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Muscle Contraction
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Muscle Contraction
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Muscle Contraction
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Muscle Contraction
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Arm Balloon
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Muscle Contraction
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Muscle Contraction
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Muscle Contraction
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0:42
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Which matters more for muscle growth: the positive, where you lift the weight up, or the negative, where you lower the weight back down? For years, most lifters assumed that the negative was more important because that’s when the muscle is lengthening. And you’ve probably heard science-based lifters say that it’s really important to ...
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