I m a runner. I ve never had issues with knees. Two weeks ago, I ran 8 miles (which is less than my normal), and was fine, until I rested. I limp when I first stand up - about 5 steps, and then I can walk normally. I rested it for 3-weeks, besides my normal work schedule and I iced it. I went for a 3-mile run today. I m limping again about 5-steps and then I can walk normally.