Answer :
A 1500-meter runner cannot maintain the same speed over 1500 meters as a sprinter can over 400 meters due to differences in energy systems and physiological demands.
The 400-meter sprint is a shorter distance that requires primarily the anaerobic energy system, which relies on the immediate breakdown of stored energy sources, such as adenosine triphosphate (ATP) and creatine phosphate. This energy system provides quick bursts of high-intensity power but can only be sustained for a short duration.
On the other hand, the 1500-meter race is an endurance event that relies more on the aerobic energy system. The aerobic system utilizes oxygen to convert stored carbohydrates and fats into energy. It is more efficient for longer durations but has a lower power output compared to the anaerobic system.
Maintaining a high-speed sprint requires a rapid supply of energy from the anaerobic system, which depletes quickly due to its limited capacity. As a result, sprinters can only sustain their maximum speed for a short distance before fatigue sets in.
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