The only time I ever feel productive is when I develop a full-on obsession to do something and improve at it. Other times it's the feeling of being part of a g

The only time I ever feel productive is when I develop a full-on obsession to do something and improve at it. Other times it's the feeling of being part of a greater force for the better. Then I start cruising and here I am. Cardiovascular exercise is one helluva drug but my experience tells me it's effects on behavior are pretty domain specific (although there is a lot of research on how it will enhance mental functions and executive brain functions). It clears my head like nothing else but the spillover into the other aspects of my life isn't that dramatic.