Arm-weight based exercises

To substitute for weights, would using one arm to apply force on my other hand and to try to lift that force be counted as exercise? Basicly it's like a self arm wrestle, but can be adjusted based on my own preferences.

I just wanted to know if it'll work or not, I've been trying different ways to exercise lately like air-punching and stuff. I've been meaning to use my dad's weight sets for exercising, but he attacks me about using them and I never get near them even if I wanted.