What stretching actually does to your body ft. Sofie Dossi

Great video,and the summary was good. I will add that more mobility in tendons and ligaments is not necessarily a good thing. You need to make sure that you are stretching out the muscles proportionately.  I know people that are hyper-flexible who have had to have their connective tissue surgically shortened because it was not protecting their muscles and joints enough and they were getting injured by that alpha gamma loop not being effective. In other words, the notion that naively increasing your flexibility is good for you is a common misconception, popular in yoga.. I have a friend that owns a scanning company for soft tissue injuries and he says he gets more  business from injuries done in yoga than anything else.