I guess it's something we'll just have to wait a bit longer to hear more specifically. Often "running" will require stamina, but that quick jog that most games have you moving at doesn't require any extra endurance. The earlier quoted blog post, while old, specifically says walking across the hex was how they did the calculation, which has me hoping that on foot travel will not be as silly as most games have it looking where we all move at a brisk jogging pace at all times. It makes sense in combat to move faster with the stamina cost, of course. If so, sweatbands may be a popular commodity. :)