What ARE strides, exactly?
Strides are runs of 80 to 100 meters, fast but relaxed. You should accelerate gradually over the first three-quarters of the distance and then decelerate to the end. Use strides to practice good form and relaxed running. Strides work fast-twitch fibers in a non-stressful way. Complete recovery should occur between repetitions, usually 20 seconds is enough.
If you want to feel fast - faster than you have ever felt while running - try some strides in your bare feet across a grassy field. Man, they feel good.
Wow! These women must've just done some strides!