The experience of warm water on one's skin helps with endorphine
release, and being able to submerge in a tub can help take the pressure off of some of the lower extremities.
This one is hard to explain to non-runners, but is basically an endorphine
rush which kicks in after a certain amount of exercise.
It can also tone up the face and stomach as well as conferring the same endorphine
rush that exercise, sex and chocolate bring.
Also, when people are relaxed, they have higher levels of the hormone endorphine
, which aids conception.
Quad biking and off-road driving provide for the endorphine
hungry, as an instructor takes you over a course of seemingly impossible terrain in a Land-Rover, with the truly brave allowed a shot in the driver's seat.