Exercise will increase your ability to cope with stress as well as bring circulation to your brain for better cognitive thinking. It improves melatonin for healthy sleep patterns and helps fight degenerative diseases in the spine.
This is so true. I think its part of what's great about being a 'runner.' It's not like being a trobone player, where you have to be pretty good to tell people you are one. If you go running today, you are a runner.