A tennis ball and 30 seconds may reveal how well you’re aging and if you’ll live to 100. Here’s exactly how to do it.

Do you have some tennis balls lying around your home? Dig them out and you can use them to mobilize your upper back, ...

Grip strength measures the force you exert with your hands when holding or squeezing an object. Weaker grip strength is often ...

The next time you hold a perfectly manufactured tennis ball in your hand and think about launching it over a fence in anger, kindly reconsider, because these babies were made with love.

Tennis balls are made up of a hollow rubber core and a wool or nylon shell known as the nap. In tournaments they must be white or yellow in colour. The rubber core is usually filled with pressurised ...

Here, vibration to the hand is a minimum. Vibration is produced when the ball ... 8 The fundamental construction of a tennis ball has not changed for many years. In essence, a spherical shell—known as ...