4 Things About Strength Training That Apply at Any Age

Strength training is not about bodybuilding. These four facts explain why it is the most important exercise you can do for longevity, bone health, and independence.

1. Muscle Loss Starts Earlier Than You Think

After age 30, you lose 3-8 percent of your muscle mass per decade. After 60, the rate accelerates. This age-related muscle loss — called sarcopenia — is directly linked to falls, fractures, loss of independence, metabolic decline, and mortality. By the time most people notice they have gotten weaker, they have already lost significant muscle.

The only reliable intervention for sarcopenia is resistance training. No supplement, diet, or medication comes close to the muscle-preserving effects of regular strength training. Studies show that adults in their 80s and 90s can still gain meaningful muscle mass and strength with appropriate training. It is never too late to start, but starting earlier is always better.

Stephen Jepson uses monkey bars at 85 — functional strength training disguised as play.

2. Strength Training Builds Bones, Not Just Muscles

Osteoporosis affects 200 million people worldwide, and hip fractures are one of the leading causes of death and disability in older adults. Strength training is one of the most effective interventions for bone health because bones adapt to mechanical stress. When muscles pull on bones during resistance exercise, it triggers bone remodeling — the process that makes bones denser and stronger.

Walking and swimming, while excellent for cardiovascular health, do not provide enough mechanical loading to significantly improve bone density. Exercises that involve pushing, pulling, squatting, and lifting against resistance are what build and maintain bone. Even bodyweight exercises like push-ups, squats, and step-ups provide meaningful bone-building stimulus when performed consistently.

3. Two Days Per Week Is Enough

You do not need to live in a gym to get the benefits of strength training. The American College of Sports Medicine recommends a minimum of two sessions per week targeting all major muscle groups. Research consistently shows that two sessions produce 80-90 percent of the benefits of more frequent training for general health and functional strength.

Each session needs to include compound movements — exercises that work multiple joints and muscle groups simultaneously. Squats, deadlifts, presses, rows, and lunges cover the entire body efficiently. A basic full-body routine takes 30-45 minutes. The key is progressive overload: gradually increasing the weight, reps, or difficulty over time to continue stimulating adaptation. Stephen Jepson's approach of varied physical challenges achieves this naturally through play.

"The resistance that you fight physically in the gym and the resistance that you fight in life can only build a strong character." — Arnold Schwarzenegger

4. It Is the Best Exercise for Metabolic Health

Strength training improves insulin sensitivity, reduces visceral fat, lowers blood pressure, improves cholesterol profiles, and reduces the risk of type 2 diabetes — often more effectively than aerobic exercise alone. Muscle tissue is metabolically active, burning calories at rest. More muscle means a higher resting metabolic rate, making weight management easier.

A 2022 meta-analysis in the British Journal of Sports Medicine found that muscle-strengthening activities were associated with a 10-17 percent lower risk of all-cause mortality, cardiovascular disease, cancer, and diabetes. This benefit was independent of aerobic exercise — meaning strength training provides unique protections that cardio alone does not. The combination of both is ideal, but if you can only choose one, resistance training offers the broadest health benefits.

The Bottom Line

Strength training is not optional for healthy aging — it is essential. It preserves muscle, builds bone, protects metabolism, and extends independence. Two sessions per week of compound movements is enough to capture most of the benefits. Whether you use barbells, dumbbells, machines, or your own bodyweight, the important thing is that you start and stay consistent.