Yes. Once you get to the borderline between walking and running it actually becomes more mechanically inefficient to keep walking. It is surprisingly strenuous as a workout and you can really get your heart rate up.
For people who actually need to lose weight walking is the best way to do it. Running is likely to bring your heart rate up so that you burn protein instead of fat. For people who are unfit walking should get your heart rate up just high enough to burn fat. People should only start running after jogging becomes too easy and only start jogging if walking is too easy.
Yes. Once you get to the borderline between walking and running it actually becomes more mechanically inefficient to keep walking. It is surprisingly strenuous as a workout and you can really get your heart rate up.
For people who actually need to lose weight walking is the best way to do it. Running is likely to bring your heart rate up so that you burn protein instead of fat. For people who are unfit walking should get your heart rate up just high enough to burn fat. People should only start running after jogging becomes too easy and only start jogging if walking is too easy.