The oblique muscles are a group of muscles that run along the sides of the abdominal region. There are two main types of oblique muscles: the external obliques and the internal obliques.
The external obliques are located on the sides of the abdomen and run from the lower ribs down to the pelvis. They are responsible for lateral flexion and rotation of the trunk.
The internal obliques are located just beneath the external obliques and run in the opposite direction, from the pelvis up to the lower ribs. They also help with lateral flexion and rotation of the trunk, as well as with supporting the spine and assisting with breathing.
Both the external and internal obliques play important roles in maintaining good posture and stability, as well as in movements such as lifting and carrying heavy objects. They are also important for athletic performance in sports that require a lot of twisting and turning, such as tennis and golf.