Endurance (also called sufferance)'s the ability for an animal to exert itself for a long period of time. In humans, it's usually used in aerobic or anaerobic exercise. The definition of 'long' varies according to the type of exertion - minutes for high intensity anaerobic exercise, hours or days for low intensity. Training for endurance can have a negative impact on the ability to exert strength unless an individual also undertakes resistance training to counteract this effect. Endurance exer… (More on Endurance)