Progressive muscle relaxation is a technique that helps you relax by tensing and then slowly relaxing different muscles in your body. The idea is to focus on each muscle group one at a time, like your fists, arms, shoulders, or legs. You tighten each muscle for a few seconds, then let it go and notice how it feels to relax. This process helps to reduce stress, improve relaxation, and make you more aware of how your body feels, which can also help with sleep and managing anxiety.