New answers tagged arms
You likely experienced 'The Pump' - i.e. a temporary swelling of a well-used muscle due to additional blood-flow. It can last for several hours, but after the 12 hour period since your workout, it certainly could have faded. It's completely normal - don't worry too much about small changes to muscle-size.
No. At least not in 12 hours. Over long periods of time an "ex-bodybuilder" who isn't active, eats too much junk, and lacks sleep may notice fat covering up their muscles, but the muscles still probably won't shrink.
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