I have a mobility issue with my hamstrings and am unable to completely straighten my legs. Maybe it is not my hamstrings, butI do feel it is tight there and my leg locks at about 170 degrees when trying to stretch it against a vertical bar with my back on the floor.

For the past few months I have been doing some pretty focused mobility exercises to straighten them out because lack of flexibility is holding me back in my cross fit training.

I do not know what has caused this, but suspect it is either from decades of rigid exercise with no concern for stretching or lack of exercise period. My career has been a desk job as a software developer. It could also be caused by a few months of lots and lots of running earlier in the year. I have a PT roller and use it on my upper body daily, but not so much on lower body. Mainly because I do not know how to do it without being uncomfortable. On my back, it is the best massage ever and really deep.

Do you know some really good lower body flexibility exercises that are going to fix this issue? Or a supplement? I already do most of the standard hamstring stretching exercises and do take 2-4 g of very high quality fish oil daily. Any good books on how to fix flexibility issues perhaps focusing on lifting. I have the same problem in my shoulder where my arm will not straighten when doing heavy lifts over head. I am strong enough, but body will not stay straight.

I really want to be hyper flexible!!! That would make some lifting activities so much easier.

Let me know how it goes, I am totally obsessed with yoga :-D