Hunting, as a sport, runs the spectrum of physical challenge. It can be done from a chair on a front porch with only a slight increase in heart rate just before a shot is fired, or hiking through the mountains in a storm it can be a demanding test of physical strength and cardiovascular endurance. Every year a significant number of hunters enter the field and are seriously injured or die from underestimating the rigors of hunting or overestimating their own physical strength and endurance.