Knee pain from squats

[sunshineboy]

After getting ss a month ago my squat has increased from 315x1 to 385x5x3 but my knees have started hurting. I backed the weight down to 320 but the knees still feel funny and I can hear them crack and pop when squating down until i'm warmed up. Is this normal? The pain is worse hours after i've squated.I work on my feet 10 hours a day and don't want to hurt my knees since it would hinder my job.
I lift in a small town gym where i'm the only one who uses the free weights so I have no one to ask for advice.


Thanks in advance for any and all advice.

Sunshineboy

[Mark Rippetoe]

Have you read the book?

[JasonM]

315x1 to 385x5x3 in one month? My guess is that you're depth sucks. The knee pain is probably caused by knee sheer from not squating deep enough to get a full hamstring stretch. Check your depth.

[iMagnusX]

Yeah, that and NOT WARMING UP.