Review: No secrets here
Rating: 3 out of 5
Date: 01 14, 2013
These methods of isometric holds are well known and go back to ancient history. Moreover, Charles Atlas used them and wrote about them as did many other people into physical culture. And, to be sure, they work. If you've not read all that material or care to do a search on the Internet, you'll enjoy this little report. But there's more info and video available online. Just google Atlas stomach vacuum.-- Susanna K. Hutcheson