One Arm Rollouts: Two Birds One Stone 1 Arm Rollouts are a great advanced anti-extension/anti-rotation progression. They are as challenging on the shoulder as they are the core and are a great assistance exercise if you want to also learn 1 Arm Push-ups. @kev_in_carr @fitbit @bodybyboyle @menhealthmag #keepmoving A photo posted by Movement As Medicine (@movementasmedicine) on Feb 7, 2015 at 3:17am PST