A training system for a jumper on a jump path over a crossbar predicts the jumper's flight path and cues the jumper if the flight path is too close to the crossbar or to take action if the jumper is predicted to strike the crossbar. The system includes a sensor viewing the jumper from a direction paralleling the crossbar and producing data points representative of the lowest edge of the jumper in the vicinity of the crossbar. A computer receiving the data points is programmed to determine therefrom the jumper's flight path, the jumper's forward speed, the location of a jumper's lower legs relative to the crossbar, an expected impact time of the lower legs with the crossbar, and a cuing time. A cuing device, such as a horn, cues the jumper to raise the lower legs so as to not impact the crossbar.

A barbell system for enhancing weight lifting exercises is described. The barbell system includes an elongated barbell comprising a first end and a second end. Weights are provided for placing symmetrically on the first end and the second end. A locking device is provided for securing the weights to the bar wherein the locking device has a split collar capable of receiving the elongated bar therein; and a locking device capable of drawing the split collar into engaging relationship with the elongate barbell.