I heard something on the radio that long-distance (e.g. marathon) runners' body temperature rises up to 41c. Is this true? Would that be dangerous? Wouldn't they become delerious?

Confused,
Wallonia.

(I may have to drop the idea of going fo the next Olympics!)

Are you also a long-distance runner ?
There are some good races troughout Belgium during spring and Summer, a good way of discovering nice spot and villages.

Marcel used to run for Ghana !

Get yer ears cleaned Diz - I had the runs in Ghana!