Fig. 2. Mean vertical force (A) and the vertical impulse (B) applied to the force plate by the six subjects during maximal-effort vertical jumps and maximal-effort jump turns. In the vertical jump trials, the subjects did not attempt to turn. In the jump turns trials, the subjects attempted to turn as far as possible as they jumped. In each case, the three columns represent jumping unencumbered (U), jumping with the control weight (W) and jumping with the increased rotational inertia (I). Values are means ± S.D.