Mistake 2: Training your arms every day
No body part grows by trashing it every day—you need to rest to let your arms recover. In the hours after a workout, your muscles lose strength and power as they heal; after 36–48 hours, the muscle actually gets stronger, a process called “supercompensation.”
Bottom line: You need to give yourself rest. That’s especially important for your arms, which are tiny compared to other muscle groups like your legs or back, and therefore can’t handle as much stimulus.
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