I can definitely recommend this (although I certainly wasn't able to continue it beyond my 30th).
I wondered how long it would be practical to keep it up. Are there any fit 65yo ultramarathoners? I can imagine 65 for 65, definitely not 70 for 70.
James saw this and told me there was no way he was doing 39k with me for my 39th! (did do 38k at the rogaine though so guess I can count it as 38k for the last week of being 38)
Haha, weak! Good work though!