HOS-Y053 Inspire AB Bench The abdominal muscles, consisting of the rectus abdominis, internal and external obliques, and transversus abdominis, are located in the front and sides of the torso. These muscles are responsible for various functions, including supporting the spine, maintaining proper posture, and assisting in movements such as bending, twisting, and lifting. Strong abdominal muscles help to stabilize the body during physical activities, reducing the risk of injuries and improving overall performance. Additionally, they contribute to a healthy and efficient digestive system.