Wearable Data upload

The accuracy of three wearable and 3 spot-check temperature devices was assessed at rest in temperate (25C) and hot (50C) ambient conditions as well as during exercise in the heat. Participants first rested for 30 minutes in a semi-supine position in temperate conditions, before entering an environmental chamber set at 50C, where they rested semi-supine for a further 60 minutes. This was followed by 20 minutes on a cycle ergometer at 1.6 W/kg.