I tore my ACL back in 2000. The injury compressed my meniscus, which the doctor kind of shaved off, like you might scrape off the peanut butter protuding from a sandwhich that got smushed. The problem with my meniscus is that it is now too thin, and at the time, there was nothing that could be done about that. I've heard they are experimenting with a synthetic meniscus, but haven't found any info.

Biking has been a lot easier on my knees than running. The meniscus is an impact sponge. There is little impact stress on the knee while biking due to the continuous stroke. There have been times after too much soccer where I can barely walk, but I can still ride.

Do whatever therapy your doc prescribes. Mine started me off pedaling backward on the bike and walking backward on a treadmill.