Plasma antioxidants and lipid oxidation after submaximal resistance exercise in men

Autor(en)

Alfons Ramel, Karl Heinz Wagner, Ibrahim Elmadfa

Abstrakt

Background: An increased generation of reactive oxygen species occurs during exercise. The aim of the study: We investigated whether changes in plasma antioxidants and lipid oxidation products after submaximal resistance exercise are detectable, and whether training status has any effect on changes. Methods: Seven resistance trained (RT, 31.3 ± 10.2 yrs) and ten non-resistance trained male subjects (NRT, 28.2 ± 3.9 yrs) performed a submaximal resistance exercise circuit (10 different exercises, 75% of 1-repetition maximum, 18.6 ± 1.1 minutes). Blood samples were taken before and immediately after exercise. Plasma antioxidants (AO), lipid oxidation products malondialdehyde (MDA) and conjugated dienes (CD) were measured using HPLC and/or photometric detection. Groups were compared using the Mann-Whitney U test, the exercise effect was tested using the Wilcoxon signed ranks test. P < 0.05 was regarded as significant. Results: α-Tocopherol, γ-tocopherol, β-carotene, lycopene, ascorbic acid, MDA and CD concentrations did not differ between groups at rest. There was a similar increase of fat soluble plasma AO in both groups after exercise, but not ascorbic acid. MDA increased also in both groups after exercise, but CD increased only in NRT. Conclusion: There is no difference in plasma AO and lipid oxidation products in RT and NRT at rest. After short time resistance exercise there is a mobilization of fat soluble AO. Despite mobilization of AO, oxidative stress occurs during submaximal resistance exercise, which is indicated by increased MDA and CD concentrations. As exercise induced an increase of CD only in NRT, it seems that regular resistance training partly prevents lipid peroxidation during exercise.

Organisation(en)

Department für Ernährungswissenschaften

Externe Organisation(en)

University of Iceland

Journal

European Journal of Nutrition

Band

43

Seiten

2-6

Anzahl der Seiten

5

ISSN

1436-6207

DOI

https://doi.org/10.1007/s00394-004-0432-z

Publikationsdatum

02-2004

Peer-reviewed

Ja

ÖFOS 2012

303009 Ernährungswissenschaften

Schlagwörter

ASJC Scopus Sachgebiete

Medicine (miscellaneous), Nutrition and Dietetics

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/plasma-antioxidants-and-lipid-oxidation-after-submaximal-resistance-exercise-in-men(6c8db117-1eae-427b-aad2-6615b2c78c3f).html