There are lots of great posts/threads if you do a search function in the recruiting topics. Basically surviving injury free is a combination of luck, fitness, safety, team work, leadership and staying out of trouble. You will find some topics or posts in Army.ca that discuss "no pain, no gain". Being someone who has 20+ years in the CF, including 14 years of running in combat boots in the field, jumping on and off trucks and tracked vehicles, I have bad knees and even worse ankles from 20 or more sprains. Recovering from injuries is the key, the Battle Fit Tests and marches certainly don't get any easier when you are over 40 years of age.