Walking's good too. In 2012 I helped shoot a feature length documentary about running, actor Sean Astin volunteered to narrate the film gratis because he believes in running. One of the people interviewed in the film is a guy who, at age 47, was over 300 pounds and had never run before - he just woke up one day and decided he was going to run the Boston Marathon. 10 months later he finished the Boston Marathon. He stuck with running and now is very fit, he does these "run 7 marathons in 7 continents in 7 days" challenges, etc. I think the interesting thing is it's an example making a dramatic life change is possible.
I will look into it. I jog most days. So few joggers here compared to the USA. I enjoy jogging by the gorditos locals and turistas drinking soda on the beach here in Juan Dolio. I feel when they watch me it (challenges) them..probably not.