>> Tosh...yeah my first 200km event (40 hour cut-off) and will be my last...its a bucket list type of thing...run plenty of smaller events ran a few marathon length obstacle tough mudder type things wearing a fully serviceable gasmask to highlight PTSD within the Mil and Veteran community.... Wow your lady wife is certainly the beast ! and hey 46 miles is no joke either ! crewing your wife ! .... thats a tough job and all runners tend to turn into monsters and meltdown along the way !
Dave.
200km is a huge jump up from a marathon. Not far off five marathons. I don't know if I'm teaching you to suck eggs, but fuelling will be your problem (it's often every ultra runners problem). After several hours your body may start rejecting food, particularly sweet stuff like gels. But everything becomes a problem to eat, even normal ultra foods like pizza. And if that happens, you may as well just get in your doss bag and have a sleep.
So after reading Primal Endurance, which advocates a low carb high fat approach, to become a fat-adapted runner, she finds this has given her a huge edge. The last race she ran was the Vale Coastal Ultra, about four weeks ago, again she came first lady and beat most of the blokes.
She didn't struggle with food or energy levels at all.
Our brains seem to like the low carb high fat approach too.
Anyway, I really recommend this book for both training and fuelling:
https://www.amazon.co.uk/Primal-Endurance-Chronic-Carbohydrate-Dependency-x/dp/1939563089Instead of just muddling along, trying to improve my fitness and endurance, I reckon I've got a pretty good grasp of it all now. Audio is probably better; Mark Sissons waffles.