Lie facedown on the floor with your palms facing down and your arms bent at 90 degrees, like you’re one of the cowering customers during a bank robbery. Pull your elbows down toward your ribs, tighten your core, and lift your thighs and feet off the ground, using your glutes (butt) and not your lower back.
Squeeze your butt as tight as you can, and hold. Extend your arms straight out in front of you while simultaneously separating your legs, keeping your thighs parallel to the floor. Slowly return your arms and legs to the starting position and repeat for a total of 60 seconds.