Yes, I keep up with my basic stretching and muscle toning exercises
I work nights, sit at a desk, and don't sleep very well. I seldom get more than 3 - 4 hours a day. To offset the fatigue, I usually run three miles a few times a week. I'm also a student of Tai Kwon Do and Krav Maga, and I train 2 - 3 days a week time permitting. Daily training is a habit that I never lost when I left the Army. The TKD is primarily to retain my flexibility and prevent muscle atrophy. That, in turn, helps to keep me pain free. At 42, I don't compete anymore and surely wouldn't want to test my skills at my age.