I tried to tell them to slow down & gradually their endurance will grow. As you know, even if the event is poorly organized (like Australia), the ability to cover long distances is already within us.
As almost always, good runners overestimate what they can do on a day to day basis. Dave Proctor had no real multiday running experience and his performance in a 6 day race was already an indicator since he started to fast too. In a pod cast interview he was already dreaming of running a new 6 day record. It always looks so easy on paper. 107 kms per day, how hard can it be? ;-)
Why do you think Dave cheated?
I tried to read most posts here but I still haven't seen any signs of that.