Frequently stopping feeling light headed. My pulse over 130 only walking at snail pace. It was very cold too. We stopped at 5350m, 250m from the top, still more than an hour to climb. We both had mild headache, the first sign of altitude sickness so we took lots of photo's and decided to descend. It took us barely 15mins to descend! I'm less worried about the race altitude which is only up to 3500m but i know it will be tough. I still have headache 5 hours and lots of painkillers later. Admin day tomorrow. Race starts sunday.
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