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EN
Uncoupling proteins 2 and 3 (UCP2 and UCP3) as mitochondrial electron transporters are involved in regulation of ATP production and energy dissipation as heat. Energy efficiency plays an important role in physical performance, especially in aerobic fitness. The aim of this study was to examine the association between maximal oxygen uptake and genetic variants of the UCP2 and UCP3 genes. The studies were carried out in a group of 154 men and 85 women, professional athletes representing various sports and fitness levels and students of the University of Physical Education in Poznań. Physiological and molecular procedures were used, i.e. direct measurement of maximum oxygen uptake (VO2max) and analysis of an insertion/deletion (I/D) polymorphism in the 3'untranslated region of exon 8 of the UCP2 gene and a C>T substitution in exon 5 (Y210Y) of the UCP3 gene. No statistically significant associations were found, only certain trends. Insertion allele (I) of the I/D UCP2 and the T allele of the UCP3 gene were favourable in obtaining higher VO2max level and might be considered as endurance-related alleles.
EN
Purpose. Genetic factors play an important role in physical performance. In this study, the polymorphism of the angiotensin-converting enzyme gene (ACE) was analyzed in relation to the level of physical fitness, measured by maximal oxygen uptake (VO2max). Methods. Molecular genetic research on the ACE gene was carried out on a group of 154 men and 85 women. All of the subjects were Polish students at the University School of Physical Education in Poznań and included professional athletes representing various sport disciplines and levels of fitness. Results. Allele I was found to have an advantageous effect on higher maximal oxygen uptake values and, in addition, a characteristic distribution of genotypes was found, where allele II was more common in individuals practicing aerobic sports and allele DD in individuals training anaerobic disciplines. Conclusion. No significant associations were found between I/D polymorphism in the ACE gene and VO2max values but certain tendencies were found for those individuals with the ACE II genotype.
EN
The search for genes with a positive influence on physical fitness is a difficult process. Physical fitness is a trait determined by multiple genes, and its genetic basis is then modified by numerous environmental factors. The present study examines the effects of the polymorphism of creatine kinase (CKM) gene on VO2max - a physiological index of aerobic capacity of high heritability. The study sample consisted of 154 men and 85 women, who were students of the University School of Physical Education in Poznań and athletes practicing various sports, including members of the Polish national team. The study revealed a positive effect of a rare G (NcoI-) allele of the CKM gene on maximal oxygen uptake in Caucasian women practicing sports requiring aerobic and anaerobic exercise metabolism. Also a tendency was noted in individuals with NcoI-/- (GG) and NcoI-/+ (GA) genotypes to reach higher VO2max levels.
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