Main muscle: lower-back
Other muscles: quadriceps, hamstrings, abdominals, glutes
- Stand with your feet shoulder width apart. This will be your starting position.
- Perform a rear lunge by stepping back with one foot and flexing the hips and front knee. As you do so, rotate your torso across the front leg.
- After a brief pause, return to the starting position and repeat on the other side, continuing in an alternating fashion.