Int J Sports Med 2006; 27(9): 760
DOI: 10.1055/s-2006-924369
Letters to the Editor

© Georg Thieme Verlag KG Stuttgart · New York

The Authors' Reply - Letter to the Editor

V. Leibetseder1
  • 1Center for Physiology and Pathophysiology, Medical University Vienna, Austria
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Publikationsverlauf

Publikationsdatum:
30. August 2006 (online)

Dear Editor,

Thank you for the opportunity to reply to the Letter to the Editor by Dr. Maurice J. Arnaud regarding our paper:

Leibetseder V, Strauss-Blasche G, Marktl W, Ekmekcioglu C. Does oxygenated water support aerobic performance and lactate kinetics? Int J Sports Med 2006; 27: 232 - 235

We asked the subjects to drink the oxygenated water without any restriction, e.g., any special time or period of the day. As O2-water is offered by the industry as an “activating” drink without any additional recommendations, we wanted to analyse eventual effects by a most usual and practicable way of consumption. Therefore, we think that our study was appropriate to evaluate the effects of an everyday ingestion, like it is proposed by the manufacturers. We used glass bottles - which might additionally stabilize the O2-concentration - and we measured the concentration of O2 in the water very accurately (as described in Methods). Still, the actual O2-level of the water at the time of consumption was not assessable.

Our findings support the results of other studies that a measurable effect on exercise capacity by O2-water cannot be expected, and we agree with Dr. Arnaud that oxygenated water cannot increase oxygen supply to muscle. Therefore, a recommendation for sportsmen to drink O2-water (as it is brought into discussion by Dr. Arnaud) is difficult. At least until now, no study could show significant beneficial effects. Still, psychological and mental mechanisms might cause measurable effects, but this will have to be analysed by upcoming studies. Finally we do not share Dr. Arnaud's concerns that consuming O2-water might cause any health risk as the net-absorption of O2 in the gut is too low.

Dr. Valentin Leibetseder Specialist in Exercise Physiology

Center for Physiology and Pathophysiology
Medical University Vienna

Schwarzspanierstrasse 17

1090 Vienna

Austria

Telefon: + 43 14 27 76 21 13

Fax: + 43 14 27 76 21 99

eMail: Valentin.Leibetseder@meduniwien.ac.at