Side-to-side leg exercising machines are designed to glide laterally, and the exercise movement is similar. Place each foot on a platform, which is attached to a track, hold on to the handrail, push your legs away from each other and glide them back toward the center. Some lateral leg exercisers use pulse-resistance technology to increase resistance to tone your inner and outer thighs. Instead of standing on a gliding leg machine, you can use a kneeling thigh machine. Place each knee on a gliding platform attached to a track using resistance cords, hold on to the handrail and glide your legs away from each other and back together again. Because you are kneeling, the side-to-side thigh gliders are designed to target your hips, thighs, and buttocks.