Stand upright, with dumbbells in your hands. Take a long step back with your left foot. Lower your hips so that your right thigh (front leg) becomes parallel to the floor with your right knee positioned directly over your ankle. Your left knee should be bent at a 90-degree angle and pointing toward the floor with your left heel lifted. Return to standing by pressing your right heel into the floor and bringing your left leg forward. Immediately lift the left leg up and back while bringing the upper body parallel to the floor. Keep your chin tucked in and standing leg’s knee slightly bent. Come back to standing to complete the rep.