I'm 50, been athletic all my life, at the gym 5-7days/wk. (6ft, muscular, non smoker, non drinker) I recently got what I thought was the flu. Headaches, tired then I got a fever I took 2 days off from work and over the 10days I was sick I lost 32lbs (236 to 204) I'm back up to 210. Now I'm at work and my hands shake a little, my legs shake when going down the stairs, and my ankles are very swollen.. whats going on