CORE Sensor For us ultramarathoners, pushing the limits of human endurance is, quite simply, what we do!!!  For those of us who are managing to cover the bases of our training and do the basics right, those marginal gains can make a significant difference. One such gain comes from heat acclimation—a process that has a long … Continue reading CORE Sensor Body Temperature Monitoring Device: The Science and Experience of Heat Acclimation for Ultramarathoners