Common sense, but if you're sitting for long hours trading at your desk, you might want to check this out. As a home trader this is easy to deal with. Just do some simple exercises near your desk (squats, push ups, etc.) every hour, or put a treadmill or bike in your office. http://www.comcast.net/articles/news-general/20100120/EU.MED.Dangers.of.Sitting/