ACTN3 genotypes of Rugby Union players: Distribution, power output and body composition

被引:19
作者
Bell, W. [1 ]
Colley, J. P. [2 ]
Evans, W. D. [3 ]
Darlington, S. E. [3 ]
Cooper, S. -M. [1 ]
机构
[1] Cardiff Metropolitan Univ, Cardiff, S Glam, Wales
[2] Cardiff Univ, Inst Med Genet, Cardiff, S Glam, Wales
[3] Univ Wales Hosp, Dept Med Phys & Clin Engn, Cardiff CF4 4XW, S Glam, Wales
关键词
Rugby union; alpha-actinin-3; power output; body composition; R577X POLYMORPHISM; ALPHA-ACTININ-3; DEFICIENCY; ENDURANCE PERFORMANCE; ELITE ENDURANCE; ATHLETE STATUS; ASSOCIATION; GENE; PHENOTYPES; STRENGTH; YOUNG;
D O I
10.3109/03014460.2011.632648
中图分类号
Q98 [人类学];
学科分类号
030303 ;
摘要
Background and aim: To identify the distribution and explore the relationship between ACTN3 genotypes and power and body composition phenotypes. Subjects and methods: Case control and association studies were employed using a homogeneous group of players (n = 102) and a control group (n 110). Power-related phenotypes were measured using the counter movement jump (CMJ) and body composition phenotypes by dual-energy X-ray absorptiometry (DXA). Statistics used were Pearson's chi-square, ANCOVA, coefficients of correlation and independent t-tests. Genotyping was carried out using polymerase chain reaction followed by enzymatic Ddel digestion. Results: Genotype proportions of players were compared with controls (p - 0.07). No significant genotype differences occurred between forwards or backs (p - 0.822) or within-forwards (p - 0.882) or within-backs (p - 0.07). Relative force and velocity were significantly larger in backs, power significantly greater in forwards; in body composition, all phenotypes were significantly greater in forwards than backs. Correlations between phenotypes were greater for the RX genotype (p = 0.05-0.01). Conclusions: Relationships between ACTN3 genotypes and power or body composition-related phenotypes were not significant. As fat increased, power-related phenotypes decreased. As body composition increased, power-related phenotypes increased.
引用
收藏
页码:19 / 27
页数:9
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