During long races, many athletes stress the idea of running slower at the beginning and then speeding up at the end. Studies are showing, however, that doing the opposite may be more beneficial. The overall answer seems to be that it depends on what feels right to you, and if you’re trying to work out at your aerobic maximum for as long as possible. A study done at the Inland Norway University of Applied Sciences showed that when athletes worked out at their maximum at the beginning, they hit that point more often in their workout.
The Crossroads of Special Operations