Sarcopenia & Age-Related Muscle Loss

Sarcopenia is the involuntary loss of skeletal muscle mass, strength, and function with aging. Muscle mass typically declines from around the 3rd–4th decade, accelerating after ~60; strength and power decline faster than mass, and power (force × velocity) is lost earliest — which is why it strongly predicts falls and loss of independence.

Most effective countermeasure: progressive resistance training. Older adults retain the ability to gain strength and hypertrophy.

• ~2–3 days/week; multijoint exercises for all major muscle groups.
• Progress to moderate-to-higher relative intensity as tolerated (e.g., ~70–85% 1RM, 1–3 sets of 8–12 reps) once technique is sound; lighter loads to higher reps also work for less-conditioned individuals.
• Include power-style movements (moderate load moved quickly) where safe, since power loss is functionally important.
• Apply progressive-overload — gradual increase in load/volume.

Nutrition: adequate protein supports muscle protein synthesis; many guidelines suggest ~1.0–1.2 g/kg/day (or more, ~1.2–1.5 g/kg/day, in some recommendations for older adults) distributed across meals — see protein, protein. Adequate energy and vitamin D/calcium status also matter.

Educational only; individuals with frailty or chronic conditions should be guided by their clinician and ideally supervised initially.

• Sarcopenia = age-related loss of muscle mass, strength, and function.
• Strength and especially power decline faster than mass; power loss predicts falls.
• Progressive resistance training is the primary countermeasure; older adults can still gain.
• ~2–3 d/wk, multijoint, progress to moderate-higher intensity; add power work where safe.
• Protein ~1.0–1.2 g/kg/day (often higher recommended for older adults), spread across meals.

• older-adults — broader senior activity prescription.
• osteoporosis — loading helps muscle and bone together.
• recovery-nutrition-40plus — per-meal protein dosing and recovery spacing that counter anabolic resistance.
• protein — protein targets supporting muscle retention.
• progressive-overload — the driver of gains at any age.