This wall Pilates move will challenge your core stability, Jardine says, as well as fire up your glutes and hamstrings.
Sit about one foot away from a wall, and lie down on your back. Place your feet flat on the wall so your legs are in a tabletop. Press your feet into the wall to lift your hips off the floor so your body forms a straight line from shoulders to knees. (Make sure not to arch your back.) This is your starting position.
Keeping your hips still (without allowing them to tilt or drop), lift your left foot off the floor and draw your knee in toward your chest. Maintain the same bend in your knee, only bending at the hip, and stop when your thigh is perpendicular to your torso.
Reverse the movement to return your left foot to the wall. That's one rep. Repeat with the right leg.