It does not matter whether we are running on asphalt pavement, cement, dirt, grass, in mud, snow, uphill, downhill or running short distance sprints, medium distance 5- or 10K's, or long distance half-marathons, marathons, or ultramarathons. Any activity involving running, like triathlons and duathlons, CrossFit, Spartan Race and other obstacle course races, in addition to all (team) ball sports, and even running to our cars, requires us to running with proper running technique, so we can do those to our highest and best abilities, and without pain and injury.