Hip flexors
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Image:Gray1076.png In human anatomy, the hip flexors or iliopsoas are a group of muscles passing through the pelvis that act to flex the hips and rotate the lower spine. Lying deep within the torso, these are some of the least known skeletal muscles, and their action is often confused with that of the rectus abdominis muscle. For example, even though the sit-up is used as an exercise for the abdominal muscles, it actually works the hip flexors. The hip flexors include:
