Rectus abdominis muscle
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The rectus abdominis, also known as the "abdominal muscle" or simply better known as the "abs", and sometimes informally referred to as the "six-pack", is a pair of segmented skeletal muscle on the ve
Muscles of the trunk
Male athlete with a visible rectus abdominis
Female athlete with a visible rectus abdominis
Crunch (exercise)
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The crunch or curl-up is an abdominal exercise that works the rectus abdominis muscle. Crunches use the exerciser's own body weight to strengthen muscle and are recommended by some experts, despite ne
Rectus abdominis muscle
…the side of the xiphoid process. The rectus abdominis is an important postural muscle. It is responsible for flexing the lumbar spine, as when doing a crunch. The rib cage is brought up to where the pelvis is when the pelvis is fixed, or the pelvis can be brought towards the rib cage (posterior pelvic tilt…
Performing the crunch