Though most people just think about the abs that are visible when a person has a six pack, there are actually four different sets

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Though most people just think about the abs that are visible when a person has a six pack, there are actually four different sets

Though most people just think about the abs that are visible when a person has a six pack, there are actually four different sets of abdominal muscles that work together to support your stomach and back. The rectus abdominis muscles are two sheets of muscle that run from the pelvis to the ribs, and these …

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