Figure 2. Internal/external rotation and add/abduction moments of the lead knee during downswing for the forward/backward (F/B) and toward/away from the target (T/A) ball positions. BF, BH, R0, FH, and FF stand for the F/B ball positions and TF, TH, R0, AH, and AF stand for the T/A ball positions (see Figure 1). The graphs show the mean trajectories across participants. TP: transition of pelvis, I: impact, F90: club shaft angle of 90° in the frontal plane during the follow-through.