The effect of an increased training volume on oxidative stress

Knez, W. L., Jenkins, D. G. and Coombes, J. S. (2014) The effect of an increased training volume on oxidative stress. International Journal of Sports Medicine, 35 1: 8-13. doi:10.1055/s-0033-1333746

Author Knez, W. L.
Jenkins, D. G.
Coombes, J. S.
Title The effect of an increased training volume on oxidative stress
Journal name International Journal of Sports Medicine   Check publisher's open access policy
ISSN 0172-4622
Publication date 2014-01
Year available 2013
Sub-type Article (original research)
DOI 10.1055/s-0033-1333746
Open Access Status
Volume 35
Issue 1
Start page 8
End page 13
Total pages 6
Place of publication Stuttgart, Germany
Publisher Georg Thieme
Collection year 2014
Language eng
Abstract This study examined the influence of training volume on resting and exercise-induced plasma markers of oxidative stress (MDA concentration) and antioxidant status (GPX, CAT & SOD erythrocyte activities). Moderately trained participants (TG) (n=6; 4 males and 2 females; 25±1.8 years) and sedentary control subjects (CG) participated in the 8-week investigation. The TG increased their training volume from ~4.9 to ~18 h.wk-1 by the end of the investigation. Before the increase in training volume and at 2-week intervals the TG completed a 30 km cycling time trial (TT30) where resting-and post-exercise blood was -sampled and analysed for oxidative stress and antioxidant status. The CG had their resting blood sampled and analysed fortnightly. The data showed that TT30 performance improved in the first 4 weeks but remained unchanged in the last 4. Resting plasma MDA and CAT increased in response to training, with no change in the resting activities of erythrocyte GPX and SOD. Post-TT30 MDA and CAT increased over the training period and training hours positively related to both resting-and post-TT30 MDA. The increase in resting MDA and the up-regulation in CAT in response to an increased training volume may have a role in the identification of a training and performance plateau.
Keyword Antioxidants
Endurance training
Exercise physiology
Lipid peroxidation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 9 July 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Health and Rehabilitation Sciences Publications
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