Which of the following is an effect of caffeine as a supplement for athletes?

Caffeine is recognized as an effective supplement for athletes primarily because it can delay feelings of fatigue during exercise. This is largely due to its ability to enhance the mobilization of fatty acids from adipose tissue, allowing the body to utilize fat as a fuel source rather than relying solely on glycogen stores. This results in improved endurance and performance, as athletes experience reduced perceived exertion, allowing them to sustain activity for longer periods.

The effect of caffeine on delaying fatigue is supported by numerous studies indicating that it can improve endurance performance and enhance overall athletic performance by increasing energy levels and reducing the perception of effort during prolonged physical activity. Integrating caffeine into an athlete's nutrition regimen must be done mindfully, considering individual tolerance and timing of consumption for optimal performance benefits.