First, count your stride rate with a one foot count, so it's 100 to 110, not 200 to 220. Try counting that yourself, though, because that sounds pretty high. Your easy runs probably have you at about 84 or 85 and workouts or races up to 90 or so, maybe more, but I doubt up to 100. Also, it really depends what machine you're using. Most of them have really short strides, like 7 inches. The better ones have stride lengths of 17 inches or more and there are two with adjustable stride lengths all the way up to 24 inches. Your real stride length when you're out running, of course, is a lot longer than that but when you're out running, you have float time added into the stride length. On the elliptical it's purely the foot separation and 24 inches is about right for running. If you're on a machine with a really short stride length, either go somewhere else until you find one with at least 17 inches or get in the pool. The short stride length is really NOT good for you. To measure the length, move the pedals to their biggest separation and measure from the back of one pedal to the back of the other pedal.