It seems like stamina drains way too fast when you are running (not sprinting). I would think a person (especially an above average person like our toons are suppose to be) would be able to run at that pace for +/-30 minutes nonstop.
I don't see why there is stamina drain at all on regular running. I understand stamina drain on sprinting and jumping, but regular running stamina drain just seems annoying to me.
Also, the drain is too severe on sprinting. I don't think anyone will use it much at all because of this. Maybe have it tick at the same rate but for half of what it does now each tick.