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Functional data analysis reveals asymmetrical crank torque during cycling performed at different exercise intensities
Jéssica da Silva Soares1, Felipe P Carpes2, Gislaine de Fátima Geraldo1
1Biomechanics Laboratory, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Journal of Biomechanics
|May 8, 2021
Summary
Pedaling asymmetry in cyclists is not accurately measured by peak torque alone. Analyzing the entire torque profile using functional analysis of variance (FANOVA) reveals true biomechanical differences, crucial for understanding performance and injury risk.
Area of Science:
- Sports Science
- Biomechanics
- Exercise Physiology
Background:
- Pedaling asymmetry is frequently linked to cycling performance and injury risk, but evidence remains inconclusive.
- Previous studies often relied on peak torque measurements, potentially overlooking nuances in the pedaling movement pattern.
Purpose of the Study:
- To investigate whether analyzing pedaling torque profiles provides a more accurate assessment of asymmetry than peak torque analysis.
- To compare the efficacy of traditional analysis of variance (ANOVA) versus functional analysis of variance (FANOVA) in detecting pedaling asymmetries.
Main Methods:
- Cyclists pedaled at 60%, 80%, and 95% of maximal power output.
- Peak torques and torque curves were recorded for preferred and non-preferred legs.
- Data were analyzed using both ANOVA and FANOVA.
Main Results:
- ANOVA indicated no significant difference in peak torque between legs across intensities.
- FANOVA revealed significant asymmetries in torque profiles between legs, irrespective of intensity, highlighting differences in specific cycle sections.
- These asymmetries were not reflected in peak torque values.
Conclusions:
- Peak torque analysis is insufficient for quantifying pedaling asymmetry.
- Functional analysis of variance (FANOVA) offers a more sensitive method for assessing biomechanical patterns in pedaling torque.
- This approach may enhance the understanding of pedaling asymmetry's role in cycling performance and injury prevention when combined with other biomechanical assessments.
