Deadlifts are one my favorite exercises for the lower back, glutes and hamstrings. For a real challenge, try them one leg at a time...but only after you've mastered traditional deadlifts. Do it right: Prop one foot on a chair (easier) or ball and hold weights in front of thighs. Keeping back flat and shoulders back, tip from the hips and lower weights to mid-shin. Squeeze butt and hamstrings to raise body back to start. For more lower body moves, check out this Short Lower Body Workout.