A doctor has shared a simple exercise he claims helps tighten and flatten your stomach - and it's not sit-ups. Taking to his YouTube channel, which boasts 13 million subscribers, Dr Eric Berg DC ...
This move also works the rectus abdominis, as well as the upper abs and obliques, giving a nice rounded workout in one fairly simple manoeuvre. Lay flat, rise into a crunch and ensure the back of ...
A doctor has shared a simple exercise he claims helps tighten and flatten your stomach - and it's not sit-ups. Taking to his YouTube channel, which boasts 13 million subscribers, Dr Eric Berg DC ...
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