Are there any rules on "hydrating properly"? My son has been inundated all summer with the phrases hydrate before, hydrate during, hydrate after, still better be hydrating....there have been a few kids this year that looked a bit wobbly on the baseball and the football fields who obviously didn't do this enough and one in football was hospitalized for OVER hydrating....any clear rules on this? (I'm feeling a little bit like Goldilocks here)