Walking is a great hobby for a number of reasons. Here's our top 10:

1. Walking burns mostly fat calories. Although walking doesn't burn as many calories as running, the calories it does burn are almost all fat. This is great news, especially for bodybuilders looking to hold on to muscle.
   
2. Walking is low-impact, meaning your joints won't come under as much pressure.
3. You can walk anywhere, for no cost and you don't need any expensive equipment.
   
4. You'll get to see some wonderful sights if you're willing to go further afield. 
5. It's easy to keep up as a hobby - if you can't find the energy to go for a walk then you should look at your diet.
6. Walking can be great for stress levels and your mood. Exercise releases endorphins, or "feel good" chemicals to the brain.