My mare tore a tendon about 8 months ago; my vet did several "shock wave"
therapies on it and says it's fine to start riding now and eventually
conditioning again for endurance. He said it's important to bring them
back slowly (he's a middle aged race track vet who's seen more than his share of
leg injuries) for long term soundness. He said the shock wave therapy
breaks up the scar tissue and makes the healed tendon fibers stronger and less
likely to re-injure.