Journal article 1109 views 271 downloads
Influence of training status and exercise modality on pulmonary O2 uptake kinetics in pubertal girls
Melitta McNarry 
,
Joanne R. Welsman,
Andrew M. Jones
,
Joanne R. Welsman,
Andrew M. Jones
European Journal of Applied Physiology, Volume: 111, Issue: 4, Pages: 621 - 631
Swansea University Author:
Melitta McNarry
-
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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...
| Published in: | European Journal of Applied Physiology |
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| Published: |
2010
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa26159 |
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| 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. |
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| Keywords: |
Oxygen uptake kinetics; near-infrared spectroscopy; training, children; adolescents; upper body exercise |
| College: |
Faculty of Science and Engineering |
| Issue: |
4 |
| Start Page: |
621 |
| End Page: |
631 |