Physiological predictors of maximum treadmill walking performance in patients with intermittent claudication

TEW, G., NAWAZ, S., BLAGOJEVIC, M., ZWIERSKA, I. and SAXTON, J. M. (2009). Physiological predictors of maximum treadmill walking performance in patients with intermittent claudication. International journal of sports medicine, 30 (06), 467-472.

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Official URL: http://dx.doi.org/10.1055/s-0028-1111110
Link to published version:: 10.1055/s-0028-1111110

Abstract

The purpose of this investigation was to identify physiological predictors of maximum treadmill walking performance (MWD) in patients with intermittent claudication. Forty-five claudicants performed a graded treadmill test to determine MWD, peak oxygen uptake, and gas exchange threshold. Calf muscle oxygenation (StO2) at 1 min and time to minimum StO2 were also measured using near-infrared spectroscopy. On other occasions, peak calf blood flow, resting ankle-brachial index, and pulmonary oxygen uptake kinetics during steady-state walking were assessed. A forward stepwise multiple regression analysis was performed to determine predictors of MWD. A regression model comprising time to minimum StO2, peak oxygen uptake, and StO2 at 1 min explained 64% of the variation in MWD. The results suggest that cardiopulmonary fitness and the ability to match oxygen delivery to metabolic demand are important determinants of walking performance in claudicants, and that certain near-infrared spectroscopy variables might be useful in studies that evaluate the mechanisms of clinical improvement with different treatment interventions.

Item Type: Article
Research Institute, Centre or Group: Centre for Sport and Exercise Science
Identification Number: 10.1055/s-0028-1111110
Depositing User: Sarah Ward
Date Deposited: 02 Feb 2010 16:47
Last Modified: 28 Jan 2011 18:03
URI: http://shura.shu.ac.uk/id/eprint/1023

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