Grab a pillow for balance, and place your left leg straight behind you on the bed with your toe pointed. Bend your standing knee and lean your torso slightly forward. Then, lift up your left leg slowly and bring it out to the side, tapping it briefly back down on the bed before lifting it again and bringing it back straight behind you. Keep your arms tight, and engage the core, butt, hips, and thighs. Perform 15 to 20 reps, then switch sides.