Effects of bovine colostrum supplementation on serum IGF-I, IgG, hormone, and saliva IgA during training.
The purpose of this study was to examine the effects of bovine colostrum supplementation (Bioenervi) on serum insulin-like growth factor I (IGF-I), immunoglobulin G, hormone, and amino acid and saliva immunoglobulin A concentrations during a strength and speed training period. Nine male sprinters and jumpers underwent three randomized experimental training treatments of 8 days separated by 13 days. The only difference in the treatments was the drink of 125 ml consumed per day. Posttraining increases were noticed for serum IGF-I in the 25-ml Bioenervi treatment (125 ml contained 25 ml Bioenervi) and especially in the 125-ml Bioenervi treatment (125 ml contained 125 ml Bioenervi) compared with the placebo (normal milk whey) treatment (P < 0.05). The change in IGF-I concentration during the 8-day periods correlated positively with the change in insulin concentration during the same periods with 25-ml Bioenervi treatment (r = 0.68; P = 0.045) and with 125-ml Bioenervi treatment (r = 0.69; P = 0.038). Serum immunoglobulin G, hormone, and amino acid and saliva immunoglobulin A responses were similar during the three treatments. It appears that a bovine colostrum supplement (Bioenervi) may increase serum IGF-I concentration in athletes during strength and speed training.
Mero
A
A
Department of Biology of Physical Activity, University of Jyväskylä, 40351 Jyväskylä, Finland.
Miikkulainen
H
H
Riski
J
J
Pakkanen
R
R
Aalto
J
J
Takala
T
T
D000328:Adult; D000818:Animals; D002417:Cattle; D003126:Colostrum / Q000502:physiology*; D018592:Cross-Over Studies; D004311:Double-Blind Method; D006728:Hormones / Q000097:blood*; D006801:Humans; D007070:Immunoglobulin A / Q000378:metabolism*; D007074:Immunoglobulin G / Q000378:metabolism*; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D008297:Male; D009747:Nutritional Physiological Phenomena; D010809:Physical Fitness / Q000502:physiology*; D012463:Saliva / Q000378:metabolism; D014142:Track and Field
D006728:Hormones; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007334:Insulin-Like Growth Factor I