Joining in here because I’m interested too. I’m still fairly new to these events but hoping to get a place at LEL next year. Obviously not racing, but because I’m worried about cumulative lack of sleep, I really want to be as fast as I can be on the bike so I get enough hours sleep in. I found a lot of useful information about fatigue resistance in the sweet spot and threshold progression threads. That said, I’m just following a MV century training plan, currently on polarised base + weekly club rides (4-5h) and occasional day-long rides. I’d be very interested to hear about nutrition strategies from others. I’ve done a 650 km Audax on masses of drink mix and haribos (as well as real food at controls) but my teeth actually hurt from all the sugar at the end. Sweet Spot Progression