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Anonymous
>>174875 You're actually going in the same direction as gravity. But you don't want to go in the same direction that fast, so you're generating force to slow you down. To do this certain muscles will elongate because the external force (gravity) is bigger than the intenal force (muscles). This is called eccentric contraction. It's not harder on your joints etc. You're actually stronger when using this type of contraction. It's just that this type of contraction will cause some more damage to your muscles, which can lead to muscle soreness. But this isn't as bad as it sounds, it'll be repaired in a few days.
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