This exercise will sculpt your arms and strengthen your core. Use dumbbells with handles that are raised high enough so that your knuckles don't rub against the ground.
  1. Start in full push-up position (legs extended behind you, abs engaged, back flat), with a dumbbell in each hand, palms facing each other, hands directly under shoulders.
  2. Bend elbows, keeping arms by sides, lowering chest toward floor.
  3. Extend arms to return to start.