You can build your back and biceps using a medium-heavy set of weights like the best adjustable dumbbells and progressively ... 5 lbs and 25 lbs each in 5 lb increments. They come with a storage ...
There's lots of gym equipment that can help, but you can simplify your approach and work with just a pair of dumbbells ... you own your own set of the best adjustable dumbbells, you are all ...