Apologies for another sports related link, but this one seem apt:

"Don't 'Throw Until You Die'"
http://www.nytimes.com/1995/07/15/opinion/don-t-throw-until-you-die.html

'In the last year, Nomo began complaining of shoulder pain. But his request to ease up was rejected gruffly by his manager, a onetime pitching star out of the warrior tradition whose philosophy has been described by Robert Whiting, the pre-eminent American expert on Japanese baseball, as "Throw until you die." '

More isn't always better. It's just more.