Interesting video here of one of the San people running down a Kudu which collapses from exhaustion after an 8 hour chase: https://www.youtube.com/watch?v=826HMLoiE_o. Hard to compare this to Sorokin because the hunter is running in veld, not on a road, and has far less access to refueling points. Also, if he fails to track the prey down on day one, he would probably have a go again on day two, maybe even day three. Interesting claims too, that as an upright runner which sweats from glands all over his body, and as a creature capable of carrying water, man may have had persistence advantages over creatures with less ability to cool themselves and which run on four legs - a less energy efficient mode of running according to Attenborough.