Begin with your feet hip-distance apart. This is the starting position.
Keeping your shoulders relaxed and your back straight, step your right foot forward, coming into a front lunge with your right knee directly over your right ankle. Your left knee will be at a 90-degree angle hovering just over the floor.
Step your right foot back, returning to the starting position, and immediately step your right foot out laterally, extending the left leg, coming into a side lunge with the right knee aligned with your right ankle.
Step your right foot back, returning to the starting position, and immediately step your right foot behind you, coming into a reverse lunge, with the left knee directly over your left ankle.
Step your right foot forward, returning to the starting position. Repeat the three-way lunge with your left leg, lunging forward, laterally, and behind you.
Complete 30 seconds of three-way lunges per leg.
Rest for one minute. Complete circuit one once more, then rest for two minutes before starting circuit two.