Even if you don't have a slider at home, you can do these on a hard surface placing your foot on a towel, or on carpet using the slick side of a magazine. It's that easy to tone up your hips and glutes with this move.
Place the slider (or other tool) under the ball of your right foot.
Slowly and with control, ease your right foot out to the side with a straight leg, going as far out as you can but making sure you can bring your leg back easily.
Try to keep your weight centreed on the left stationary leg as you take the leg out and back for one rep.
Complete 10 to 15 reps and switch to the other side. Do 3 sets on each leg.
The lower you drop your hips, the more you will feel this.