Effects of bicarbonate on oxyhaemoglobin desaturation and exercise performance in athletes

Effects of bicarbonate on oxyhaemoglobin desaturation and exercise performance in athletes

Author Bargieri, Julia do Valle Autor UNIFESP Google Scholar
Berton, Danilo Cortozi Autor UNIFESP Google Scholar
Almeida, Alexandre Aparecido de Autor UNIFESP Google Scholar
Garcia, Fernanda Asprón Autor UNIFESP Google Scholar
Silva, Antônio Carlos da Autor UNIFESP Google Scholar
Neder, Jose Alberto Autor UNIFESP Google Scholar
Andrade, Marilia dos Santos Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Univ Fed Rio Grande do Sul
Abstract Aim. Decrease in peripheral oxygen delivery may impact exercise performance in athletes with exercise-related arterial oxygen desaturation (ERD). We evaluated whether sodium bicarbonate ingestion would be effective to reduce ERD and what is the consequences upon exercise performance.Methods. Seventy highly trained athletes performed an incremental treadmill cardiopulmonary exercise test (incCPX) and a high intensity constant speed test (ctCPX) on separate days. Subjects who developed ERD by pulse oximetry were randomly allocated to oral sodium bicarbonate or placebo during 5 days. At the end of treatment subjects repeated both tests.Results. ERD prevalence was 33% during the incCPX (17 % severe, 48% moderate and 35% mild) and 34% (5 % severe, 37% moderate and 58% mild) in the ctCPX. Athletes who developed ERD have greater aerobic capacity (incCPX) and endurance time (ctCPX). Active treatment, but not placebo, reduced ERD during ctCPX (P<0.05). However, there were no significant positive effects on main parameters of aerobic function and endurance exercise capacity (P>0.05).Conclusion. Sodium bicarbonate was effective in lessening ERD during ctCPX in athletes. However, this intervention failed to improve maximal and submaximal exercise capacity in these subjects.
Keywords Exercise
Language English
Sponsor FINEP
Ministerio do Esporte (Brazil)
Date 2013-10-01
Published in Journal Of Sports Medicine And Physical Fitness. Turin: Edizioni Minerva Medica, v. 53, n. 5, p. 470-476, 2013.
ISSN 0022-4707 (Sherpa/Romeo, impact factor)
Publisher Edizioni Minerva Medica
Extent 470-476
Origin https://www.minervamedica.it/en/journals/sports-med-physical-fitness/article.php?cod=R40Y2013N05A0470
Access rights Closed access
Type Article
Web of Science ID WOS:000327232800003
URI http://repositorio.unifesp.br/11600/44698

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