From the low lunge, tuck your back toes under and inhale to raise your torso off your thigh. Keep the same alignment in front foot – knee above or behind ankle, not in front. With your back leg activated, you will be sending the energy out of your heel, puffing up your quads and hamstrings.
You’re working on getting that back leg straight although this may take time (time as in weeks, not minutes) to get there. Again, engage torso, allow tailbone to curl into body to avoid concaving lower spine. Cinch in your side waists to grow taller. Raise arms either side of head (tight shoulders? Open your arms wider) and drop shoulders away from ears. 1.30 mins each side.