Wow Davide! I'm glad you're enjoying the trip but please stay hydrated and take care of yourself! I do Crossfit and sometimes when it's 100+ (there's no A/C in the box) I feel my body start shutting down like that, if there's one thing I've learned at my advanced age it's LISTEN to what your body is saying Better to stop and take a break than risk heat stroke or injury!
Better to stop and take a break than risk heat stroke or injury!