Once you have been eating according to the Zone for a month or so your body will adjust and be a lean, mean machine; very efficient .
Some of our Athletes and Crossfitters who Zone will add 2 block snacks before and after the workout. Education is the fastest way to success, so I recommend you purchase " Mastering the Zone " by Dr Barry Sears.
All his books can be found at this link : http://shop.zonediet.com/custom/pro...8463110fd5
and are very reasonably priced. http://www.zonediet.com/0/zonediet/...n-the-zone