Sprint (running)

Sprinting is running as fast as possible over a relatively short distance and period of time. It involves the whole body working as one in order to produce maximum forward thrust through a series of sprinting strides which are taken as quickly as possible. It is used in many sports that incorporate running, typically as a way of rapidly reaching a target or goal, avoiding or catching an opponent, or intercepting a ball.

In athletics and track and field, sprints (or dashes) are races over short distances. They are among the oldest running competitions, being recorded at the Ancient Olympic Games. Three sprints are currently held at the modern Summer Olympics and outdoor World Championships: the 100 metres, 200 metres, and 400 metres.

At the professional level, sprinters begin the race by assuming a crouching position in the starting blocks before driving forward and gradually moving into an upright position as the race progresses and momentum is gained. The set position differs depending on the start. The use of starting blocks allows the sprinter to perform an enhanced isometric preload; this generates muscular pre-tension which is channeled into the subsequent forward drive, making it more powerful. Body alignment is of key importance in producing the optimal amount of force. Ideally, the athlete should begin in a 4-point stance and drive forwards concurrently pushing off using both legs for maximum force production. This initial forward thrust is asymmetric in nature usually meaning that the rear foot is lifted sooner while the front foot continues to push off from the front plate. As they come up from their low stance and their posture becomes increasingly upright they continue to thrust forwards in the direction of travel.

Athletes remain in the same lane on the running track throughout all sprinting events, with the sole exception of the 400 metres indoors. Races up to 100 metres are largely focused upon acceleration to an athlete's maximum speed. All sprints beyond this distance incorporate an element of endurance.