Most people stretch improperly and yes it is one if the leading causes of injury . I don't say things that I haven't learned in my 40 years of life and study but if you want foot notes then that's your issue not mine . I should also point out that research and the media isn't always correct as studies are flawed and media is hyped. Most of us that live this life and have been on this earth - know that in bodybuilding as in martial arts etc. mainstream publics idea is far behind even with research and yes covsidering yoga has been around for 1000 s but again you know nothing about it so it sounds foolish of you to offer it. The Chinese do their versin called chi gong , tai chi - moving chi gong all the energy meridians that western science can barely measure never mind explain . Which makes your point look even more off. Now I on the other hand have trained all over the world - yoga, chi gong , judo jujutsu Kung fu, Kali , Silat I could bore you even more with the 18 schools I teach and have learned , but that is my life and passion bodybuilding is part of survival part of health keeping me strong and healthy to train. During my several surgery rehabs particularly my spine reconstruction 1995 stretching was barely part of my rehab. Nor was doing ab work like most outdated places use for old hags. Weights building muscles of my spine - New England baptist hospital at the time was pioneer and top of spine procedure on planet earth. Go google that mimsy ! In fact I had gone to 8 places that did nothing for me so upon a rerun visit to my orthopedic surgeon he insisted I go to his place for rehab because all the other PT places had no idea if current research . You obviously read the sane nonsense the other places do . Next time use your own experience and if you have none then have some class and ask politely ill share, I'm not greedy