>>2051562Common beginner mistake: not eating a shit ton continuously. When you grind all day you need to eat 2-3x the food of a normal day. If you get hungry on a bike, it's over. I eat nut mix while riding since it does not melt in the sun and is high caloric. In the breaks its usually a coke + juice + bread roll + chocolate bar or whatever high carb shit I can find.
During the ride I highly recommend to sip on carb electrolyte drink made from powder. It prevents cramps and gives you power. I go through at least 1.5l of this stuff on a riding day.
Mechanically make sure you have light enough gears on the bike. Going uphill fully packed after 100k in your legs you need something like 1:1 or better 1:0.9 gearing. Keep cadence high at at least 80 rpm to prevent excessive fatigue. Spin to win.
Kudos for attemtping this while having no idea what you are doing.