The Core 2 sensor gives you three numbers whenever you wear it: Your core temperature is the temperature inside your body, specifically inside your torso (your core). Some studies test this with a ...

Core promises to transform winter workouts with its body heat temperature sensor - here’s my take on using this device as a professional athlete The Standard's journalism is supported by our readers.

We may earn a commission from links on this page. Heat training hasn’t made hot weather running fun, but it has made those sweltering runs possible. This time last year, I did no more than five-mile ...