From the Department of Things We Already Knew: A new report from the NYC Department of Health shows that people who regularly walk or bike at least 10 blocks feel healthier than those who don't, no matter the income level.But one thing that's interesting here are the significant effects of walking and biking on mental health. Have a look:Humans have been finely tuned over eons of evolution to move our limbs a lot to get around (as opposed to driving) and exercise in general has documented psychological benefits so it shouldn't be surprising that walking and biking are good for your mind.But this is a 40 percent increase in mental distress for people who don't walk or bike. These mental benefits are significant, and they're often overlooked in our discussions about transportation.