There are several physical therapy apps for the watch that aide in tracking/timing PT exercises from a patient perspective. If you had an apple watch and were familiar with these apps, you could help your apple/smart watch wearing patients use these apps to extend their care outside your office. Like other devices, an Apple/smart watch is another tool to be used how you see fit. How far you take it is only limited by the functionality of the smart watch brand, app, and your imagination.