I feel like the best exercise plan is the exercise plan that you'll stick to and the one that you don't hate doing.
Walking one mile (~20 minutes) and running one mile (~10 minutes) actually burns a similar amount of calories; walking just takes longer. Running will build different muscles and will improve your high-intensity endurance.
I love walking too, so I walk. I walk a LOT, and I love it. This morning I woke up this morning and walked for two hours on the treadmill while watching the news.
I also want to build my other muscles, so I do 1 minute sprints at the beginning and end of my walking, and three times a week I do 5 minutes of a very high intensity workout video. I tell myself I can do anything for 5 minutes.
So, don't feel guilty. Do what works for you. If you aren't meeting your goals, try changing it up, but if you are, or you are just starting out, walking 1 mile is great.
| current weight: 165.0