when I can finally relax my back entirely the muscles feel like they're pulsating. my doctor said…

when I can finally relax my back entirely the muscles feel like they're pulsating. my doctor said it's just from pushing, I guess you don't realize how hard you push your body (no pun intended) while pushing. i was too focused to really pay attention to how much I was working my body but now, 5 days later my body keeps reminding me lol