How to Build a MASSIVE BACK | MUTANT Johnnie O. Jackson

Can anyone match Johnnie O Jackson's training intensity? Johnnie O. Jackson, the world's strongest pro bodybuilder, pumps up his back in this thrilling Mutant training video. Heavy weights are lifted, and heavy weights are dropped, old school bodybuilding style. Buckle your seatbelts because Johnnie is coming with reckless abandon. #MutantNation #bodybuilding #fitness MUTANT Merch & Supps: https://www.iammutant.com/ Connect with us at: TikTok: http://vm.tiktok.com/fTmQ4T/ Instagram:   / mutantnation   FaceBook: https://bit.ly/2m30DNQ Twitter:   / mutantnation