HOW: Start in a tall plank position, then step your left foot forward and to the outside of your left hand. Sink into your left hip as you keep your left knee pushed out, right leg straight, chest up, and shift your weight forward. Return to starting position and perform on the other side, then repeat.
FEEL: You should feel a butt and groin stretch on the foot that you take a step forward with as well as a hip flexor and groin stretch on the back leg.
COMPENSATION: Do not excessively round your upper back, try to keep your chest up and head looking forward. Watch the video for other tips and details.