Pretty much. It's also quite important to strengthen muscles that work in tandem with the knees, get your vitamins, be smart with your running shoes etc. I've g

Pretty much. It's also quite important to strengthen muscles that work in tandem with the knees, get your vitamins, be smart with your running shoes etc. I've gone through my fair share of injuries to ramp up to 100km/week on pavement and had to a learn a new 'trick' every time to get past it and onto the next limiting injury. Also, "if you hurt yourself take a break" is interestingly not always true! Some injuries will basically not improve by resting - patellofemoral pain syndrome for example. For some other injuries, you can still keep going while injured as long as the rate of recovery is greater than the damage you are doing by exercising more. Injuries are not so black and white, and some very painful ones can sometimes be suddenly fixed without taking time off.