35. Power Walking
Once you're good with walking for long distances, start power walking!
This is, of course, a little faster, with more arm movement, and you can throw in a twisting motion as well.
It's not quite walking and not quite running, so it's a great medium as you work your way up to something more intense.
All you need to do is make sure that your rhythm causes your heart rate to increase.
That's essential when it comes to burning calories, losing weight, and losing a muffin top in particular.