How I improved my fitness performance by tracking this often-overlooked metric
Matthew Miller/ZDNETZDNET's key takeawaysThe Core body sensor, a wearable device that captures and records your internal body temperature without the need for any more invasive methods.Also: Best sports watchesHeart rate tracking has historically been the most common metric in performance tracking for runners, but over the last couple of years more eyes have been looking at running power. Most every new GPS sports watch and smartwatch now captures and calculates running power in attempt to normalize the uneven!-->>…