Strength training is the only exercise that combats neuromuscular aging and preserves muscle power—which declines 2-4% yearly after 40, twice the rate of muscle loss. Dr. Andy Galpin explains evidence-based protocols for building strength and muscle using progressive overload, exercise selection, and weekly training volume. People lose 2-4% strength per year after age 40 versus only 1% muscle mass, making strength preservation critical for functional independence and fall prevention as you age.