Losing strength can sneak up quietly. One day the grocery bags feel heavier, the stairs take more effort, or getting up from a low chair turns into a little project. That isn’t “just getting old.” It may be sarcopenia, which is age-related loss of muscle mass, strength, and function. The hopeful part? Muscle can respond at almost any age. Rebuilding strength may look different at 70, 80, or 90 than it did at 40, but the body still adapts when it gets the right signals: safe m