Most small children love running. They need little encouragement to do so. Primary, and prep, school playgrounds are full of the constant buzz of physical activity. PE lessons featuring running and athletic activities are enthusiastically pursued.
Fast forward ten years. The great majority of adolescents are reluctant runners. House Cross Country events rarely present a school at its best. Lessons with a substantial running component quickly categorise themselves into the compliant athletes, the reluctant runners and the early walkers.
And yet another ten years further on, many of the same people have returned to running. Park Run, Race...