I do bouldering and I eat fast food multiple times a week, I can definitely outclimb my poor diet... I probably helps that I don't eat breakfast though...
It's well known though that as you build muscle, your rest calorie consumption increases, so probably if you build/maintain enough muscle, then you can just outrun your intake, since you consume more without doing anything to start with...
It's well known though that as you build muscle, your rest calorie consumption increases, so probably if you build/maintain enough muscle, then you can just outrun your intake, since you consume more without doing anything to start with...