I'm not a fitness freak but have got into strength training over the past 5 years. Going through stress at work at the moment but the only time it really gets to me is when i havent exercised. I can manage one day off, but by the second it's like chemically I'm just SO SAD. It's as if the good chemicals linger for 24 hours and then I'm just totally in the doldrums, regardless of where I am in menstrual cycle. Anyone else have to exercise to keep great sadness at bay?