Refusing to go to the gym is not the same as resistance training.
I'm sure the feeling of fear, as long as you can take advantage of it and not be rendered useless by it, can make you extend yourself beyond what you would regard as your capacity. If you're afraid, the blood seems to flow freely through the veins, and you really do feel a sense of stimulation. Edmund Hillary (1919 - 2008 - first man to climb Mt Everest, 1953)
"Are we lost?""No, of course not. I just can't find the track!"