In reply to Robert Durran:
I like the idea of this. I've been trying to deal with tendonosis for years and my failiure to deal with it stems mainly from my low boredom threshold for doing any kind of repetitive training that isn't actually climbing (weights,yoga,pilates etc) I just can't keep at a recovery regime long enough to cope with the length of time it takes for tendons to get strong (and I'm sure i'm not alone in this).
However I'd happily start downclimbing every route I do at the wall this winter and it would seem to me that reversing moves in a slow controlled way is excentric training. The stamina gains and increased downclimbing skill would just be a bonus.
Just to clarify (for my-self and others, jump in and correct me if i'm wrong.)
The 3 keys to recovery are:
1) increasing the flexability of the flexor muscle.
2) building up the opposing extensor muscle to bring it more in balance with the flexor.
3) building up the tendon strength in balance with flexor muscle through excentric training.
Excentric training helps as normally the tendon receives less blood-flow than the associated muscle and therefore insreases in strength slower. The muscle gets too strong for the tendon (particularly with sudden increases in training) and causes it stress which starts as inflamation (tendonitis) and over time will turn into damage to the tendon(tendonosis).
When a muscle is worked excentricly it is only at around 40% of its capacity whereas the tendon is still at 100%, giving it a chance to catch up in the strength race.
Is that right?