I try to exercise every day, or at least 5-6 days of the week. When the weather isn't quite nice enough for me to hike outside, (temperature above 50 with wind under 10 mph), then I work out inside. On the inside days, I ride my bike for 30 minutes or 7.5+ miles, I walk and run on the treadmill for 2 miles, which takes about 30 minutes, and I lift weights and do a few calisthenics. I try to do everything at a pace that I work up a sweat and hold it. I get bored easily, when exercising inside, so I keep piles of magazines nearby, to thumb through. I listen to my IPOD. It's not easy staying fit!