Another exercise you can add to your workouts for a stronger core is the bird dog, according to Kira. "It's important to squeeze the glute of the extended leg while holding this position," she explained.
Get on all fours, with your knees under your hips and your hands under your shoulders. Remember to keep abs engaged and keep your back flat.
Reach out with your right hand and extend your left leg out behind you.
Round your back and head to connect your right elbow with your left leg under your body. This completes one rep.