There is a layperson and legal definition for this question.  The short, legal answer is that physical therapy is physical medicine treatment provided by a physical therapist.

But the answer most laypeople are seeking is that physical therapy is a variety of physical and passive means of treatments for the human body.  These can vary widely to include post-operative rehab, to stroke recovery, to exercises, and more.  At Backstrong clinic, we specialized in the treatment of neck and back problems.  This includes arm, shoulder, hip and leg pain that often arises from neck and back problems.