Special Operations personnel, professional athletes and outdoor guides maintain high levels of physical fitness and individual capabilities because it’s can be the difference between life and death, their career or client’s lives.  The seriousness with which health and fitness is viewed by individuals like this something that becomes part of who they are for the rest of their lives.  Your daily job may not require you to jump out of airplanes, be a world class sprinter or use an ice-ax and crampons to climb a mountain, but your fitness and health should be taken just as seriously.