So in no way is this a plug to buy this book but I think it goes handily with what this group is all about.
he Breakout Principle: How to Activate the Natural Trigger That Maximizes Creativity, Athletic Performance, Productivity and Personal Well-Being by Herbert Benson is something I read years ago and speaks directyl to coders who are faced daily with productivity and complex solution oriented tasks.
In short it says get up and do something else for a minimum of 30 minutes...Hmmmm. What else is better than a jog or some wrist exercises to strengthen tendons to avoid carpel tunnel!
the book goes way in depth about how the mind works and gives some case studies on what heppens to people when on a long walk etc...so hard printed evidence to creating a healthy lifestyle and breaking through complicated tasks does exist.