistic studies; human data is less direct but supported by general oxidative stress literature.
Source
Muscle Atrophy Induced by Mechanical Unloading: Mechanisms and Potential Countermeasures
Yunfang Gao et al. · Frontiers in Physiology · 2018
DOI 10.3389/fphys.2018.00235
narrative_reviewCited 273×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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