Medically reviewed by Amy Kwan, PT Variations of planks include dolphin, caterpillar, and one-legged planks.Planks help strengthen your core, which improves your balance and posture.People with ...

In the realm of body contouring, planks reign supreme. After all, what other single exercise can challenge your abs, buns, thighs, shoulders, and triceps all at once? Those benefits come from ...