http://www.youtube.com/watch?v=Mg6-Fq-dSJA
When i was squatting like a b1tch something like this ^^ LOL
My knees were constantly killing me.... Im 23 yrs old but through lots of manual labor and sports My knees are pretty screwed.. However , once i started squatting
correctly i actually felt a big relief [ in general ] as far as my knees...
I put on aprox 50 lbs, in about 21 months, Squatting usually 2x a week, and deadlifting weekly, While gaining very little BF... [naturally] of course with a great diet and dedication..... Although that was then this is now ^_^
Certaintly without those beautiful compound movements i would of never gained so much mass and strength....