Performance and Fatigue Patterns in Elite Cyclists During 6 h of Simulated Road Racing.

Area of Science:

• Sports Science
• Exercise Physiology
• Cycling Performance

Background:

• Fatigue resistance is crucial for elite road cyclists competing in prolonged events.
• Understanding fatigue mechanisms is key to optimizing training and race strategies.

Purpose of the Study:

• To investigate the factors influencing fatigue resistance in national elite cyclists.
• To analyze fatigue patterns during a 6-hour simulated cycling race.

Main Methods:

• Combined laboratory testing with 6-hour simulated road cycling with physiological monitoring.
• Assessed peak sprint power and 5km time trial performance at 0, 2, 4, and 6 hours.
• Measured maximal fat oxidation and blood lactate levels.

Main Results:

• Peak sprint power decreased initially (0-2h) then stabilized; time trial power showed a gradual decline over 6 hours.
• Individual fatigue responses varied, with time trial power losses ranging from 2% to 14%.
• High carbohydrate intake maintained blood glucose, while fat oxidation increased and post-exercise lactate decreased over time.

Conclusions:

• Elite cyclists experience distinct fatigue patterns: initial sprint power impairment followed by gradual time trial performance decline.
• Fatigue resistance is highly individualized, necessitating tailored performance strategies.
• Metabolic shifts towards fat oxidation occur during prolonged exercise, despite adequate carbohydrate intake.