There must be a reason for that don't you think so? IsNO2 BURST  there something they knew about flexing their muscles and posing that you don't? Yup. Spot on. They know what Isotension can do to their muscles.What is isotensionIsotension, when incorporated into your weight lifting routine, can help you to get that 'ripped defined musculature' appearance with muscle cuts, clear vascularity and striations visible. Many professional bodybuilders swear that isotension is one of the best way to increase your muscle hardness and definition.What is isotension?

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