Definition
Strength is the ability of muscles to produce force. It is fundamental to independence, injury prevention, metabolic health, and mood — and it is preservable and buildable into late life.
Why it matters
Age-related strength loss (sarcopenia) is a major public-health issue. Strength training remains one of the most effective interventions across the lifespan.
The Science
Progressive resistance training produces neurological and structural adaptations, improving strength, function, bone density, and metabolic markers in nearly all populations.
The NSI Perspective
NSI treats strength as neurological and structural — both. It is not vanity work; it is fundamental function.
Clinical Implications
Strength training should be prescribed across ages, not reserved for athletes.
Practical Application
You are never too old to get stronger. This is one of the more consistently established facts in exercise science.
References
- 1.Fiatarone MA, O’Neill EF, Ryan ND, et al. Exercise training and nutritional supplementation for physical frailty in very elderly people. N Engl J Med. 1994;330(25):1769–1775.