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Resting Metabolic Rate in Monozygotic and Dizygotic Twins

Published online by Cambridge University Press:  01 August 2014

E. Fontaine ,
R. Savard ,
A. Tremblay ,
J.P. Després ,
E. Poehlman  and
C. Bouchard
E. Fontaine
Affiliation:
Physical Activity Sciences Laboratory, Laval University Quebec
R. Savard
Affiliation:
Physical Activity Sciences Laboratory, Laval University Quebec
A. Tremblay
Affiliation:
Physical Activity Sciences Laboratory, Laval University Quebec
J.P. Després
Affiliation:
Physical Activity Sciences Laboratory, Laval University Quebec
E. Poehlman
Affiliation:
Physical Activity Sciences Laboratory, Laval University Quebec
C. Bouchard*
Affiliation:
Physical Activity Sciences Laboratory, Laval University Quebec
*
Physical Activity Sciences Laboratory, PEPS - Laval University Ste-Foy, Québec, CanadaGIK 7P4

Abstract

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In order to study the influence of heredity on resting metabolic rate (RMR), 20 monozygotic and 19 dizygotic male twin pairs aged 20.6 (SD 2.9) and 21.4 (SD 3.1) years, gave their consent to participate in the experiment. Fat free weight (FFW) was estimated from underwater weighing. RMR was measured by indirect calorimetry using an open circuit system. RMR was expressed as kJ · min−1, kJ/m2 · h−1, kJ/kg · h−1 and kJ/kgFFW · h−1. Significant intraclass coefficients were observed in MZ twins for the different expressions of RMR. The values ranged from r = 0.45 (P < 0.05) to r = 0.81 (P < 0.01). However, DZ twins demonstrated lower intraclass coefficients for RMR, with a range from r = 0.21 to r = 0.44. Significant (P < 0.05) DZ resemblance was revealed only when RMR was expressed as kJ · min−1 and kJ/kg · h−1. Results of the present study suggest that variations in RMR may have a genetic component. Implications for human energy balance and body fat are discussed.

Keywords

TwinsResting metabolic rateBody fatnessEnergy expenditure
Type
Review Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 34 , Issue 1-2 , April 1985 , pp. 41 - 47
Copyright
Copyright © The International Society for Twin Studies 1985

References

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