Lateral muscles are a group of muscles located on the sides of the body. They play a crucial role in movement and stability, allowing for actions such as bending and twisting. These muscles are essential for activities like walking, running, and maintaining balance. In humans, the most notable lateral muscles include the latissimus dorsi and external obliques. The latissimus dorsi helps with arm movement and back extension, while the external obliques assist in trunk rotation and lateral flexion. Strengthening these muscles can improve athletic performance and reduce the risk of injury.