Traditional arts also have a lot of conditioning exercises for building endurance such as:Originally Posted by Lint
* jabbing palms and fingers at a gravel-filled bag (known as Iron Palm or Iron Hand)
* bumping limbs against teach other (known as "knocking")
* gradual striking of parts of the body
Here are some videos showing conditioning exercises to harden parts of the body:
http://www.youtube.com/watch?v=8fKSoB2GByM
http://www.youtube.com/watch?v=poN-ExZRQxw
http://www.youtube.com/watch?v=im9NzBciths