10 years ago my coach in HS always told me that when you open up your stride, you spend more time in the air and is wasted energy. Instead, you should quicken up your tempo.
As a HS coach now, I still hear other coaches yelling to their kids at the end of the race "OPEN UP YOUR STRIDE!!" Having Jack Daniels as a coach for ONE year at Cortland, I became fixated on the 180 foot steps a minute which is what the average elite runner takes.
Are these other coaches wrong about opening up your stride? Is it a combination of stride length and rate? What should I be telling my kids at the final half mile of the race?