I am on a diet getting ready for a show in August, I have done many shows in the last 8 years. This year,I have been cycling my carbs 3 low 1 high etc. The strange thing is that on my high carb days, I feel horrible,bad lethargy . On my low carb days I feel terrific, good energy levels, great pumps at the gym , I am doing good in terms of getting into top shape, but just wondering since I have dieted many times and never experienced this. Any thoughts?