Make the Most Out of Cardio With These Expert-Recommended Core Exercises

A plank with pelvic rotation, sometimes called planks with hip dips, also works all four abdominal muscles, while emphasizing the obliques — the muscles around your waist.

• Lie face down on the floor with elbows propped under the shoulders (sphinx position).
• Pull navel into spine and lift the rest of the body up so you are resting on your elbows and toes.
• Push back through the heels to activate the legs and keep the navel into the spine throughout.
• Lower right hip down to ground approximately one to two inches by rotating in the lumbar spine, then repeat on the opposite side.
• Repeat 20 times each side.