So i dont have any RESEARCH to back this up. This is all completely personal experience... but I've experienced this twice now:<p>( two periods of ~ 2 day introduction period followed by 2 subsequent days of "starvation" )<p>limiting caloric intake SERIOUSLY switches up my focus what its like while working. ( noticeable increase )<p>DISCLAIMER:
- I don't hold back on gratuitous intake of BLACK coffee, the occasional TEA, and water. Also multivitamins and intake of protein ( I'm not in this to lose MUSCLE )<p>Now I don't recommend this if you're seriously underweight .. I'd say I've got ~10 lbs of extra body fat.<p>NOTE 1:
the first 2 days are HELL, your body HATES YOU. After than I've been eating no more than 1 meal a day @ sub 600 cal<p>NOTE 2:
I also consistently break out 10 - 20 pushups at work, home, wherever ( also a good practice for the intro period to get your mind off the hunger pains )<p>The focus that i experience is sooo wonderfully even keel and persistent, though I'd recommend having LOTS of work to do ( multiple projects to switch back and forth between )<p>you'll need it, especially for the first two days =]