? Watch our Best of videos playlist http://bit.ly/2QiCD6z ? Subscribe to our channel http://bit.ly/2Nx4u01 Back extension / Hyperextension ( lower back exercises ): this exercise is vital to strengthen the muscles of the lower back, the lumbar muscles. The back muscles are antagonists of the abdominal muscles, for these reasons we recommend to train in proportion to the abdominal muscles is that the back muscles. (electronic translation of the text) http://www.passion4profession.net/en/ P4P is asking all of its subscribers for help to continue producing increasingly high-quality multimedia content, thus providing ever-more useful services that are completely free. How can you help P4P? In just 4 simple ways: 1.Vote for the video by clicking “Like” 2.Add at least one comment 3.Add the video to your favorites 4.Share the video on Facebook/Twitter -~-~~-~~~-~~-~- Please watch: “Chest workout – best home routine to kill pec muscle calisthenics and bodyweight” https://www.youtube.com/watch?v=ImNFOaCcWZs -~-~~-~~~-~~-~-