One of the most useful core exercises you can do is the stomach vacuum.
Contrary to its name, a stomach vacuum is neither a medical operation nor a chore. In reality, the physical therapy and bodybuilding industries have been using this particular sort of abdominal contraction for years...
The Stomach Vacuum Exercise
By Karen Sessions
Last updated: Apr 10, 2015
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I can teach you a simple technique to reduce your midsection in as little as 3 weeks. By incorporating this technique, with your regular abdominal training, it will give you a carved midsection!
The vast majority...
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