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The Stomach Vacuum: What It Is, Benefits, & More From Bodybuilding Experts

In 1979, bodybuilder Frank Zane made physique sports history when he struck a now-iconic pose on stage at that year’s Mr. Olympia (history buffs will recall that Zane won that competition), captured at the exact right moment by his wife, Christine.  Sure, Zane looked great under the lights, as he always did. But a large part of why…