[…] HERE Broenfeld pretty much owns John Ivy, a highly-respected researcher in the area of nutrient timing (he actually wrote the book on nutrient timing – literally!). I’m disappointed that John hasn’t yet responded – it makes him lose points in my book. Either step up to the challenge John, or change your views. By the way, I read the book Nutrient Timing when it first came out in 2004, but I’ve since updated my views due to Alagon and Broenfeld’s reviews of the research. It is quite clear that the importance of the “anabolic window” for the common lifter is grossly exaggerated. […]
The effect of muscle strength training on glucose tolerance and the insulin response after glucose feeding was investigated in eight healthy male subjects. Glucose tolerance and the associated insulin response was assessed using a standard 100-g oral glucose load before and after a supervised 10-wk high-resistance, isotonic weight-lifting program. Blood samples were drawn before and at 30, 60, 90, 120, and 150 min after ingestion of glucose. Areas under the glucose and insulin curves were used to determine differences between treatments. Muscle strength training increased body weight % and lean body mass by %, but had no effect on fat mass as determined by hydrostatic weighing. Glucose tolerance was not changed by the training program. However, a significant reduction in the basal plasma insulin concentration (%) and the area under the insulin response curve (%) was found (P less than ). This reduction in the insulin response was significantly correlated (r = ; P less than ) with the increase in lean body mass. These results suggest that the increased muscle mass resulting from strength training was responsible for the attenuated insulin response to a standard 100-g oral glucose challenge.