I've recently started noticing my knees feeling a little bit different lately. I wouldn't say that they hurt, but when I'm at work and I'm squatting down, and then I stand back up, it's kind of a strain and I can definitely feel it. I'm not sure if it's because lately I"ve been doing heavier squats at the gym, I know the difference between pain and soreness, and this is neither. It just seems like it takes a little bit more effort to stand up now (I'm 20). And I don't want to continue doing heavy squats if it's gonna make it worse, and I'd rather not see a doctor. Just looking to get some opinions from people in here and hear from the people who suffer from bad knees, cause I don't want to be limping by the time I'm 30.