Caffeine for ultrarunners

Only drank about just over half a litre of water. Had a full breakfast before I started including fruit rice and chicken. Had one sticky rice on the way up just for fun. Didn’t really need it. Ran fast and free on the way down. Love the Rincon trainers that I’m using by Hoka. It’s super light, your foot feels free inside and doesn’t slip too much to the front when descending.