The obliques are a group of muscles located on the sides of the abdomen. They play a crucial role in trunk rotation, lateral flexion, and stabilization of the core. The two main types are the external obliques, which are on the outer sides, and the internal obliques, found beneath them. Strengthening the obliques can improve posture, enhance athletic performance, and reduce the risk of injury. Exercises like Russian twists and side planks specifically target these muscles, making them essential for a well-rounded fitness routine.