Overview: This exercise works both the adductors and abductors, but the kickback targets the glutes. To add difficulty, use ankle weights.
Get Ready: Stand to the left side of an aerobic step or box.
Go: Step sideways onto the box with your right leg only, then contract your abs and squeeze your left glute as you bring your straight left leg behind you in a kickback motion. Hold for one count, then release the glute and step carefully off the box with your left leg, followed by your right. Repeat for reps, then switch sides.
Kim’s Tip: “Be careful not to spring up. You don’t want to get a bounce motion in there. You’re isolating the squeeze-hold and the step up to make sure you’re not using your calves.”