• Nobody Can Agree on What ‘Zone 2’ Cardio Is

    Nobody Can Agree on What ‘Zone 2’ Cardio Is

    This post is part of Find Your Fit Tech, Lifehacker’s fitness wearables buying guide. I’m asking the tough questions about whether wearables can really improve your health, how to find the right one for you, and how to make the most of the data wearables can offer. “Zone 2” is the term the fitness world…