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DOSE EFFECTS OF ORAL BOVINE COLOSTRUM SUPPLEMENT (INTACT®) ON PHYSICAL WORK CAPACITY IN CYCLISTS
JS Coombes1, M Conacher, SK Austen, PA Marshall
1University of Queensland, Australia
Recent studies have reported that concentrated oral bovine colostrum protein supplementation at 60 g/day improves jumping and rowing performance and recovery in treadmill running. The purpose of this study was to determine the dose effect of bovine colostrum (intact® concentrated colostrum protein, Numico Research Australia Pty Ltd) ingestion on cycling performance. Forty-two competitive cyclists were randomly divided into three groups and required to consume daily either 1) 20 g/day bovine colostrum + 40 g whey protein concentrate (wpc), 2) 60 g of bovine colostrum or 3) 60 g of wpc. Performance was assessed by two measures before (pre) and after (post) an 8 week supplementation (supp.) period. The tests were designed to determine, 1) the amount of work completed in a second VO2max test as a percentage of an initial VO2max test and 2) the time to complete 2.8kj/kg following a two hour cycle at 65% VO2max. Subjects were required to maintain their regular training program and keep a food and training diary. Whilst results showed that subjects in all groups performed more work during a second VO2max test post supp. compared to pre supp., these improvements were not significant (placebo = 3.4%, 20 g = 4.0%, 60 g = 3.9%). Subjects in the 20g and 60g groups completed the time trial significantly (p<0.05) faster post supp. compared to pre supp. (improvements in performance times (sec), placebo = 37, 20g = 158, 60g = 134). These results indicates that oral bovine colostrum supplementation at 20g or 60g/day improves physical work capacity in cyclists.
Proceedings of and oral presentation by Dr. Jeff Coombs to:
Sports Medicine and Physical Education International Congress on Sport Science - 2000 Pre-Olympic Congress Brisbane, Sept 7-13, 2000.
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