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 colostr um supplementation (Bioenervi) on serum insulin-like growth factor I ( IGF-I), immunoglobulin CT, hormone, and amino acid and saliva immunogl obulin A concentrations during a strength and speed training period. N ine male sprinters and jumpers underwent three randomized experimental training treatments of 8 days separated by 13 days. The only differen ce in the treatments was the drink of 125 ml consumed per day. Posttra ining increases were noticed for serum IGF-I in the 25-ml Bioenervi tr eatment (125 ml contained 25 ml Bioenervi) and especially in the 125-m l Bioenervi treatment (125 mi contained 125 ml Bioenervi) compared wit h the placebo (normal milk whey) treatment (P < 0.05). The change in I GF-I concentration during the 8-day periods correlated positively with the change in insulin concentration during the same periods with 25-m l 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 t he three treatments. It appears that a bovine colostrum supplement (Bi oenervi) may increase serum IGF-I concentration in athletes during str ength and speed training.