Several years ago, I had a knee injury.
Couldn't run for years. That's actually why my biking began - recommended as physical therapy, and then became the only exercise I could really keep up without problems.
I managed to start running again freshman year of college, and finally got to the point where the knee wasn't too bad.
Then the concussion happened, and I was back to not running.
As I mentioned, I've been trying to get back into it here in Edinburgh.
And I've clearly cleared a hurdle, in terms of encouraging consistent running...
Because my knee now hurts if I *don't* run.
Ha. A built-in mechanism for discouraging sleep-ins.
Look at that. Useful!