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Can greater muscularity in larger individuals resolve the 3/4 power-law controversy when modelling maximum oxygen uptake?Nevill, Michael Alan ...Background:%The power function relationship, MR%=%a%mb, between metabolic rate (MR) and body mass m has been the source of much controversy amongst biologists for many years. Various studies have ... reported mass exponents (b) greater than the anticipated %surface-area% exponent 0.67, often closer to 0.75 originally identified by Kleiber. Aim:%The study aimed to provide a biological explanation for these %inflated% exponents when modelling maximum oxygen uptake (%max), based on the observations from this and previous studies that larger individuals develop disproportionately more muscle mass in the arms and legs. Research design and subjects:%A cross-sectional study of 119 professional soccer players from Croatia aged 18%34 was carried out. Results:%Here we confirm that the power function relationship between %max and body mass of the professional soccer players results in an %inflated% mass exponent of 0.75 (95% confidence interval from 0.56 to 0.93), but also the larger soccer players have disproportionately greater leg muscle girths. When the analysis was repeated incorporating the calf and thigh muscle girths rather than body mass as predictor variables, the analysis not only explained significantly more of the variance in %max, but the sum of the exponents confirmed a surface-area law. Conclusions:%These findings confirm the pitfalls of fitting body-mass power laws and suggest using muscle-girth methodology as a more appropriate way to scale or normalize metabolic variables such as %max for individuals of different body sizes.Vir: Annals of human biology. - ISSN 0301-4460 (Vol. 31, no. 4, Jul.-Aug. 2004, str. 436-445)Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasleLeto - 2004Jezik - angleškiCOBISS.SI-ID - 1541875140
Avtor
Nevill, Michael Alan |
Marković, Goran, 1975- |
Vučetić, Vlatko |
Holder, R.
Teme
body mass |
metabilic rate |
maximum oxygen uptake |
modelling |
presnova |
hitrost |
telesna masa |
poraba kisika |
modeliranje
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Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Nevill, Michael Alan | ![]() |
Marković, Goran, 1975- | 53981 |
Vučetić, Vlatko | ![]() |
Holder, R. | ![]() |
Vir: Osebne bibliografije
in: SICRIS
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