dean karnazes

Step It Up with Dean Karnazes

Ultramarathon man Dean Karnazes knows the value of 10,000 daily steps. Join him, the Surgeon General, and communities across the country, and take your step count and fitness to a whole new level.

How Dean Karnazes Uses Heart Rate Data While Training

Ultramarathoner Dean Karnazes shares some of his favorite recipes

PurePulse Heart Rate is a new technology at Fitbit that we’re really proud of. Included in  ChargeHR, Charge 2, Alta HR, Blaze and Surge, it offers continuous, automatic, wrist-based heart rate and simplified heart rate zones. Tracking your heart rate allows you to accurately track your calorie burn, maintain workout intensity, maximize...