The Core Sensor is a wearable device used by some of today's top runners and cyclists that tracks your body's core temperature while you work out, helping you to improve your performance in hot ...

The CORE sensor is the first and only wearable that gives you continuous, accurate core body temperature monitoring so you can train and perform at your best. Continuous, accurate core body ...

The next best upgrade of 2025 belongs to the Pixel Watch 4. You can read my review here, where I found the upgrades to be a mixed bag. (Dual band GPS? Great! Brighter screen? Eh, not really.) But the ...