Meet the Bullworker: a 20″ steel bow that serves as a portable isometric gym to work your chest, back, arms, and abs anywhere. It comes with 3 interchangeable springs. The resistance is adjustable from 0 to 100lbs while the whole unit weighs 3lbs.
More gadgets like this ➡️ : here
*some of our articles have aff links. Please read our disclaimer on how we fund Exxponent.