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Training does not affect protein turnover in pre- and early pubertal female gymnasts

Boisseau, N., Persaud, C., Jackson, A.A. and Poortmans, J.R. (2005) Training does not affect protein turnover in pre- and early pubertal female gymnasts European Journal of Applied Physiology and Occupational Physiology, 94, (3), pp. 262-267. (doi:10.1007/s00421-004-1264-5).

Record type: Article

Abstract

This study compared protein turnover in ten young female gymnasts [10.3 (0.5) years] engaged in regular intense physical training with ten age-matched controls [9.4 (0.6) years)]. Nitrogen flux ( Q), protein synthesis (PS), protein degradation (PD) and net protein turnover (NPB = PS–PD) were measured following a single oral dose of [15N]-glycine. The habitual dietary intake of each subject was assessed using a 7-day food record, with food portions being weighed before ingestion. The gymnasts had a low total energy intake which was unbalanced in the proportions of lipid, carbohydrate and protein. Protein flux was 7.19 (0.35) g.kg–1.day–1 in the gymnasts and 7.53 (0.81) g.kg–1.day–1 in the controls; protein synthesis was 6.06 (0.27) g.kg–1.day–1 in the gymnasts and 6.53 (0.74) g.kg–1.day–1 in the controls; protein degradation was 5.45 (0.38) g.kg–1.day–1 in the gymnasts and 5.27 (0.74) g.kg–1.day–1 in the controls. All data are presented as means and standard errors of the mean (SEM). There were no statistical differences for protein flux, protein synthesis or protein degradation between the two groups. However, NPB was lower (–14%) in the trained gymnasts than in the control group ( P <0.05), which might be explained by a greater protein ingestion in the control group on the day of the protocol ( P <0.05). These results show that in pre- and early pubertal female gymnasts intense training does not exert a demonstrable effect on protein turnover.

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More information

Published date: 2005
Keywords: excercise, training, children, protein turnover, [15N]-glycine

Identifiers

Local EPrints ID: 25267
URI: http://eprints.soton.ac.uk/id/eprint/25267
ISSN: 0301-5548
PURE UUID: 2ec4f7c7-98eb-45c8-9e21-ece3a27e0643

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Date deposited: 06 Apr 2006
Last modified: 17 Jul 2017 16:11

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Contributors

Author: N. Boisseau
Author: C. Persaud
Author: A.A. Jackson
Author: J.R. Poortmans

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