Description: Music-exercise videos can help patients who've had total knee replacement surgery get more in tune with their rehabilitation program, a U.S. study finds.

Researchers in Michigan created a video specifically designed for patients undergoing rehabilitation after having knee replacement. The video featured an instructor demonstrating exercises and offering reminders about how to do the movements correctly and avoid injury.

In this study of 45 patients, about half used the video during their rehabilitation, while the remainder did the exercises on their own, the norm for most patients.

Patients who used the video returned to their regular daily activities an average of 59 percent sooner than patients who exercised without the video. The patients who used the video also had significantly better knee status and overall function at six weeks and eight weeks after their surgery.

The video significantly improved patients' understanding of the exe