I've cracked my back so much that if I dont crack my back it gets very stiff (Ha!) and decides to ache with pain. So, when I do crack my back, I can feel the blood flow when I do. I dont always do the "Over the counter bend". I sometimes lay on my side and with my knuckles, feel for one to be out of place and I slide or crack it back into place. Which feels amazing. The neck is the same method; as well as my fingers, wrists, ankle, toes, knees, and hips. I do not have any issues with my joints either.