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The effects of chronic sodium bicarbonate ingestion and interval training in highly trained rowers

Citation

Driller, MW and Gregory, JR and Williams, AD and Fell, JW, The effects of chronic sodium bicarbonate ingestion and interval training in highly trained rowers, International Journal of Sport Nutrition and Exercise Metabolism, 23, (1) pp. 40-47. ISSN 1526-484X (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Human Kinetics, Inc.

DOI: doi:10.1123/ijsnem.23.1.40

Abstract

Recent research has reported performance improvements after 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 wk (2 HIT sessions/wk) in 12 Australian representative rowers (MSD; age 223 yr, mass 76.4 4.2 kg, VO2peak 65.50 2.74 ml kg -1 min-1). Baseline testing included a 2,000-m time trial and an incremental exercise test. After baseline testing, rowers were allocated to either a chronic NaHCO3 (ALK) or placebo (PLA) group. Starting 90 min before each HIT session, subjects ingested a 0.3-g/kg body mass dose of NaHCO3 or a placebo substance. Fingertip blood samples were taken throughout the study to analyze bicarbonate and pH levels. The ALK group did not produce any additional improvements in 2,000-m rowing performance time compared with PLA (p>.05). Magnitude-based inferential analysis indicated an unclear or trivial effect on 2,000-m power, 2,000-m time, peak power output, and power at 4 mmol/L lactate threshold in the ALK group compared with the PLA group. Although there was no difference between groups, during the study there was a significant mean (SD) 2,000-m power improvement in both the ALK and PLA groups of 17.814.5 and 15.218.3 W, respectively. In conclusion, despite overall improvements in rowing performance after 4 wk of HIT, the addition of chronic NaHCO3 supplementation during the training period did not significantly enhance performance further.

Item Details

Item Type:Refereed Article
Keywords:rowing, VO2max, performance, alkalosis, pH, NaHCO3
Research Division:Medical and Health Sciences
Research Group:Human Movement and Sports Science
Research Field:Exercise Physiology
Objective Division:Health
Objective Group:Other Health
Objective Field:Health not elsewhere classified
Author:Driller, MW (Dr Matthew Driller)
Author:Gregory, JR (Mr John Gregory)
Author:Williams, AD (Associate Professor Andrew Williams)
Author:Fell, JW (Associate Professor James Fell)
ID Code:79839
Year Published:2013
Web of Science® Times Cited:14
Deposited By:Health Sciences A
Deposited On:2012-10-05
Last Modified:2017-11-01
Downloads:0

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