Originally Posted by timmhaan
excellent question. i've wondered this myself. i don't have an answer for you - but i can say it started for me about 5 years ago. i "pop" it on average once a day and haven't had any problems. it feels kind of good in a way. hopefully someone has some input on this, because i'm very curious myself.
Wow this is great I thought I was some kind of freak because my sternum popped when I did a big stretch. Glad to know I am not the only one. We should start some kind of support group.
