I used to live in a beautiful valley in Wales. When I went jogging in the woods I finished off by jumping from a rock into a waterfall (it was in a wild place, nobody else about).

By first working up a sweat the CWI wasn't too shocking. But what a great feeling afterwards! It's like being high off the best possible drug. Good for your skin too.

Definitely a healthful thing to do if your heart is ok.