No Cover Image

Journal article 464 views 97 downloads

Influence of training status and exercise modality on pulmonary O2 uptake kinetics in pubertal girls / Melitta McNarry, Joanne R. Welsman, Andrew M. Jones

European Journal of Applied Physiology, Volume: 111, Issue: 4, Pages: 621 - 631

Swansea University Author: Melitta McNarry

DOI (Published version): 10.1007/s00421-010-1681-6

Abstract

The influence of training status on the oxygen uptake ( O2) response to heavy intensity exercise in pubertal girls has not previously been investigated. We hypothesised that whilst training status-related adaptations would be evident in the O2, heart rate (HR) and deoxyhemoglobin ([HHb]) kinetics of...

Full description

Published in: European Journal of Applied Physiology
Published: 2010
URI: https://cronfa.swan.ac.uk/Record/cronfa26159
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: The influence of training status on the oxygen uptake ( O2) response to heavy intensity exercise in pubertal girls has not previously been investigated. We hypothesised that whilst training status-related adaptations would be evident in the O2, heart rate (HR) and deoxyhemoglobin ([HHb]) kinetics of pubertal swimmers during both lower and upper body exercise, they would be more pronounced during upper body exercise. Eight swim-trained (T; 14.2±0.7 years) and eight untrained (UT; 14.5±1.3 years) girls completed a number of constant-work-rate transitions on cycle and upper body ergometers at 40% of the difference between the gas exchange threshold and peak O2. The phase II O2 time constant (τ) was significantly shorter in the trained girls during both cycle (T: 21 ± 6 vs. UT: 35 ± 11 s; P<0.01) and upper body exercise (T: 29 ± 8 vs. UT: 44 ± 8 s; P<0.01). The O2 slow component was not influenced by training status. The [HHb] τ was significantly shorter in the trained girls during both cycle (T: 12 ± 2 vs. UT: 20 ± 6 s; P<0.01) and upper body exercise (T: 13 ± 3 vs. UT: 21 ± 7 s; P<0.01), as was the HR τ (cycle, T: 36 ± 5 vs. UT: 53 ± 9 s; upper body, T: 32 ± 3 vs. UT: 43 ± 2; P<0.01). This study suggests that both central and peripheral factors contribute to the faster O2 kinetics in the trained girls and that differences are evident in both lower and upper body exercise.
Keywords: Oxygen uptake kinetics; near-infrared spectroscopy; training, children; adolescents; upper body exercise
College: College of Engineering
Issue: 4
Start Page: 621
End Page: 631