This.Hahaha truth. My buddy does crossfit now just to switch things up and he says alot of them think that crossfit is much harder than regular gym training. Well without any previous crossfit "training" I just did one of their harder workouts.
Although I thought it was hard. I rarely do training like that, and I'm not in great shape. But I'll never be as sore as I would be with regular lifting/HIIT training.