Reproducibility of the growth hormone response to sprint exercise
Stokes, K. A., Nevill, M. E., Lakomy, H. K. A. and Hall, G. M., 2003. Reproducibility of the growth hormone response to sprint exercise. Growth Hormone & IGF Research, 13 (6), pp. 336-340.
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Objective: There is a large inter-individual variation in the growth hormone (GH) response to exercise, but within-individual variation is unknown. The purpose of this study was to determine the reproducibility of the GH response to a single 30s sprint on a cycle ergometer. Design: Eleven non-obese male volunteers completed two trials separated by at least seven days during which they completed a single all-out 30s sprint on a cycle ergometer followed by 60 min of rest. Blood samples were taken at rest and at regular intervals post-exercise. Results: No differences were found in mean power output during the sprint, or in peak blood lactate concentrations or lowest measured pH following the sprints. Re-test correlation was significant for both peak GH concentrations (r = 0.97, P < 0.05) and GH AUC (r = 0.97, P < 0.05). Within-subject error (change in mean typical error) of the peak GH concentrations and GH area under the curve (AUC) was 4.3 +/- 3.4 mug l(-1) and 2.9 +/- 54.3 min mug l(-1), respectively. Within-subject percentage error (percentage change in mean +/- typical percentage error) for peak GH concentration and GH AUC was 33.5 +/- 26.7% and 1.1 +/- 20.0%, respectively. Conclusion: Growth hormone AUC is a reproducible measure of the GH response to sprint exercise. (C) 2003 Elsevier Ltd. All rights reserved.
|Creators||Stokes, K. A., Nevill, M. E., Lakomy, H. K. A. and Hall, G. M.|
|Departments||Faculty of Humanities & Social Sciences > Health|
|Additional Information||ID number: ISI:000187121000006|
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