The term "abdominals" refers to a group of muscles located in the front of the abdomen. These muscles, often called the "abs," play a crucial role in core stability, posture, and movement. They help support the spine and assist in various activities, such as bending, twisting, and lifting. The main muscles in the abdominal group include the rectus abdominis, obliques, and transverse abdominis. The rectus abdominis is the muscle that creates the "six-pack" appearance when well-defined. Regular exercise, such as crunches and planks, can strengthen these muscles and improve overall fitness.