In a previous Comrades thread, Eric posts a way to run-walk ultras. Do you think there is an appropriate way to run ´em?
I have tried several times the patience-consuming run 5k, walk 2min or so, but I confess that I get sick of waiting next walk. So I am always prone to walk every uphill (even if very slight), jog flat sections and run properly downhills. Any more advice?