bro its resistance bands n stretching...i got it from playing baseball n not adequately stretching b4 batting...but when it happened i went to a physical therapist one time after declineing sugery...n he showed me these exercises to do with bands...n i started doin em when i began workin out...night n day diff...n i got maddd scar tissue like sthat sht usta pop n crack like a mufucker...i was scared it would go frozen tbh...best thing is to stretch n strenghten it (it being sorrounding muscles n stuff...even stabilizers) @
trap