Did you use machines, or barbells/dumbells?

I find machines hyperfocus the training on specific muscles, but take away most need for stabilization. They can also cause RSI-like effects by constraining you to one and only one movement path.

With barbells (or dumbells, or kettlebells, etc.) you have to not only lift the weight but also balance/stabilize it, that recruits and strenthens a lot more small muscles along with the major muscle area you're training.