Exercise, and in particular 30 minutes or more, every day, has been successful as one of the best forms of preventive medicine out there. It's highly effective against progression in depression, anxiety, knee arthritis, frank diabetes, and many other illnesses. One of the best videos that illustrates the benefits is 23 1/2 by Dr. Mike Evans: https://www.youtube.com/watch?v=aUaInS6HIGo

We based our app on the notion of moving at least 30 minutes every day. We've had very positive feedback from people that cope with depression and/or anxiety. Would love your feedback: http://human.co