Figure 2. Animations showing (a) the peak internal hip extension moment on the trail leg, and (b) peak internal hip flexion moment on the lead leg, in the same golfer in the mid down swing. Note: in (a) we are examining the golfer looking towards the direction of travel of the golf ball (from right/trail side to left/lead side), while in (b) we are looking back at the golfer away from the direction of travel of the golf ball (from left/lead side to right/trail side).