Intense eastward facing stretch combines upper body extension with a lift of the pelvis to lengthen the front of the body and strengthen the entire posterior chain. Purvottanasana offers an opening of the heart by lifting it high and allowing our chest to reach for the sky. The focus in this posture should be lifting your back against gravity and will require strength, patience and practice. Often times people do too much lumbar extension and not enough hip extension. The hamstrings should be the main extensors for the front hip joint, but if they’re weak the tush kicks in. The problem with that is when people squeeze their tush the hips want to go into external rotation (lateral rotation) make sure to watch out for this!