“Deep, controlled squats not only are NOT ”bad for the knees“, they are, in fact, good for the knees. Properly performed, they evenly and proportionately strengthen all muscles which stabilize and control the knee (in addition to strengthening the muscles of the hip and posterior chain, upper back, shoulder girdle etc).”
“1) In partial squats, the hamstrings aren't activated, which means the patellar tendon takes up all the strain/stress/pull during squats. As a result, fatigue and damage to the tendon can accumulate because tendons recover MUCH slower than muscles. Any type of action involving knee bend can then cause further stress and strain during daily activity. This is asking for trouble. If the hamstring is strong, it drastically reduces the amount of stress on the patellar tendon. Full squats make the hamstrings strong. Partial squats allow the hamstrings to become weak. Weak hamstrings are bad Bad BAD.”
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