During the last two classes at the Ottawa Taichi Chuan Association, John Dahms explained to his Chen Style Taijiquan Practical Method students the nuances of the relationship between the torso and the legs. The gateways between the two (upper and lower body) are demarcated by the inguinal creases. How to allow energy to pass through (for balance and power) while also allowing maximum rotational freedom of the torso is a seemingly insurmountable challenge to conquer.