Genetic factors in physical activity and the equal environment assumption-- the Swedish young male twins study.


The aims of this study were to examine the genetic contribution on physical activity (PA) within a nationwide population of young adult male twin pairs from Sweden and to investigate the equal environment assumption (EEA) in relation to PA. Information on PA was collected by questionnaires in 1998 and 2002 and the impact of genetic factors was estimated by… (More)


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