Training hard to be better at your tennis game is one thing. Training intelligently is another. To help you optimize your performance on the courts, you should get one of these tennis sensors sold at YouPoundit. These sensors, such as the Qlipp, helps you collect data such as serve speed or the angles of your strokes. You can even record a video of your performance. That way, you won’t have to rely on guessing which parts of your game need improvement. With the right data on hand, you can train smarter and play better.