Wolverhampton Intellectual Repository and E-Theses >
School of Sport, Performing Arts and Leisure >
Research Centre for Sport, Exercise and Performance >
Exercise and Health >
No correlation between circulating ACE activity and VO2max or mechanical efficiency in women.
this identifier to cite or link
to this item:
|Title: ||No correlation between circulating ACE activity and VO2max or mechanical efficiency in women.|
|Citation: ||European Journal of Applied Physiology, 99 (1): 11-18|
|Journal: ||European Journal of Applied Physiology|
|Issue Date: ||2007 |
|PubMed ID: ||17006710|
|Additional Links: ||http://www.springerlink.com/content/fn831636n85684l5/|
|Abstract: ||The insertion (I) variant of the angiotensin-1 converting enzyme (ACE) I/D genetic polymorphism is associated with lower circulating and tissue ACE activity. Some studies have also suggested associations of ACE I/D genotype with endurance phenotypes. This study assessed the relationships between circulating ACE activity, ACE I/D genotype, mechanical efficiency and the maximal rate of oxygen uptake in sedentary individuals. Sixty-two untrained women were tested for mechanical efficiency during submaximal cycle ergometry (delta and gross efficiencies during exercise between 40 and 80 W) and the maximal rate of oxygen uptake during incremental treadmill running. Respiratory variables were measured using indirect calorimetry. Venous blood was obtained for direct assay of circulating ACE activity, allowing for the assessment of correlations between two continuous variables, rather than a categorical analysis of endurance phenotype by genotype alone. ACE I/D genotype was also determined, and was strongly associated with circulating ACE activity (P < 0.0005). Neither circulating ACE activity (27.4 +/- 8.4 nM His-Leu-ml(-1)) nor ACE genotype showed a statistically significant association with any of the endurance phenotypes measured. The weak correlations observed included r = -0.122 (P = 0.229) for the relationship between delta efficiency (23.9 +/- 2.5%) and circulating ACE activity and r = 0.134 (P > 0.6) for the relationship between maximal aerobic power (149.1 +/- 22.9 ml kg(-2/3) min(-1)) and circulating ACE activity. The data do not support a role for systemic ACE activity in the regulation of endurance performance in sedentary individuals, extending this observation to a large female cohort.|
|Keywords: ||Angiotensin-1 converting enzyme|
|Appears in Collections: ||Exercise and Health|
|Files in This Item:|
There are no files associated with this item.
All Items in WIRE are protected by copyright, with all rights reserved, unless otherwise indicated.