Format

Send to

Choose Destination
Oxid Med Cell Longev. 2015;2015:804794. doi: 10.1155/2015/804794. Epub 2015 Mar 22.

Training effects on ROS production determined by electron paramagnetic resonance in master swimmers.

Author information

1
Istituto di Bioimmagini e di Fisiologia Molecolare, Consiglio Nazionale delle Ricerche, Via Fratelli Cervi 93, 20090 Segrate, Italy.
2
Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università di Milano, Via Fratelli Cervi 93, 20090 Segrate, Italy ; Istituto per lo Studio delle Macromolecole, Consiglio Nazionale delle Ricerche, Via Bassini 15, 20133 Milano, Italy.
3
Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università di Milano, Via Fratelli Cervi 93, 20090 Segrate, Italy.
4
Istituto di Bioimmagini e di Fisiologia Molecolare, Consiglio Nazionale delle Ricerche, Via Fratelli Cervi 93, 20090 Segrate, Italy ; Università Telematica S. Raffaele Roma, Via F. Daverio 7, 20122 Milano, Italy.
5
EDEL Therapeutics S.A., PSE-B/EPFL, 1015 Lausanne, Switzerland.

Abstract

Acute exercise induces an increase in Reactive Oxygen Species (ROS) production dependent on exercise intensity with highest ROS amount generated by strenuous exercise. However, chronic repetition of exercise, that is, exercise training, may reduce exercise-induced oxidative stress. Aim of this study was to evaluate the effects of 6-weeks high-intensity discontinuous training (HIDT), characterized by repeated variations of intensity and changes of redox potential, on ROS production and antioxidant capacity in sixteen master swimmers. Time course changes of ROS generation were assessed by Electron Paramagnetic Resonance in capillary blood by a microinvasive approach. An incremental arm-ergometer exercise (IE) until exhaustion was carried out at both before (PRE) and after (POST) training (Trg) period. A significant (P < 0.01) increase of ROS production from REST to the END of IE in PRE Trg (2.82 ± 0.66 versus 3.28 ± 0.66 µmol·min(-1)) was observed. HIDT increased peak oxygen consumption (36.1 ± 4.3 versus 40.6 ± 5.7 mL·kg(-1)·min(-1) PRE and POST Trg, resp.) and the antioxidant capacity (+13%) while it significantly decreased the ROS production both at REST (-20%) and after IE (-25%). The observed link between ROS production, adaptive antioxidant defense mechanisms, and peak oxygen consumption provides new insight into the correlation between ROS response pathways and muscle metabolic function.

PMID:
25874024
PMCID:
PMC4385700
DOI:
10.1155/2015/804794
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Hindawi Limited Icon for PubMed Central
Loading ...
Support Center