The faster you walk, the faster you burn calories. If you’re already a walker, add some action with speedwalking. In the middle of your regular walk, walk as fast as you can for a minute or so. When you get comfortable with that, add another minute or two. Bend your elbows and pump your arms to add momentum. Be sure not to strain yourself. You’ll know you are if your legs turn into knots. If that happens, slow down!
In the long run, try to cover a mile as fast as you can. Making a mile in 15 minutes is great, and twice that is an ideal workout. Remember, when you’re speedwalking, do a slower walk for 10 or 15 minutes as a warm-up and again afterward as a cool-down.