Whenever I do my left leg splits, my hamstring feels tight. I know I am flexible enough to do a full over split on a panel mat with my left leg, however, if I push past a certain point in the split, it feels like my hamstring is popping and a tingling sensation travels down my leg. It is a weird feeling, so it's hard to describe it well. About two weeks ago, the popping and tingling happened and ever since, it feels like I pulled my hamstring. Although this is the first time that I have had lasting pain from this, I have had the same tight feeling in my left splits for two years. This never happens on my right leg splits, only my left. Just wondering if anyone else gets the same feeling and if there is something that I can do to prevent this from happening.