I'm not sure how long I've been popping for, never really focused on that. I did it subconsciously until a friend pointed it out. Then i became obsessed. I can pop: my neck, shoulders (but now only sometimes because it won't pop), back (same as shoulders), elbows (same), wrists (rarely pop), fingers, hips, knees (one of my favorite ones now because it's the loudest, best feeling pop), ankles (I wish they'd pop more), and toesies. anytime I pop the best ones it doesn't work and I end up just hurting myself. And after i get them to pop, it goes back to hurting and needing it again.