I think there is a difference between running short bouts of Max speed sprinting versus running long periods at a lower effort. It is the difference between zon

I think there is a difference between running short bouts of Max speed sprinting versus running long periods at a lower effort. It is the difference between zone 2 and zone 4/5 running, taxing different systems (aerobic vs anaerobic). I am not saying there is a need for speed, power, agility training as well, but I think it is achieving different things than long, slower runs.