1 doctor weighed in:

What amount can insoles help to correct inwardly bent knees (knock knees)?

1 doctor weighed in
Dr. Robert Lowe
Pediatric Rheumatology

In brief: Depends

If your knock knees are being caused to some degree by flat feet, then shoe arch support insoles may be helpful.
Many people have flat feet and it doesn't bother them at all.Others have flat feet that cause their ankles to roll inwards (over pronation) and result in foot, ankle, knee, hip, or back pain.Consider seeing physical therapist.See http://www.Nlm.Nih.Gov/medlineplus/ency/article/001262.Htm.

In brief: Depends

If your knock knees are being caused to some degree by flat feet, then shoe arch support insoles may be helpful.
Many people have flat feet and it doesn't bother them at all.Others have flat feet that cause their ankles to roll inwards (over pronation) and result in foot, ankle, knee, hip, or back pain.Consider seeing physical therapist.See http://www.Nlm.Nih.Gov/medlineplus/ency/article/001262.Htm.
Thank