I used to do weight training. I had a trainer so he always took me to the weight room filled with primarily men. I had the worst mood swings at that time. I thought perhaps that lifting weights might be raising my testosterone which in turn was making me hostile. When I stopped working out with the trainer I moved my weight training to the mornings when there were a few women but almost no one else. My mood was fine then. I then discovered soon after, that I was hostile at times when I was on the treadmill too. So since it couldn't be the weight training (especially since I don't do that anymore) I had to think what else the common denominator could be. That's when I discovered it was the men surrounding me. I tested out my theory a few more times and it was true. Male sweat makes me angry. It's the weirdest thing. I thought I was crazy at first but then I looked it up and it turned out some male pheromones incite anger in other men. I figure I must just react like a man. I'm happy I figured it out. It's quite the hassle to have working out make you so angry all the time. Fortunately I plan to stick to yoga for the time being and there are almost no men in yoga.