Do you really need 10,000 steps a day?

cardiogram Heart Health, Steps

We’re often told to walk 10,000 steps per day, but what is the science behind that? Why not 20,000? 5,000? Why step count, and not the type of exercise, intensity, or total minutes? With the advent of Apple Watch and Android Wear, millions of people now have heart rate sensors strapped to their wrist. To answer the questions above, we …