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Sex-dependent responses to acute sodium bicarbonate different dose treatment: A randomized double-blind crossover study
K. Durkalec-Michalski, PM. Nowaczyk, B. Saunders, A. Carr, J. Kamińska, M. Steffl, T. Podgórski
Language English Country Australia
Document type Journal Article, Randomized Controlled Trial
NLK
ProQuest Central
from 2007-08-01 to 2 months ago
Nursing & Allied Health Database (ProQuest)
from 2007-08-01 to 2 months ago
Health & Medicine (ProQuest)
from 2007-08-01 to 2 months ago
- MeSH
- Adult MeSH
- Double-Blind Method MeSH
- Sodium Bicarbonate * administration & dosage pharmacology blood MeSH
- Cross-Over Studies * MeSH
- Performance-Enhancing Substances administration & dosage pharmacology MeSH
- Humans MeSH
- Young Adult MeSH
- Sex Factors MeSH
- Exercise Test MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Young Adult MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Randomized Controlled Trial MeSH
OBJECTIVES: This study quantified blood bicarbonate (HCO3-) kinetics and gastrointestinal upset to determine the gender-related ergogenic potential of sodium bicarbonate (0.15-, 0.25- and 0.35 gSB·kgFat-free mass (FFM)-1) in high intensity functional training. DESIGN: Double-blind randomized placebo-controlled crossover. METHODS: Thirty female and male athletes performed two bouts of the Wingate Anaerobic Test (WAnTPRE-HIFT and WAnTPOST-HIFT) interspaced with two 3-min bouts of Wall Balls and Burpees 120 min after ingestion of three sodium bicarbonate doses. Blood HCO3- was determined pre-ingestion, after supplementation and before/post exercise. Gastrointestinal upset was evaluated 120 min post-ingestion. Control (CTRL) measurements were performed. RESULTS: There were significant gender × treatment interactions for: changes in blood HCO3- at 60 min post-ingestion (p = 0.014; η2p = 0.104; at 0.15 gSB·kgFFM-1 males experienced higher increase than females); peak power (p = 0.015; η2p = 0.103) and average power (p = 0.005; η2p = 0.124) during WAnTPOST-HIFT, and changes in peak power between the Wingate Anaerobic Test bouts (p = 0.049; η2p = 0.081). Sodium bicarbonate compared to PLA had no significant impact on Wall Balls and Burpees performance. The dose of 0.35 gSB·kgFFM-1 resulted in higher less severe gastrointestinal symptoms compared to CTRL and 0.15 gSB·kgFFM-1 (p = 0.001; W = 0.178); and higher total gastrointestinal upset compared to CTRL, PLA and 0.15 gSB·kgFFM-1 (p < 0.001; W = 0.323). CONCLUSIONS: There were dose- and gender-related differences in extracellular buffering capacity and ergogenic potential of sodium bicarbonate. The study suggested a detrimental impact of gastrointestinal upset on performance.
Centre for Sport Research Deakin University Australia
Department of Physiology and Biochemistry Poznan University of Physical Education Poland
Department of Sports Dietetics Poznan University of Physical Education Poland
Institute of Orthopedics and Traumatology Faculty of Medicine FMUSP University of São Paulo Brazil
References provided by Crossref.org
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- $a Durkalec-Michalski, Krzysztof $u Department of Sports Dietetics, Poznan University of Physical Education, Poland; Sport Sciences-Biomedical Department, Faculty of Physical Education and Sport, Charles University, Czech Republic; Centre for Sport Research, Deakin University, Australia. Electronic address: durkalec-michalski@awf.poznan.pl
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- $a OBJECTIVES: This study quantified blood bicarbonate (HCO3-) kinetics and gastrointestinal upset to determine the gender-related ergogenic potential of sodium bicarbonate (0.15-, 0.25- and 0.35 gSB·kgFat-free mass (FFM)-1) in high intensity functional training. DESIGN: Double-blind randomized placebo-controlled crossover. METHODS: Thirty female and male athletes performed two bouts of the Wingate Anaerobic Test (WAnTPRE-HIFT and WAnTPOST-HIFT) interspaced with two 3-min bouts of Wall Balls and Burpees 120 min after ingestion of three sodium bicarbonate doses. Blood HCO3- was determined pre-ingestion, after supplementation and before/post exercise. Gastrointestinal upset was evaluated 120 min post-ingestion. Control (CTRL) measurements were performed. RESULTS: There were significant gender × treatment interactions for: changes in blood HCO3- at 60 min post-ingestion (p = 0.014; η2p = 0.104; at 0.15 gSB·kgFFM-1 males experienced higher increase than females); peak power (p = 0.015; η2p = 0.103) and average power (p = 0.005; η2p = 0.124) during WAnTPOST-HIFT, and changes in peak power between the Wingate Anaerobic Test bouts (p = 0.049; η2p = 0.081). Sodium bicarbonate compared to PLA had no significant impact on Wall Balls and Burpees performance. The dose of 0.35 gSB·kgFFM-1 resulted in higher less severe gastrointestinal symptoms compared to CTRL and 0.15 gSB·kgFFM-1 (p = 0.001; W = 0.178); and higher total gastrointestinal upset compared to CTRL, PLA and 0.15 gSB·kgFFM-1 (p < 0.001; W = 0.323). CONCLUSIONS: There were dose- and gender-related differences in extracellular buffering capacity and ergogenic potential of sodium bicarbonate. The study suggested a detrimental impact of gastrointestinal upset on performance.
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