Once you set your current fitness level and training paces, you’ll know it’s time to level up by paying attention to these three signs, according to Karp: You feel completely in control of your ...

I chatted with Fitbit's new Gemini-powered virtual fitness trainer for nearly 20 minutes, and it wasn't nearly as weird as I ...

I ran the New York City Marathon wearing seven fitness trackers, and I don't even regret it. On my journey, two pieces of ...