You never want to strength train the same muscle groups two days in a row, in general. Your muscles, once you tire them, need adequate time to repair themselves (THAT is what causes muscle gains...the muscles tear and then repair). If you worked them yesterday, wait until tomorrow at least to do them again.
There is nothing to prevent you from strength training other parts, though, if you still want to get some in - just not the same groups as yesterday.
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should I rest my muscles?
