I've just started the cutting phase of my weightlifting diet.  I'm eating healthily but at about 500 kcal per day less than my resting metabolic rate (2500 kcal down from 3000 kcal).<p>It's not so much the hunger I have problems with but the <i>tiredness</i>.  I can still concentrate well on my work, but social situations seem to be a lot harder!  I guess I feel a bit more grumpy than usual.