A comparison of pulmonary oxygen uptake kinetics in middle- and long-distance runners

KILDING, A. E., WINTER, E. M. and FYSH, M. (2006). A comparison of pulmonary oxygen uptake kinetics in middle- and long-distance runners. International journal of sports medicine, 27 (5), 419-426.

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Link to published version:: 10.1055/s-2005-865778

Abstract

<p>The purpose of this study was two-fold: 1) to compare the on- and off-transient pulmonary oxygen uptake (VO<sub>2</sub>) kinetics, in the moderate-intensity domain, of middle-distance (MD) and long-distance (LD) runners and 2) to determine the relationship between the volume of training and VO<sub>2</sub> kinetics. With institutional ethics approval, 16 competitive male MD (800/1500 m) and 16 competitive male LD runners (5000/10 000 m) participated in the study. Each runner completed a series of tests to assess maximal VO<sub>2</sub> (VO<sub>2</sub>max), ventilatory threshold (V<sub>T</sub>), and both the on- and off-transient primary time constants (T<sub>on</sub> and T<sub>off</sub>, respectively) in response to moderate-intensity treadmill exercise. The results showed that T<sub>on</sub> was significantly shorter in LD (12.3 ± 0.5 s) than MD runners (16.4 ± 1.0 s, p = 0.002). During recovery from exercise, T<sub>off</sub> was shorter in LD than MD runners (T<sub>off</sub>, 24.3 ± 0.6 s vs. 26.9 ± 0.8 s, p = 0.017). The volume of training was greater in LD (66.6 ± 3.5 km . wk<sup>-1</sup>) than MD runners (43.5 ± 3.9 km . wk<sup>-1</sup>, p < 0.001) and was related to T<sub>on</sub> in both groups of runner (MD: r = - 0.63, p = 0.009; LD: r = - 0.68, p = 0.004). Collectively, the results show that MD and LD runners can be differentiated on the basis of their on- and off-transient VO<sub>2</sub> kinetics, despite similarities of VO<sub>2 max</sub> and V<sub>T</sub>. This is attributable to the greater volume of training performed by LD runners. Further investigations into adaptation(s) to training in muscle in MD and LD runners is required to determine the functional significance of such differences and the response of VO<sub>2</sub> kinetic parameters to different training stimuli.</p>

Item Type: Article
Research Institute, Centre or Group: Centre for Sport and Exercise Science
Identification Number: 10.1055/s-2005-865778
Depositing User: Ann Betterton
Date Deposited: 18 Dec 2008
Last Modified: 09 Dec 2009 18:23
URI: http://shura.shu.ac.uk/id/eprint/653

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