Tuning into the U.S. Open tennis tournament? Then you might be wondering exactly how far does a professional tennis player actually run during a match? It sure looks like a lot of work chasing balls ...

You can plug in your phone, download an emulator, or install the Google Play Store to access Android apps on your computer. Some tinkering may be required.

Ready to ditch the “just tracking steps” vibe? Modern running watches do much more than measure run distance and heart rate: They can help you dial in your training, map out epic runs, and even ...