Forget endless crunches. After 50, the real secret to a flatter, stronger midsection is training on your feet — where your core actually works the way it was designed to.

Forget the stereotypes of gentle stretching; by shifting your focus to power sequences and active resistance, yoga becomes an elite tool for fat loss and muscle hypertrophy.

Stand tall and then step back with one foot, with your heel lifted. Keeping most of the weight on your front foot, bend both ...