Physical therapists (PTs) help people who are recovering from injuries get stronger. Typically a PT will rotate among a few different clients: She might have one person getting a post-workout massage and another exercising. The PT assistants are there to keep people focused, remind them how to do their routines, set up heat or ice treatments, and report on their progress. Some patients go for weeks at a time, so as an assistant in a private practice you can get to know people really well. (Because of the exercise equipment, it can feel like you're hanging out at a gym.) A hospital setting is more fast-paced, and your patients will likely have more challenging problems—especially if they've just experienced a stroke or surgery. The most satisfying thing about this job is watching people get stronger and more mobile as a result of the care you've given them.