Train Hurt: interesting article in NYTimes
This article brings up the idea of not simply resting an injured area, but training around it, or in the case of a few doctors' recommendations, train right through it.
Even without the extreme doctor's recommendations, the take-away message is that light activity can in fact REDUCE recovery time. That even for tendinitis, which involves inflammation, moderate use of the inflamed area will actually cause your body to release anti inflammatory... stuff. Steroids?
None of this is necessarily new, but it is interesting to see it in mainstream discussion, rather than simply on internet forums requiring that you "KEEP TRAINING, *****" when complaining of an injury.