system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What happens to your muscles during and after a massage?
gpt
Your muscles can get stuck "on" from overuse or say poor posture, a massage therapist will work to find the off buttons to turn them back "off" again.  

Going further, your muscles have a layer in between your skin and your muscle that gets bunched up over time, like a bed sheet under a blanket.  A good massage therapist will work to smooth this layer back out again allowing muscles to move freely under your skin.