Title: Genetic and environmental determination of tracking in static strength during adolescence
Authors: Peeters, Maarten ×
Thomis, Martine
Maes, Hermine
Beunen, Gaston
Loos, Ruth
Claessens, Albrecht
Vlietinck, Robert #
Issue Date: Sep-2005
Series Title: Journal of applied physiology (Bethesda, Md. : 1985) vol:99 issue:4 pages:1317-26
Abstract: The purpose of this study was to determine whether the observed phenotypic stability in static strength during adolescence, as measured by interage correlations in arm pull, is mainly caused by genetic and/or environmental factors. Subjects were from the Leuven Longitudinal Twin Study (n = 105 pairs, equally divided over 5 zygosity groups). Arm-pull data were aligned on age at peak height velocity to attenuate the temporal fluctuations in interage correlations caused by differences in timing of the adolescent growth spurt. Developmental genetic models were fitted using structural equation modeling. After the data were aligned on age at peak height velocity, the annual interage correlations conformed to a quasi-simplex structure over a 4-yr interval. The best-fitting models included additive genetic and unique environmental sources of variation. Additive genetic factors that already explained a significant amount of variation at previous measurement occasions explained 44.3 and 22.5% of the total variation at the last measurement occasion in boys and girls, respectively. Corresponding values for unique environmental sources of variance are 31.2 and 44.5%, respectively. In conclusion, the observed stability of static strength during adolescence is caused by both stable genetic influences and stable unique environmental influences in boys and girls. Additive genetic factors seem to be the most important source of stability in boys, whereas unique environmental factors appear to be more predominant in girls.
ISSN: 8750-7587
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Clinical Genetics Section (-)
Exercise Physiology Research Group
Physical Activity, Sports & Health Research Group
× corresponding author
# (joint) last author

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