My cousin is having some shoulder issues and emailed me for any advice I could give. She said that she’s getting stronger but she can’t actively complete her full range of motion by herself. That’s ok, she will. But for right now, those motions must be performed passively until she can do it on her own. This is incredibly important because if the arm is not taken through those ranges every day, the muscles will shorten and she will permanently lose that range of motion. Passive range of motion is easy. This is what I told her to do. The first 2 minutes of that video are really boring and you don’t have to watch. In the video, the guys says to stop moving the arm when you feel a stretch. This is called end feel. Whenever you’re passively moving something and you get to the end of range of motion and feel resistance, that’s called the end feel. There are all kinds of different end feels. With muscles, you’ll have a springy end feel. This happens when you’re stretching soft tissues and there is a little give at the end. A bony end feel is what it sounds like. Bone on bone. An example of this is the elbow. When straightening out the elbow (if full range of motion is there) the motion is stopped because the forearm bone runs into the humerus. There are more end feels.