Walking really is a winning exercise on every front, and new research shows that by simply walking faster, you can reap extra benefits. We’re not talking just a bigger calorie burn (350 compared with 250 per hour) and improved fitness. Faster walkers have lower rates of death than slower walkers from causes including heart disease and dementia, according to a review of the National Walkers' Health Study. If you reach a pace that’s almost running, you’ll burn more calories than running at that exact speed. A brisk walk also reduces the risk of heart disease more effectively than a run that burns the same number of calories.