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

isometric

  1. N

    Isometric vs. isotonic contractions?

    What is gonna be more effective to building mass quickly if you have to choose between isometric vs. isotonic contractions? Can you give me examples of which one would be better when it comes to bicep exercises for example and what would also be better on a day that your muscles are more sore? I...
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