Ok I'm not here to push any rules, so I'm sorry if I'm doing that with this thread BUT I think I was misunderstood. I'm not talking about some kind of sharp pain like I'm risking injury... I'm trying to stretch my hamstrings to INCREASE the length of the muscle. Now I'm not sure if you all are yoga masters or were just born extremely flexible but in my experience stretching ANY muscle is always associated with some pain.. a pulling apart pain that could be described as some sort of heat. The problem for me is that my hamstrings are much tighter than any other muscle on my legs... I can apply fairly intense stretches to other muscles and still tolerate the pain of stretching (I can breathe through it and feel the muscle relax and begin to lengthen after about a minute) but I've always had a problem doing this with my hamstrings. So: I am wondering if anyone else has experienced this problem with short hamstring muscles, and if they found a way to work through it.