Google wasn't kidding when they say this watch has ultra fast charging. Not much else has changed since the 3, though.

We found the best walking apps for everyone (regardless of your goals), from data lovers to guided-workout enthusiasts.

Ease into exercise with “Japanese walking,” a popular 30-minute interval training regimen that alternates bursts of speed with a walk at a normal pace.

Objective To perform a large-scale pairwise and network meta-analysis on the effects of all relevant exercise training modes on resting blood pressure to establish optimal antihypertensive exercise ...

Individuals ages 18-30 and age 60 and up are needed to participate in a study on the impact of memory tasks on measures of balance. Participants should be able to communicate easily in spoken English; ...