This is something ive noticed for many years now. After a particularly stressful workout where gains could be achieved the next few days ill come down with flu like symptoms like runny nose, hot/cold temps and sometimes stomache pain. Its really annoying because i feel like shit and just want to rest. Ive noticed often the next day i need to wear tons of clothes to keep warm and battle it off as well. I though it was just me and another thing no one would believe so i googled it and found heaps of people had it. Flu-like symptoms after exercise - Exercise & Fitness - MedHelp Any of you guys had experience with this and have any ideas? Cheers.