So i was doing some squats this morning, say-- 60, not many. After i was done, i felt a little bit of back pain then i decided to squat again just to see if my posture was wrong, after that it begin to hurt worser. often when i use certain movements involving my back thats when it hurts. I'm 17 but anybody at any age can hurt their back, but thats not the point.
I just want to know what could i have done wrong? any kind of help would be appreciated.