RECTUS ABDOMINIS MUSCLE Meaning and
Definition
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The rectus abdominis muscle is a major pair of muscles located in the front of the abdomen. It is a long, flat muscle that extends vertically between the pubic symphysis and the sternum. Its structure is characterized by a series of tendinous intersections, commonly referred to as the "six-pack" or "washboard abs." The rectus abdominis muscle is situated between the ribcage and the pelvis and is divided into two distinct bellies, one on each side of the midline.
The primary function of the rectus abdominis muscle is to flex the trunk, meaning it brings the ribcage closer to the pelvis, effectively bending the body forward. This muscle is instrumental in various movements such as sit-ups, crunches, and leg raises. Additionally, it aids in posture, maintaining core stability, and supporting the spine.
The rectus abdominis muscle is often referred to as a postural muscle as it assists in maintaining an upright posture and preventing excessive curvature of the lower back. It also acts as a protective sheath, providing support and stability to the internal organs in the abdominal cavity.
The rectus abdominis muscle is commonly targeted in fitness and sports training to develop a toned appearance of the abdominal region. Strengthening and conditioning exercises for this muscle can improve core strength, increase stability, and contribute to overall physical performance.
