Muscle mass and aging — sarcopenia prevention

The Practical Takeaway

Two non-negotiables. Everything else is optimization.

1. Lift 2-3 times a week. For real.

   Multi-joint movements (squat, hinge, push, pull, carry, single-leg work). 1-3 sets per movement, 5-12 reps, moderate-to-high intensity where tolerated. Include explicit power work — fast concentric reps with controlled descents — because rate of force production is what catches you when you trip.

2. Hit 1.0-1.6 g of protein per kg of bodyweight, every day, across at least three meals.

   Roughly 0.4 g/kg per meal, three meals, with at least 2.5-3 g of leucine per pulse. Whey, dairy, fish, eggs, lean meat are the easiest. If you can't reach the per-meal pulse from whole food, a 25-40 g leucine-enriched protein shake counts. During a fat-loss phase, hold the high end of the range and keep lifting — a deficit without protein-and-lifting is what accelerates the muscle loss you're trying to prevent.

3. Test vitamin D. Fix deficiency. Don't megadose if you're already adequate.

   Get serum 25(OH)D measured. If it comes back under ~50 nmol/L (about 20 ng/mL), supplement D3 daily 800-2,000 IU until corrected. Avoid intermittent megadoses (single 60,000 IU bolus) — some trials link them to falls in older adults.

4. Optional adjuncts with modest but real evidence.

   Creatine monohydrate 3-5 g/day (one small scoop) — especially helpful for older females, or anyone whose lifting program is genuinely consistent. Skip the "advanced" creatine forms; monohydrate has all the outcome data. Blood Flow Restriction training at low load is the bridge tool when high-load resistance training is contraindicated by joint pain or post-op restrictions.

Conviction

Sources

• Eggimann et al., 2025, J Am Geriatr Soc — DO-HEALTH trial, N=2,157 adults 70+, 3 years. No single intervention or combination significantly reduced sarcopenia incidence in this generally-healthy cohort. PMID 39565152.
• Bernabei et al., 2022, BMJ — SPRINTT trial, N=1,519 community-dwelling adults 70+ with physical frailty + sarcopenia. Multicomponent PA + protein/vitamin D counselling reduced mobility-disability HR 0.78 in the low-muscle-mass + low-SPPB subgroup over 36 months.
• Hettiarachchi et al., 2024, Ageing Research Reviews — Meta-analysis showing higher per-meal protein dose (≥0.4 g/kg) and even distribution across ≥3 meals associated with greater lean body mass gain than uneven distribution. PMID 38830547.
• Liao et al., 2019, Nutrients — Meta-regression of 37 RCTs showing protein plus exercise produces a small but significant additive effect on muscle mass beyond exercise alone (SMD ≈ 0.21). PMID 31349606.
• Dos Santos et al., 2021, Nutrients — Meta-analysis of creatine plus resistance training in older females. Significantly greater strength gains than RT plus placebo (SMD ≈ 0.32). PMID 34836013.
• Fragala et al., 2019, J Strength Cond Res — NSCA Position Statement on resistance training for older adults. Programming consensus: 2-3 sessions/week, multi-joint, moderate-to-high intensity, include power work. PMID 31343601.
• Cruz-Jentoft et al., 2019, Age and Ageing — EWGSOP2 sarcopenia definition (low strength + low muscle quantity/quality + low physical performance). The diagnostic anchor for every modern sarcopenia trial.
• Aragon, Tipton, Schoenfeld, 2023, Nutrition Reviews — Anabolic resistance review. Reframes "older adults need more protein" as "older adults need bigger per-meal pulses plus a loading stimulus." PMID 36018750.
• Pahor et al., 2014, JAMA — LIFE Study, N=1,635 sedentary 70-89-year-olds. Structured PA reduced major mobility disability HR 0.82 vs health-education control.
• Bauer et al., 2013, JAMDA — PROT-AGE position paper. Established 1.0-1.2 g/kg/day target for healthy older adults and 1.2-1.5 g/kg/day for those with acute or chronic disease.