Reduced Muscle Mass
Also known as: Sarcopenia · Lean Mass Loss · Muscle Wasting
Progressive lean-mass loss accelerates in midlife and is one of the strongest predictors of long-term metabolic and functional decline. It is hormonally and nutritionally driven and is reversible with resistance training plus targeted biomarker optimization.
What you need to know
Adults lose roughly 3–8% of muscle per decade after 30, accelerating after 60. The drivers are anabolic-signal loss (testosterone, growth hormone, IGF-1 axis), reduced protein synthesis efficiency, insulin resistance, vitamin D status, and disuse. Optimization pathways pair resistance training and protein intake with biomarker-guided hormone optimization where indicated. GLP-1 receptor agonists used for weight loss require explicit lean-mass preservation strategies.
How this entity relates
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