These employees managed to keep up this routine for the first three years at the banks, but starting in the fourth year, some saw their performance decline, particularly when it came to creative thinking.
"Not everyone can keep up with oral hydration so it is pretty routine to go to hospital and have a drip and wait for the thing to pass and keep yourself hydrated, " said Dr. Christopher Hawkey of the University of Nottingham's faculty of medicine and health sciences.