Exercises you should definitely avoid if you have knocked knees: Running. Aerobics.

What are the disadvantages of knock knees?

Knock knees don't usually cause any other problems, although a few severe cases may cause knee pain, a limp or difficulty walking. Knock knees that don't improve on their own can also place your knees under extra pressure, which may increase your risk of developing arthritis.

Do athletes have knock knees?

One particular event common to youngsters of both genders, and frequently females of any age, is referred to as a “valgus knee” — or a “knock knee.” This condition is fairly easy to spot in younger athletes, especially as they perform squatting movements in which the knees begin moving toward each other at the midline ...