Three, and sometimes four, bands of connective tissue called the tendinous intersections traverse the rectus abdominus, which separate it into six or eight distinct muscle bellies, respectively. The appearance of these segments has led to the rectus abdominus also being called the “six-pack.”
Muscles in the body are either all engaged or not engaged at all. Unfortunately, there’s a lot of misinformation about abs. What is the biggest myth? That you can target working out your upper and lower abs independently.
The rectus abdominus is one single muscle (see image) – it just has some fibrous tissue separating the sections so that it gives a look like it’s more than one muscle. Sure, there appears to be an upper and lower section, but that’s just it. There are other muscles that make up our core, but let’s keep the focus here on the abs.
We have been inundated with late-night and day-time infomercials that tell us some random product will help us “work out those hard to reach lower abs” or other some such nonsense. Why is it nonsense? Due to the all-or-none law, which I briefly mention in the first paragraph, the entire rectus abdominus is engaged or it’s not. This means that there are no such things as upper or lower abs!
If you want that six or eight-pack look, it’s not going to be achieved by ordering some product on TV. You are doing to do so by focusing on your diet to remove the layer of fat that sits between the muscle and your skin. Don’t get me wrong, you’ll need to tighten up that muscle as well, and work it out like any other muscle in your body! But targeting non-existent upper or lower abs is false. Do exercises that work out your abs a few times a week, but most importantly, work on your diet.