Mark was talking about having cold water which very slightly boosts your metabolism because the water has to be heated to body temp before it can be absorbed.
They want cold water w/ the protein because it will taste better, NOT because it will be absorbed faster if it is cold water.
Drinking cold water does feel better expecially after a workout because it brings down your core temp slightly while the heat from your body is absorbed into the water making it body temperature.
Water that is cold has less kinetic energy, meaning it will have less collisions with other molecules and is less active. It will absorb slower into cells because it has less kinetic energy until it heats up to body temp. Water that is at body temperature will have more kinetic energy, meaning more collisions with other molecules and it will diffuse across cell memebranes quicker than a colder substance.
The difference is slight but cold water is not absorbed quicker, it is less efficient and requires energy to heat up, that is why it boosts your metabolism slightly.
The coldness of the water is purely to make the drink taste better.
<message edited by RedJeep on Monday, July 14, 2008 9:02 PM>