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Comparison of physiological responses and performance between mountain bicycles with differing suspension systems
Jeffrey E Herrick1, Judith A Flohr, Davis L Wenos
1Department of Kinesiology and Health Education, Southern Illinois University, Edwardsville, IL, USA.
International Journal of Sports Physiology and Performance
|January 18, 2012
Summary
Front-only suspension (FS) mountain bikes are faster than front-and-rear suspension (FRS) bikes in cross-country racing. The lighter weight of FS bikes improves cycling economy on ascents, leading to better overall race performance.
Area of Science:
- Sports Science
- Biomechanics
- Cycling Technology
Background:
- Cross-country mountain biking involves varied terrain and sustained high intensity.
- Suspension systems (front-only vs. front-and-rear) are designed to improve comfort and control but may affect energy expenditure.
- Optimizing bicycle design is crucial for competitive performance in endurance cycling events.
Purpose of the Study:
- To compare the metabolic and performance outcomes of front-only suspension (FS) versus front-and-rear suspension (FRS) mountain bikes.
- To evaluate the effects of suspension type on cyclists during simulated cross-country race conditions.
- To determine the influence of bike weight and suspension on climbing and descending performance.
Main Methods:
- Seven competitive male mountain bikers completed randomized front-only suspension (FS) and front-and-rear suspension (FRS) trials.
- Riders completed four laps of an 8 km off-road course with significant elevation gain per lap.
- Physiological data (VO2, HR, RPE) were collected during submaximal efforts, and a maximal time-trial lap assessed overall performance.
Main Results:
- No significant differences in oxygen consumption (VO2), heart rate (HR), or rating of perceived exertion (RPE) were observed between FS and FRS during submaximal laps.
- Front-only suspension (FS) resulted in significantly faster times during the ascending segments of the course compared to FRS.
- Overall performance in the final time-trial lap was significantly faster on the FS bike, indicating superior race pace.
Conclusions:
- Front-only suspension (FS) bicycles offer a performance advantage over front-and-rear suspension (FRS) bikes in simulated cross-country mountain bike races.
- The lighter weight of FS bikes likely contributes to improved cycling economy, particularly on uphill sections.
- Cyclists may achieve faster race times by utilizing lighter, front-suspension-only mountain bikes on courses with substantial climbing.
