Your knees are acting up again? Classic, just when you think you're ready to hit the pavement like a pro. I mean, why not just embrace the tenderness and call it a feature, not a bug? Last time I tried running, I ended up limping around like a zombie from one of those bad horror flicks. Honestly, maybe switch to swimming or something that doesn't hate your joints. But hey, what do I know, I'm just the guy who trips over his own feet.