Document Detail


Oral bovine colostrum supplementation enhances buffer capacity but not rowing performance in elite female rowers.
MedLine Citation:
PMID:  12432178     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A randomized, double-blind, placebo controlled design was used in which 13 elite female rowers, all of whom had competed at World Championships, were supplemented with 60 g day-1 of either bovine colostrum (BC; n = 6) or concentrated whey protein powder (WP; n = 7) during 9 weeks of pre-competition training. All subjects undertook the study as a group and completed the same training program. Prior to, and after 9 weeks of supplementation and training, subjects completed an incremental rowing test (ROW1) on a rowing ergometer consisting of 3 3 4-min submaximal workloads and a 4-min maximal effort (4 max), each separated by a 1-min recovery period. The rowing test was repeated after a 15-min period of passive recovery (ROW2). The 4 max for ROW1 provided a measure of performance, and the difference between the 4 max efforts of ROW1 and ROW2 provided an index of recovery. Blood lactate concentrations and pH measured prior to exercise and at the end of each workload were used to estimate blood buffer capacity (beta). Food intake was recorded daily for dietary analysis. There were no differences in macronutrient intakes (p >.56) or training volumes (p >.99) between BC and WP during the study period. Rowing performance (distance rowed and work done) during 4 max of ROW2 was less than ROW1 at baseline (p <.05) but not different between groups (p >.05). Performance increased in both rows by Week 9 (p <.001), with no difference between groups (p >.75). However, the increase was greatest in ROW2 (p <.05), such that by Week 9 there was no longer a difference in performance between the two rows in either group (p >.05). b was not different between groups for ROW1 at baseline (BC 38.3 5.0, WP 38.2 7.2 slykes; p >.05) but was higher in BC by Week 9 (BC 40.8 5.9, WP 33.4 5.3 slykes; p <.05). b for ROW2 followed the same pattern of change as for ROW1. We conclude that supplementation with BC improves b, but not performance, in elite female rowers. It was not possible to determine whether b had any effect on recovery.
Authors:
Grant David Brinkworth; Jonathan David Buckley; Pitre Collier Bourdon; Jason Paul Gulbin; Adrian David
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sport nutrition and exercise metabolism     Volume:  12     ISSN:  1526-484X     ISO Abbreviation:  Int J Sport Nutr Exerc Metab     Publication Date:  2002 Sep 
Date Detail:
Created Date:  2002-11-14     Completed Date:  2003-01-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100939812     Medline TA:  Int J Sport Nutr Exerc Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  349-65     Citation Subset:  IM    
Affiliation:
Centre for Research in Education and Sports Science at the University of South Australia, Adelaide 5032, South Australia.
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MeSH Terms
Descriptor/Qualifier:
Administration, Oral
Adult
Animals
Buffers
Cattle
Colostrum* / physiology
Dietary Supplements*
Double-Blind Method
Exercise Test / drug effects
Female
Humans
Hydrogen-Ion Concentration
Lactates / blood
Milk Proteins / administration & dosage
Oxygen Consumption / physiology
Physical Exertion / drug effects*
Physical Fitness / physiology
Sports / physiology*
Chemical
Reg. No./Substance:
0/Buffers; 0/Lactates; 0/Milk Proteins; 0/whey protein

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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