Do you have some tennis balls lying around your home? Dig them out and you can use them to mobilize your upper back, strengthen these hard-to-train muscles and correct poor posture with this novel ...

There are a lot of ways to work out with a ball in the gym. You have the ball sports—soccer, basketball, tennis, to name a few. Then, there are medicine balls, BOSU balls, and stability balls. They ...

It was just this past week that we told you about the T-Apex, a mobile tennis-ball-serving robot that tracks and assesses players' returns. Well, the Acemate bot goes a step further, by actually ...

Forbes contributors publish independent expert analyses and insights. Tim Newcomb covers tennis gear/business, stadiums and shoe tech. Thirty-seven square inches isn't a generous amount of string ...