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napsgear
genezapharmateuticals
domestic-supply
puritysourcelabs
Research Chemical SciencesUGFREAKeudomestic
napsgeargenezapharmateuticals domestic-supplypuritysourcelabsResearch Chemical SciencesUGFREAKeudomestic

do stomach vacuums work?

Stomach vacuums train your adverse abdominals (the abdominal wall underneath your 8 pack)

Stomach vacuums and planks are fantastic for keeping the midsection tight
 
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