Insulin resistance means that your body can't use the insulin it produces, so your blood sugar perpetually remains high.  The reason you feel hungry is that your cells and organs are starving because the glucose they need to function is still in the bloodstream instead of where it needs to be.  People feel hungry and eat more, causing blood sugar to go even higher.  The problem is that extremely high blood sugar is actually toxic to nerves, causing blindness and peripheral neuropathy (numb feet) which ultimately leads to amputations because injuries aren't noticed or cared for. Exercise does two really neat things.  First, it increases the body's sensitivity to insulin.  Second, muscles can still pull sugar from the bloodstream even without insulin.  This is why diabetics are constantly being told to exercise to help cure their diabetes, but since they're fat lazy fucks, they'd rather die that get off their asses and put down their precious beetus.