I use a recumbent stationary bike. When the weather is crummy or for time if I have something else going on. At this point I do 7-10 miles a day 5-6 days a week. Since the weather here hasn't really turned the corner yet the indoor riding is almost a must. I'm admittedly a fair weather rider. When its super windy and lower than 50 degrees I would just as soon stay in the basement and ride. But I do love it when I ride outside, obviously the rides are more enjoyable, and usually longer.