Thompson_Brachial.pdf (194.17 kB)
Brachial artery characteristics and micro-vascular filtration capacity in rock climbers
journal contribution
posted on 2015-11-05, 13:31 authored by Emilia Thompson, Luke Farrow, Julie E.A. Hunt, Mark LewisMark Lewis, Richard FergusonRichard FergusonRock climbers perform repeated isometric forearm muscle contractions subjecting the vasculature to repeated ischaemia and distorted haemodynamic signals. This study investigated forearm vascular characteristics in rock climbers compared to healthy untrained controls. Eight climbers (CLIMB) (BMI; 22.3, s = 2.0 kg/m2, isometric handgrip strength; 46, s = 8 kg) were compared against eight untrained controls (CON) (BMI; 23.8, s = 2.6 kg/m2, isometric handgrip strength; 37, s = 9 kg). Brachial artery diameter and blood flow were measured, using Doppler ultrasound, at rest and following 5-mins ischaemia (peak diameter) and ischaemic exercise (maximal dilation) to calculate flow mediated dilation (FMD) and dilatory capacity (DC). Capillary filtration capacity was assessed using venous occlusion plethysmography. Resting (4.30, s = 0.26 vs. 3.79, s = 0.39 mm), peak (4.67, s = 0.31 vs. 4.12, s = 0.45 mm) and maximal (5.14, s = 0.42 vs. 4.35, s = 0.47 mm) diameters were greater (P < 0.05) in CLIMB than CON, respectively, despite no difference in FMD (9.2, s = 2.6 vs. 8.7, s = 2.9%). Peak reactive hyperaemic blood flow (1136, s = 504 vs. 651, s = 221 ml/min) and capillary filtration capacity (3.8, s = 0.9 vs. 5.2, s = 0.7 ml.min−1.mmHg−1.100 ml tissue−1 × 10−3) were greater (P < 0.05) in CLIMB compared to CON, respectively. Rock climbers exhibit structural vascular adaptation compared to untrained control participants but have similar vascular function. This may contribute to the enhanced ability of climbers to perform repeated isometric contractions.
History
School
- Sport, Exercise and Health Sciences
Published in
European Journal of Sport ScienceVolume
15Issue
4Pages
296 - 304Citation
THOMPSON, E. ...et al., 2015. Brachial artery characteristics and micro-vascular filtration capacity in rock climbers. European Journal of Sport Science, 15(4), pp. 296-304.Publisher
© Taylor & Francis GroupVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This is an Accepted Manuscript of an article published by Taylor & Francis in the European Journal of Sport Science on 28th July 2014 available online: http://dx.doi.org/10.1080/17461391.2014.940560ISSN
1746-1391eISSN
1536-7290Publisher version
Language
- en