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

resistance

  1. A

    Contracting the muscle

    when you are working out is it necessary to always contract the muscle at the peak. Meaning do I have to squeeze really really hard and then slowly release back down when I am resistance training can you explain to me the science of why you believe or not believe this
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