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 ...

Strong core muscles are the secret to an injury-resistant and robust body. Not sure where to get started? Here’s where we come in. You don’t need any equipment to do this abs workout, but you might ...