Abstract - Purpose: The study aimed to assess whether VO2 max data is significantly different between male and female sample groups when eliminating the affects of body mass (BM), this was analyzed through the use of scaling methods. Method: Subjects (33 male, 21 female) performed a V02 max test on a treadmill and these results were analyzed using standard ratios, regression standards and power functions. Estimated regression parameters described the influence of BM on the V02 max data. Allometric modeling adjusted for the size differences between the samples using the transformed data in the form of Y = A + B1x1 Results: The study found there was a significant difference in the V02max means, the males means was 11.070 ± (1.627) ml kg?¹ min?¹, and the females was 8.534 ± (1.258) ml kg?¹ min?¹ when calculated to the power of 0.360 through the use of the power function and regression standards.
[...] To test the null hypothesis = that the means of the two samples are not significantly different, a Two-Sample t-test was performed on the absolute V02 max (l/min) data between males and females. All ‘parametric' tests require the data to meet certain assumptions for parametric tests to be utilized; 1. Residuals from the tests are normally distributed 2. Homogeneity of variance is present about the means for the male and female groups 3. Individual scores are independent of one another 4. [...]
[...] VO2 max is a measure of the maximum volume of oxygen that an athlete can consume and utilize. In absolute terms it is measured in milliliters per minute (ml minˉ¹). McKardle, et al., (2001) suggested that as intensity increases during exercise, the amount of oxygen consumed to produce energy also increases. However, there is a maximum level of oxygen consumption, beyond which increases in exercise intensity don't lead to further increases in oxygen consumption. This level of oxygen consumption is called the VO2 max. [...]
[...] Regression analysis of the VO2 versus the BM revealed the equation: V02 = 54.3 - 0.254 BM + 17.5 Sex m The effects of the covariate and the sex M main effects were highly significant 0.01 The results revealed that the male and female VO2 max results differed by precisely 17.486 l/min when the covariate is held constant. The ANCOVA partitioned out the affects of BM on the adjusted means. The males adjusted means were 53.604 (l/min) and the females were 36.118 (l/min). [...]
[...] When doing this the data suggested the V02max means for the males was 11.070 ( 1.627 ) ml kgˉ¹ minˉ¹, and females was 8.534 ( 1.258 ) ml kgˉ¹ minˉ¹ when calculated to the power of 0.360 which suggests there was a significant difference between the male and female groups after BM had been portioned out. This result may have been due to other independent variables such as general fitness, efficiency, economy .etc. This suggestion is backed by Janz et al., (1998) who suggested that once V02 has been appropriately adjusted for body size, any remaining difference explains the effects of other independent variables. [...]
[...] American Journal of Physiology H495 H Mckardle, D. Katch, F. Katch, V. (2005), Essentials of Exercise Physiology, 3rd edition. London : Lippincott Williams & Wilkins Mckardle, D. Katch, F. Katch, V. (2001), Exercise physiology : energy, nutrition, and human performance, 5th Edition. London : Lippincott Williams & Wilkins Nevill, A.M. (1994). The need to scale for differences in body size and mass: an explanation of Kleiber's 0.75 exponent. Journal of Applied Physiology pp.2870- Nevill, A.M., Ramsbottom, R., Williams, C. (1992). [...]
Online readingwith our online reader
Content validatedby our reading committee