Seung Soo Lee
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The psoas major and the rectus abdominis muscles have an important relationship inside the body even though they don’t literally work together. Muscles relate to each other in many different ways. Sometimes they work in opposition—for the hamstring to lengthen the quadriceps must shorten. This happen through the process of reciprocal inhibition and most often occurs ...

The psoas major and the rectus abdominis muscles have an important relationship inside the body even though they don’t literally work together. Muscles relate to each other in many different ways. Sometimes they work in opposition—for .