Muscles looking bigger or smaller from one week to the next

ssanj10

Hope this makes sense, butsometimes my shoulders and pecs look quite developed in the mirror. Not just after a workout but often after a few days of going to the gym
Then a few days later they seem to have shrunk again.

Is there something to that, are there certain factors which make this happen like being dehydrated for example or is it all in my mind?? I'd like to know so I can maximise the muscle development

psuLemon

Well you can have swelling that comes and goes in your muscle. Also, change in temperature, carb level, hydration, sodium intake, et.c... can have an effect.