With sprinting there is less control of things like stride length and cadence do to forces being applied and distance traveled. You can't really apply things like a 180 cadence to something that lasts 100 meters and only 10-15 seconds. The keys to sprinting form are really more about being a power position with your frame. The torso is more upright with a slight lean forward. The knees raise higher, depending on the natural mechanics of an athlete I've seen the knee drive go as high as hip level. The arms are typically at a 90 degree angle and the hands drive up and in towards the head (they do not cross the body). Everything else is pretty much dictated by the speed at which you are travelling. One of the cool things about sprinting is that you can't really mess with it the way you can distance running. You can't really over stride because you'll jar yourself so much that teeth will fall out (maybe not literally) and things like cadence and a lot of the other little nit picky form cues go out the window because you're moving so fast and producing so much force.