1b. Squat Into Lunge
- Squat down on your right leg, left toes just touching the floor for balance.
- Without standing up, move your left leg back into a lunge.
- Keep your right leg bent and return your left leg to starting position.
- Do 15 reps, then repeat on the other side.
Tip: Don't ever fully stand. The key is to keep the standing leg engaged and burning, says Erin.