One comment: most recreational runners don't move most of the time at a 6:40/mile pace. That's the pace you need for a 2:45 marathon. I suspect that 3.3/s or 3

One comment: most recreational runners don't move most of the time at a 6:40/mile pace. That's the pace you need for a 2:45 marathon. I suspect that 3.3/s or 3 meters/s (eight or nine minute miles) is closer to what most people are running.