If your feet turn out too much, you have excessive external rotation, not just from your ankle, but also from your knees and your hips.
Besides walking like a duck (this muscle imbalance is also called duck feet), it can also lead to injuries all the way up your kinetic chain, such as hip and back injuries, because your feet are at the bottom of your kinetic chain.
The best flexibility exercises for people whose feet turn out too much are myofascial release and stretches for:
- Biceps Femoris
- IT band/TFL
There are also certain resistance exercises that can help.