House 10 sets of Hacks ouch.Do you think that wittling your weight down had anything to do with it ?If so, how fast has your weight drop been since you started dieting?
I hope it is not too severe an injury bro.

70w30, the right knee has been bad for a while but i have been getting by with it.

the workout is my partners brainchild. he always follows mine so i follow his once in a bluemoon. was not suppose to do legs till today but couldnt make it so we did them thursday.

my weight is not dropping that fast not fast enough for me anyway. so that had nothing to do with it.

when your getting pain back off!!!! i should know that by now. sometimes you get stupid and you pay the price

Believe me I know brother ,I hope all is well after a few days rest.

leg extension put alot of stress on your knees, special 10*10 reps of that.
You over did it big time, also when you go down too far you place alot of stress on your knee. Specially on hack squats

After knee reconstructive surgery, leg extension were out of the question for 9 months, according to my orthopedic surgeon. To this day, hacks are the only thing that really kills me. Sometimes i wonder when doing heavy squats, when your at the point were your struggling with the weight to budge up, if my knee will hold up or not. Hasnt blown out yet, but there are times when it "slips" to either side, and it hurts for a few days.

House,
i know it may be blasphemy, but i would avoid squats and hacks for a couple of weeks. I would do a lot of leg presses, these are easiest on my knees, and if you dont lock out, they keep the stress on the muscle itself, not really the joint. If you do leg extension go high reps, and never past failure. Although they may seem like they put a lot of stress on the knee, sissy squats dont affect me much at all, more stress is on the kneecap, than the ligaments. Try some weighted sissy squats.