Dynamic stretches are active movements where joints and muscles go through a full range of motion. They can be used to help warm up your body before exercising. Dynamic stretches can be functional and mimic the movement of the activity or sport you’re about to perform.
Dynamic stretching is a movement-based type of stretching. It uses the muscles themselves to bring about a stretch. It's different from traditional "static" stretching because the stretch position is not held
Someone who has a broken leg because they will have little to no physical activity and up gaining weight due to taking in more energy then the person is expending