How to test for ankle flexibility?

This is a quick test to see if you are missing flexible ankles. You need at least 10 degrees of ankle dorsiflexion for walking properly. For squatting, running and other athletic activities you need more range of motion for optimal sports performance and injury free motion. Ankle exercises are important for injury prevention and essential for running. A lot of athletes and runners are missing adequate ankle flexibility which often results in compensatory changes up the chain with high risk of injury.