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 ...

"In terms of the impact, it's a blip on the radar. ... And there are things you can do to reuse and repurpose tennis balls to lessen the impact." Among them are efforts by nonprofits and others to ...

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 ...