Tipton recommends five three- to five-minute immersions -- either one a day or stretched out over two to three days.

CNN: Are polar bear plunges good for you?

"I'm in no position to say whether it's one day or two days or three days, but it is a very short period of time, " he said.

CNN: Kosovo

The NHS Plan promises that by December 2004 all patients should be seen by a GP within two working days or by a primary care professional in one day.

BBC: NEWS | Health | More NHS walk-in centres unveiled