Effects of Caffeine on Durability After a Simulated Race in Trained Cyclists: A Field-Based Cross-Over Randomized...

Area of Science:

• Sports Science
• Exercise Physiology
• Nutritional Science

Background:

• Preexercise caffeine intake is known to enhance cycling performance.
• The impact of caffeine consumed during prolonged exercise on subsequent performance remains debated.
• Understanding caffeine's ergogenic potential during extended cycling events is crucial for athletes.

Purpose of the Study:

• To investigate the effect of caffeine ingestion during prolonged cycling on time-trial performance in trained junior cyclists.
• To determine if mid-exercise caffeine intake can prevent performance decrements.
• To compare the outcomes of caffeine versus placebo administration during simulated race conditions.

Main Methods:

• Triple-blinded, randomized, placebo-controlled crossover design.
• Thirteen junior cyclists completed a simulated cycling race followed by an 8-minute time trial.
• Caffeine (6 mg/kg) or placebo was administered 60 minutes before the time trial.

Main Results:

• A significant decline in power output was observed with placebo compared to fresh conditions.
• Caffeine ingestion during the simulated race did not result in a significant performance decline in the subsequent time trial.
• While not statistically significant, caffeine showed a moderate performance benefit (3.1%) over placebo, exceeding the smallest worthwhile change.

Conclusions:

• High-dose caffeine intake during prolonged cycling may partially mitigate performance impairments in junior cyclists.
• Further research is required to definitively confirm the ergogenic effect of mid-exercise caffeine compared to placebo.
• Caffeine's role in maintaining endurance performance warrants continued investigation in athletic populations.