Training Characteristics Related to (the Changes in) Durability in Semiprofessional Cyclists

Area of Science:

• Exercise Physiology
• Sports Science
• Performance Optimization

Background:

• Understanding the dose-response relationship between training load and performance is crucial for effective athletic development.
• Assessing performance in both fresh and fatigued states provides insights into training durability.
• Factors like gross efficiency and substrate oxidation (FatOx and CarbOx) may influence training adaptations.

Purpose of the Study:

• To investigate the dose-response relationship between training and time-trial performance in cyclists.
• To evaluate performance in both fresh and fatigued states to understand training durability.
• To explore the roles of gross efficiency, FatOx, and CarbOx in training adaptations.

Main Methods:

• Ten male semiprofessional cyclists completed 8 weeks of training.
• Performance tests (PO1 and PO10) were conducted in fresh and fatigued states before and after training.
• Measurements included gross efficiency, FatOx, CarbOx, and various training load metrics.

Main Results:

• No significant correlation was found between overall training load and time-trial performance improvements.
• Carbohydrate oxidation (CarbOx) correlated with training volume in the fresh state and time below first-lactate threshold in the fatigued state.
• The relationship between training load and performance change differed between fresh and fatigued states, particularly for FatOx and CarbOx.

Conclusions:

• A single training load metric cannot reliably predict performance improvements after an 8-week training period.
• Training interventions can differentially affect performance in fresh versus fatigued states.
• These findings have implications for designing personalized training plans to enhance cycling performance and durability.