The research was done and published in the Mayo Clinic Proceedings and says that faster walkers live longer regardless of body weight or obesity status.
Brisk walkers hit speeds of 3 mph or about 100 steps per minute. Slow walkers do about 1 mph or just 50 steps per minute.
The finds say in part;
The researchers, who studied 474,919 people, found that those with a fast walking pace had a longer life expectancy across all weight categories — from underweight to morbidly obese.
To put this into perspective, overweight people who walk slowly had a the lowest life expectancy, living on average 64.8 years for men and 72.4 years for women.
Also, slower walkers were twice as likely to have a heart-related death compared to fast walkers.