Ankle dorsiflexion restriction is an important issue that can be easily missed or ignored in training. If not addressed, it can have a negative impact on sports performance and injury risk.  From a weight room point of view where this can have the biggest impact is with your squat depth and mechanics.   On the left we see that the knee is able to pass the toe, resulting in a more upright torso and improved squat depth.  While the right side is not wrong, it is more of a “hingey squat” and will lead to greater amounts of low back sheering and possible lower back pain. Picture credit:https://www.t-nation.com/training/tip-squat-without-hip-pain A common solution that I see is to raise the heels using plates.  This helps bypass the needs for greater amounts of dorsiflexion at the ankle joint and usually results in instantly improved technique and greater depth.  I love this option but it does not mean we should not work on improving the restriction at the ankle, especially with athletes. It serves as a crutch, and how wants to be on crutches their whole life? From a sports performance point of view, limited ankle mobility can reduce power production in athletic movements such as sprinting and jumping.  To get into optimal positions for acceleration (first phase in sprinting), an athlete needs to be able to get into greater degrees of positive shin angle. This is very challenging if you don’t have the required ankle mobility.  The image on the L shows the shin moving forwards the foot. One the R there is less movement of the shin towards the foot. Picture credit:http://miguelaragoncillo.com/2016/01/20/4-methods-to-improving-speed-qualities/ The ankle joint can also act like a spring, helping the body to be propelled through space, such as a jump. The more you coil spring, the more force it is going...