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The abdominal muscles comprise part of your core, including your back and glute muscles. They work together to provide stability and mobility for your spine and support your pelvis. Strong abdominals help ward off back pain and injury. To make the most of your abdominal training, knowing which exercises work best and which are ineffective is wise. Some abdominal devices or movements may even increase your risk of injury. It's also worth knowing where each abdominal muscle is, what they do, and how they can be exercised with the least risk of injury. The most well-known and prominent abdominal muscle is the rectus abdominis. It is the long, flat muscle that extends vertically between the pubis and the fifth, sixth, and seventh ribs. The rectus abdominis connects to the xiphoid process, a bony landmark at the bottom of the sternum. A strong, tendinous sheath called the "linea alba," or white line divides the rectus abdominis down the middle. Three more horizontal tendinous sheaths give the muscle its familiar "six-pack" look in very fit athletes.
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