Every time I try and push a little harder during my workouts my knees give me shit. This wouldn't be as much of a problem if I wasn't young and didn't like being active, but I just hit 20 and I really like getting physical.
I'm not really looking for a diagnosis (I should probably see a doctor for that), but I would like some advice on how to temper the pain and push myself without making it worse.
Just so we're clear, when I say push harder, I don't mean anything insane. My baseline for years has been four days of lifting a week, and six days of not-that-intense cardio. Lifting has never given me issues, but whenever I crank up the cardio, my knees give out.