It was known well in advance that racing in Townsville, Australia would be a hot race. Being too hot is the enemy when it comes to performance. Ultimately, those who handled the heat best would have the greatest chance of success. For a couple years, I’ve been using a core sensor to measure my core temperature. To date I’ve not used the data for any specific training, however I find it interesting how my body responds as my core temperature changes. I’ve observed that when my core temperature exceeds 38.5, my rate of perceived effort (RPE) to perform also starts to dramatically increase. Above 39.3-39.5 and my desire to cool…