gTummo/ Achieving through spiritual flame, 70 breath method

https://www.scribd.com/read/224365075/The-Genius-of-Flexibility-The-Smart-Way-to-Stretch-and-Strengthen-Your-Body https://www.youtube.com/watch?v=5D_GNWe6jYc&t=173s https://www.youtube.com/user/flexiblestrength https://www.youtube.com/channel/UCVs4Pb1KH-ETaobSBBAg6Sg https://www.thegeniusofflexibility.com/ https://www.lutherbryan.com/training-archive https://www.youtube.com/c/BodyweightWarrior/playlists https://www.youtube.com/watch?v=jj2AAH6jbHk https://www.youtube.com/channel/UClACCYGt2RIdCUM4xBNalIQ

https://www.hindawi.com/journals/ecam/2015/361974/ https://www.hindawi.com/journals/ecam/2015/303769/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3793287/ https://jaoa.org/article.aspx?articleid=2480724 https://www.sciencedirect.com/science/article/pii/S2005290113002082