I have briefly looked into the question of cold drinks during and after exercise. There seems to be evidence on both sides of the question, "Do cold drinks harm you during or after exercise?" Since this is an important medical question, one should always consult a physician in addition to researching.

On the "Yes" side of the question:

http://archfami.ama-assn.org/issues/...l/fbf9010.html

This webpage relates to cases of atrial fibrillation (extremely rapid heart rate) seemingly induced by ingesting cold food.

Also:

www.aanma.org/aaadesc.htm

This webpage relates to cold beverages triggering asthmatic attacks.

On the "No" side:

www.halcyon.com/gasman/fluids.htm
www.multisportsa.com/injuries/nutritio.htm

If you are concerned, consult your physician.

Thanks for the provoking posts.