The concept of motivation from a psychological stand point involves a sort of push-pull situation. When we are motivated by psychological or physiological needs we are pushed toward a specific goal. The goal usually involves some sort of incentive which pulls the person toward it. Parkour, a sport which involves moving from point a to point b in the most efficient manner, is full of motivational examples. One might have a physiological need to become more physically fit, or a psychological need to fit in with a group of sport oriented friends. These motivators would probably couple with an incentive of becoming better at the sport, or finally being able to perform a specific movement like a backflip.