Why Strength Is the Foundation of Health in Midlife (And the Research That Proves It)

Many men in their 40s and 50s rely on cardio workouts, circuit training or HITT classes to stay “fit enough.” Take Mark, a 50-year-old who jogs a few times a week and does body-weight circuits occasionally. He figures that as long as he keeps his weight in check and his heart pumping, he's healthy.

But recent science suggests a missing piece: building and maintaining muscle strength.