Related Experiment Videos
Effect of two drafting modalities in cycling on running performance
C Hausswirth1, J M Vallier, D Lehenaff
1Laboratoire de Biomécanique et de Physiologie, Institut National du Sport et de L'Education Physique (INSEP), 75012 Paris, France.christophe.hausswirth@wanadoo.fr
Medicine and Science in Sports and Exercise
|March 17, 2001
Summary
Continuous drafting behind a cyclist significantly reduces physiological strain during the cycling portion of a triathlon. This energy saving in continuous draft triathlon (CDT) leads to improved subsequent running performance compared to alternate draft triathlon (ADT).
Area of Science:
- Sports Science
- Exercise Physiology
- Triathlon Performance
Background:
- Drafting in cycling significantly impacts energy expenditure and performance.
- Understanding the physiological differences between continuous and alternate drafting is crucial for triathletes.
- Optimizing cycling strategy can enhance overall triathlon outcomes.
Purpose of the Study:
- To compare physiological responses during continuous draft triathlon (CDT) versus alternate draft triathlon (ADT).
- To investigate the effect of these drafting modalities on subsequent running performance.
- To analyze energy expenditure and physiological strain in different drafting scenarios.
Main Methods:
- Ten national-level male triathletes completed a sprint triathlon under two conditions: ADT and CDT.
- Physiological measures including oxygen uptake (VO2), expiratory flow (VE), and heart rate (HR) were recorded.
- Blood lactate concentrations ([La-]b) were measured post-event.
Main Results:
- CDT resulted in significantly lower VO2, VE, HR, and [La-]b during the cycling leg compared to ADT.
- Running performance was significantly improved after cycling in CDT versus ADT.
- Physiological strain during the run was higher following CDT, indicating greater overall effort utilization.
Conclusions:
- Continuous drafting behind a cyclist conserves significant energy during the triathlon bike leg.
- CDT provides conditions for enhanced running performance compared to ADT.
- Strategic drafting is a key factor in optimizing triathlon performance.