title: Effect of bovine colostrum on anaerobic exercise performance and plasma insulin-like growth factor I.
abstract: In this study, we examined the effects of bovine colostrum on peak vertical jump power (VJpeak), peak cycle power (CPpeak), alactic anaerobic work capacity, resistance exercise one-repetition maxima (1-RM) and plasma insulin-like growth factor I (IGF-I) concentrations. Using a randomized, double-blind, placebo-controlled, parallel design, 51 males completed 8 weeks of resistance and plyometric training while consuming 60 g x day(-1) of bovine colostrum (n = 26) or concentrated whey protein powder (n = 25). Peak vertical jump power, peak cycle power, alactic anaerobic work capacity, 1-RM and plasma IGF-I were not different between groups at baseline (P > 0.33). Peak vertical jump power and peak cycle power were still not significantly different between groups by week 4 (VJpeak: bovine colostrum, 7231 +/- 488 W; whey protein, 7214 +/- 530 W; P = 0.99; CPpeak: bovine colostrum, 1272 +/- 202 W; whey protein, 1232 +/- 208 W; P = 0.99). By week 8, however, peak vertical jump power (bovine colostrum, 7370 +/- 503 W; whey powder, 7237 +/- 481 W; 95% confidence intervals, 54 to 170 W; P < 0.01) and peak cycle power (bovine colostrum, 1400 +/- 215 W; whey protein, 1311 +/- 192 W; 95% confidence intervals, 20 to 61 W; P < 0.01) were significantly higher in the bovine colostrum condition. Alactic anaerobic work capacity and 1-RM increased (P < 0.001), but the increases were not different between groups (P > 0.08). Plasma IGF-I did not change in either group (P = 0.55). We conclude that bovine colostrum supplementation during training significantly increased peak anaerobic power, but had no effect on alactic anaerobic work capacity, 1-RM or plasma IGF-I.
authors.affiliation: School of Health Sciences, University of South Australia, Holbrooks Road, Underdale, SA 5032, Australia. j.buckley@unisa.edu.au
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Buckley
authors.forename: Grant D
authors.initials: GD
authors.lastname: Brinkworth
authors.forename: Marion J
authors.initials: MJ
authors.lastname: Abbott
mesh_terms: D000293:Adolescent; D000328:Adult; D015308:Anaerobic Threshold / Q000187:drug effects* / Q000502:physiology*; D000818:Animals; D015415:Biomarkers / Q000097:blood; D001827:Body Height / Q000502:physiology; D015992:Body Mass Index; D002417:Cattle; D019587:Dietary Supplements; D004311:Double-Blind Method; D004435:Eating / Q000187:drug effects / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D006133:Growth Substances / Q000494:pharmacology*; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000032:analysis* / Q000187:drug effects*; D008297:Male; D008894:Milk Proteins; D009043:Motor Activity / Q000187:drug effects / Q000502:physiology; D010806:Physical Education and Training
chemical_list: D015415:Biomarkers; D006133:Growth Substances; D008894:Milk Proteins; C041826:colostrum growth factor; D007334:Insulin-Like Growth Factor I