Work Backpack

Work Backpack
Can a substitute for a backpack weigh?

Just wondering … trying to do some bicep exercises, but also broke a set of dumbbells, haha. A backpack would work, and if so, how heavy I do for a beginner like me? If not, what alternatives might suggest? Thanks a lot!

Of course. Anything with weight, such as canned vegetables and jugs of detergent, will act as a dumbbell.