I personally have to work out in the mornings or I would never do it. I have had lightheadedness and became sick to my stomach at times. I am no pro but through trial and error this has worked for me. I consume 1/2 of a zone perfect bar every morning 30 minutes before I work out (3g of fat, 8g of protein, 10g of carbs total of 100 cal.) about 8:00-8:30. I keep them in night stand and break one in half when I get up and drink about 12-24 oz of water. When I meet up with Cathe in my basement and she says power 15 we are on, no time for lightheadedness or tummy problems and this has worked for me. Also since I have been doing this I have noticed that I have alot more energy and strength for jumps, jacks, weights and what ever else Cathe has to throw at me. You don't have to use Zone perfect, use something you like but stay close to that ratio. (read about this ratio in an article) This is the only time I consume a zone perfect bar. I choose this bar because of the ratio and they taste great and I hate powdered protein drinks....YUK!
Hope this will help.
~Theresa~