Yea I also had concerns as well about "starvation mode" before reading the book. I found it very compelling though because the guy that wrote it was a research analyst for a major supplement company. He understands his science pretty well, considering his job consisted of analyzing research papers, and compiled this short, but in depth book of research surrounding fasting. Come to find out when you exercise your fat burning hormones are released, not surprisingly, and your insulin sensitivity also improves. Well more or less the same thing occurs during a short fast 18-36 hour fast (18-24 generally what he recommend, but the benefits extend to aprx. 36). You would think that this would cause catabolism of muscle tissue, but when on just a 3x a week muscle resistance program your muscle is not broken down.(he cites a study where people were on a 1200 calorie diet for ~12-20 weeks, muscle resistance 3x week and didn't lose any muscle). The main idea that he brings to the table is the manipulation of insulin, when no carbs (glucose) are consumed(our main diet in this country) human growth hormone is biochemically able to circulate more freely( could not tell you the advanced biochem but basically, insulin up human growth down, human growth up insulin down. So if thats the case short fasts are an excellent way to synergistically work with exercising (i've been trying it and it seems to be exploding my fat loss results) but also allows muscle retention(human growth hormone--and hgh release is a sign glucagon is also more likely released in the body (fat burning)) and markers of health (insulin sensitivity, reduced inflammation, oxidative damage, cellular stress resistance.).
haha sorry for the long post but I find this so interesting. From a more historical anthropological perspective I don't think our bodies were meant to eat as much as we do and intermittent fasting seems like a good way to not only give the body a break from all of the chemical reactions (food) stress on organs, but also, considering fat burning hormones are released during a fast, it points the more obvious observation that:
eat food - hormones for storing it released
don't eat- hormones for burning it released
Also I think we just have an innate fear of starving so I feel like that skews our interpretation of what it means to be hungry in our society where we have so much
"Declare the past, diagnose the present, foretell the future."
| Pounds lost: 4.0