Aim: To examine the pre- and post-impact ... 0.002), ball speed and side (p = 0.011) and muscle and side (p = 0.001), as well significant main effects for muscle (p<0.001), speed (p = 0.035) and side ...

The tip of the racquet moves at nearly 120 mph, though at the point of impact ... the ball (a phenomenon known as the Magnus effect) to make it nose-dive into the service court. A tennis ball's ...