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Examining pacing profiles in elite female road cyclists using exposure variation analysis
C R Abbiss1, L Straker, M J Quod
1School of Exercise, Biomedical and Health Sciences, Edith Cowan University, 100 Joondalup Dr, Joondalup, WA 6027, Australia. c.abbiss@ecu.edu.au
British Journal of Sports Medicine
|June 5, 2008
Summary
Exposure variation analysis (EVA) reveals significant differences in power output distribution across professional cycling race formats. Time trials show more even power distribution compared to circuit and road races, impacting training intensity zones.
Area of Science:
- Sports Science
- Exercise Physiology
- Biomechanical Analysis
Background:
- Understanding power output variability is crucial for optimizing training and performance in elite cycling.
- Previous analyses often lack the granularity to differentiate power distribution across diverse competitive formats.
- New mathematical approaches are needed to quantify power output dynamics during races.
Purpose of the Study:
- To analyze the amplitude and time distribution of power output in various professional cycling events using exposure variation analysis (EVA).
- To quantify total and acute time spent at different exercise intensity levels during competitive cycling.
- To compare power output variations across different race formats: tour races, World Cup events, and time trials.
Main Methods:
- A descriptive field study design was employed.
- Data were collected from 9 elite female cyclists across professional road cycling events, including a 5-day tour, a 1-day World Cup, and the Australian National Individual Time Trial Championships.
- Power output during events was compared against intensity levels (first and second ventilation thresholds, maximal aerobic power) determined from pre-event graded exercise tests.
Main Results:
- Exposure variation analysis (EVA) indicated that power output during time trials was highly variable but more evenly distributed (EVA(SD) = 2.81) compared to circuit/criterium (4.23) and road race events (4.81).
- Significant differences in the distribution of power output were observed between time trials, circuit races, and road races.
- The specific race format influenced both the overall duration and the acute time spent within various power output bands.
Conclusions:
- Exposure variation analysis (EVA) is a valuable tool for illustrating power output variations in cycling events.
- Race format significantly impacts the distribution of power output and time spent at different exercise intensities.
- These findings have implications for periodization, training intensity prescription, and race strategy in professional cycling.
