What's the best physical therapy for an upper quad muscle injury?

Quad injury. Initially for any injury you want to ice, rest and elevate for the first 24-48 hours. Add in nsaids like ibuprofen. Once pain has diminished, start gentle stretching of the quads - after injury we tend to get tight b/c of disuse. After a week, you can add in isometric exercises: wall sits are great. Gradually increase strength exercises w/ weights and squats to prevent reinjury. Good luck!