What Is the Latissimus Dorsi Muscle? The latissimus dorsi is a large muscle covering your back. You may know it as your lats muscles. They're connected to many parts of your body, originating from ...

You might have heard of trainers or your doctor refer to your latissimus dorsi muscle, or “lat” for short. This large muscle in the back of the upper body does a lot of work during everyday movements, ...