The rate of speed determined by distance and performance of an athlete is known as speed endurance. Speed endurance training is conducted to ensure the maintainence of an optimal speed during a prolonged desired time of the run. It is beneficial for both sprinters, and long distance runners.
Answer:
Tomorrow
Explanation:
The one-word answer to this simple riddle is 'Tomorrow'. Tomorrow never comes, but people always push back their plans and say that they will "do it tomorrow". So tomorrow is always coming but it never actually arrives.
