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Allometry of anaerobic performance: a gender comparison
1Division of Sport Science, Manchester Metropolitan University, England.
Summary
Males exhibit superior anaerobic performance compared to females, independent of muscle mass. Multivariate allometric scaling (MAS) confirmed this sex difference in peak power output (PPO) even after accounting for fat-free mass (FFM) and muscle cross-sectional area (CSA).
Area of Science:
- Exercise Physiology
- Human Performance
- Biomechanical Analysis
Background:
- Meaningful comparisons of physiological variables often require scaling for body size.
- Multivariate allometric scaling (MAS) is a technique used to adjust for body size differences.
Purpose of the Study:
- To compare the anaerobic performance between adult males and females using MAS.
- To investigate if sex differences in peak power output (PPO) persist after accounting for muscle mass indicators.
Main Methods:
- 12 matched pairs of adult males and females were studied.
- Peak power output (PPO) was measured using a 30-s cycle ergometer test.
- Fat-free mass (FFM) and thigh muscle/bone cross-sectional area (CSA) were used as covariates in MAS.
Main Results:
- MAS identified common scaling exponents (b=0.1) for FFM and CSA, indicating negative allometry.
- Significant differences in absolute PPO were observed between sexes (males > females).
- Sex differences in PPO remained significant after scaling for FFM and CSA.
Conclusions:
- The superior anaerobic performance in males is not solely explained by differences in muscle mass or size.
- MAS is a valuable tool for comparing physiological performance across individuals with varying body sizes.