On: Can Exercise Keep You Young?

[electromagnetic]

I think the Romans largely managed it through building level roads to march on. Most pre-industrial armies were marching off-road. I would be saying walking 2 miles/hour on a tarmac road would be someone's maximum before causing damage. Offroad I'd be saying 1.5, maybe even 1 mile/hour depending on the terrain.

[jacques_chester → electromagnetic]

In the late republic they were sustaining this pace in hostile territory -- where the roads were basically dirt winding along ridgetops and riverbeds.