Muscle
Strength, recovery, and skeletal muscle performance.
Overview
Skeletal muscle powers movement, but it is also a metabolic organ — a store for glucose, a driver of insulin sensitivity, and a key determinant of strength, independence, and healthy aging.
Why it matters
Muscle mass and strength predict function and mortality, and both decline with age unless actively maintained. Preserving muscle is one of the highest-yield investments in healthspan.
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How this usually unfolds
- Understand the system
- Know the key biomarkers
- Learn the common conditions
- Apply evidence-based interventions
Major functions
- Movement and force production
- Posture and joint support
- Glucose disposal and metabolism
- Protein reserve
- Heat production
Common conditions
Prevention
- Strength train across the lifespan
- Eat adequate protein
- Stay active daily
- Avoid prolonged bed rest
Improvement strategies
- Progressive overload resistance training
- Protein distribution across meals
- Creatine (well-evidenced)
- Managing underlying illness
Explore this system across BioSignal
Related Foundations
Related Signal Records
Related biomarkers
Related peptide families
Related body systems
Related lifestyle interventions
Related diagnostics
Frequently asked questions
How much protein do I actually need?
Many healthy, active adults do well toward the higher end of common recommendations, distributed across meals. See the Protein Intake Foundation for the evidence.
Is it too late to build muscle in older age?
No. Older adults respond well to resistance training and protein; it's one of the most effective ways to protect independence.
Educational information — not medical advice
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