On Sunday, while warming up for my squats (no belt) I felt a cramping like pain in my left rib area while coming out of the hole. It wasn't painful, it was just annoying. It felt exactly like a cramp from running too soon after eating. Needless to say, on my first work-set when i put my belt on, i failed it coming out of the hole. However, i attribute the fail to the lack of sleep, and long hours at work over the weekend. Fast forward to today's work-out. I slept good over past couple days and ate very well. Minor cramping during warm-ups (no belt again), and I was able to get first two work-sets up with belt. The cramping got worse in the later work sets. However, there is no pain when pushing the area with my fingers. I recently got an inzer lever belt (about 2 weeks now) and I've been using it for my squat work sets and deadlift work sets or PR attempts. When i first set it up, it was snug. However, lately its felt much tighter. Is is possible that the belt has become too tight and I may have hurt something? Or is this possibly part of breaking the belt in?