. Author manuscript; available in PMC: 2014 Feb 28.

Published in final edited form as: Compr Physiol. 2011 Jul;1(3):1603–1648. doi: 10.1002/cphy.c100059

Table 2.

Intraclass correlations from twin studies of maximal oxygen intake

Source	N Pairs		Cohort	Test	MZ	DZ
Source	MZ	DZ	Cohort	Test	MZ	DZ
Klissouras (1971)	15	10	Males	VO₂max/kg	0.91	0.44
Klissouras et al (1973)	23	16	Males and females	VO₂max/kg	0.95	0.36
Bouchard et al (1986a)	53	33	Males and females	VO₂max/kg	0.71	0.51
Fagard et al (1991)	29	19	Males	VO₂max/kg	0.77	0.04
Maes et al (1993)	41	50	Males and females	VO₂max/kg	0.85	0.56
Sundet et al (1994)	436	622	Males	VO₂max/kg Predicted^A)	0.62	0.29
Maes et al (1996)	43	61	10-year-old boys and girls	VO₂max^B)	0.75	0.32

^A)

Maximal aerobic power was predicted from a nomogram and the predicted VO₂max was subsequently transformed to a categorical score from 1 to 9. The intraclass correlations are based upon the categorical scores.

^B)

VO₂max not adjusted for body mass.

From (43) Bouchard C, et al. Genetic Determinants of Endurance Performance. In: Shephard RJ and Astrand P-O, editors. Endurance in Sport. pgs 223–42.(IOC), 2000.