I'm a runner too, but I found out that it is not the best activity to stop thinking about a topic. My mind keeps wandering around, unless I run so fast that I'm

I'm a runner too, but I found out that it is not the best activity to stop thinking about a topic. My mind keeps wandering around, unless I run so fast that I'm totally exhausted for the rest of the day. As I recently discovered that activities which require your undivided attention work better for me. My meditation is motorcycling and downhill biking :)