A game ball is instrumented with a transducer to measure the impact forces
on the ball and/or the decelerations by the ball experienced during an
attempted catch by a person. The impact forces on the ball are equal and
opposite to the forces on the hands of a person catching the ball so that
the ball may be used as a training apparatus to teach a person the proper
technique to catch a ball. A preferred catching technique includes
decelerating the approaching ball to rest by the hands such that the
action time of the catch is increased and the resulting force on the
hands and the ball is decreased. Wireless transmission of data from the
ball is sent to a remote receiver in one embodiment.