I am a 46 year old female. I am an avid long distance runner ( 3:49:12 marathon time). I lift weights 3 times per week. Became interested in the primal diet about 6 months ago. I was diagnosed with psoriatic arthritis and had found information suggesting that the primal diet might help. I tried it and felt much better for a few weeks although my endurance when running suffered! Then the craving of all cravings hit! I began craving carbs like I have never in my life and found myself eating as many as I could get! My weight soared 7 lbs over night! Help! What causes this, and what do I do to prevent it from happening again. This has happened a couple times so far. I appreciate any guidance. Would like to continue eating primal but can't keep having this happen.