We are now more than 2 years post-surgery, and he is still doing very well. He runs on mountain trails daily with The Runner. He occasionally limps but it rarely lasts long. A big part of how we help our Black Dog to keep running happily is by doing daily exercises with him.
At this point, R is about 10.5 years old so he's starting to deal with age-related issues along with his elbow issues. Labs tend to lose hind end strength as they get older, and I've seen some very minor signs of that process starting for R. Consequently, we've added in a few exercises to strengthen his hind end, like sit-stand on a destabilizing squishy surface.
I thought that you might enjoy seeing his current exercise routine. I made a video with about half of his daily exercises on it. I'll make another video soon with the other half. Enjoy watching our crazy boy! You can watch it here or at Youtube.