This is me in the process of cross country skiing, as you can see I have excellent posture and perfect technique all the time. What you can't see is the sweat, snot and tears that went into such perfection on skiis. Being truthful, this was pretty much the hardest thing I've ever done in my life physically. It resembled an odd form of torture involving coordination and muscle power. Sadly, not one of those qualities is present in my body.