Document Detail


The Effects of Chronic Sodium Bicarbonate Ingestion and Interval Training in Highly-Trained Rowers.
MedLine Citation:
PMID:  22899814     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Recent research has reported performance improvements following chronic NaHCO3 ingestion in conjunction with high-intensity interval training (HIT) in moderately-trained athletes. The purpose of the current study was to determine the effects of altering plasma H+ concentration during HIT through NaHCO3 ingestion over 4-weeks (2 HIT sessions per week) in 12 Australian representative rowers (mean ± SD; age = 22 ± 3years; mass = 76.4 ± 4.2kg; VO2 peak = 65.50 ± 2.74mL.kg.-1min.-1). Baseline testing included a 2000m time-trial and an incremental exercise test. Following baseline testing rowers were allocated to either a chronic NaHCO3 (ALK) or Placebo (PLA) group. Starting 90 minutes prior to each HIT session, subjects were required to ingest a 0.3g.kg-1 body mass dose of NaHCO3 or a placebo substance. Finger-tip blood samples were taken throughout the study to analyze bicarbonate and pH levels. The ALK group did not produce any additional improvements in 2000m rowing performance time when compared to PLA (P > 0.05). Magnitude-based inferential analysis indicated an unclear/trivial effect on 2000m power, 2000m time, peak power output and power at 4mmol.L-1 lactate threshold in the ALK group when compared to the PLA. Although there was no difference between groups, during the study there was a significant mean (±SD) 2000m power improvement in both the ALK and PLA groups of 17.8 ± 14.5 and 15.2 ± 18.3 watts respectively. In conclusion, despite overall improvements in rowing performance following 4-weeks of HIT, the addition of chronic NaHCO3 supplementation during the training period did not significantly enhance performance further.
Authors:
Matthew W Driller; John R Gregory; Andrew D Williams; James W Fell
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-14
Journal Detail:
Title:  International journal of sport nutrition and exercise metabolism     Volume:  -     ISSN:  1543-2742     ISO Abbreviation:  Int J Sport Nutr Exerc Metab     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100939812     Medline TA:  Int J Sport Nutr Exerc Metab     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Physiology, Australian Institute of Sport, Canberra, Australia.
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