Begin either on your hands and knees (or your toes if you're more advanced) on the floor or with your hands on the edge of a coffee table, your hands slightly more than shoulder-width apart in front of you, fingers facing forward. Lower your hips until your body forms a line between the top of your head and your knees (or feet). Inhale and lower your torso toward the floor until your elbows are bent at about 90 degrees. Exhale and straighten arms to bring torso back up to starting position. Repeat for reps.