That's great, Catrin. This becomes more reinforcing as you get older, believe me. A big part of this is knowing when to rest and how to modify, just as you have. I've had pressure from some of my fellow boot camp people and a sly comment from the instructor I like, that I should use another riser when we use the step, whether it's for jump ups or just any step move. But I know that I'd probably trip and kill myself and also that my achilles would be screaming. Maybe eventually, but right now I'm happy with what I am doing.