The BOSU Speed Skater exercise requires athletes to keep a positive shin angle while moving explosively in a lateral plane. (weckmethod.com)
If you take a close look at the lunge you will see the same hip / knee / shin angle in the lunge. (weckmethod.com)
For athletic performance, greater dorsiflexion allows a greater shin angle on exercises like sprinting, which can improve sprinting speed by improving leverage through the hip, knee, and ankle. (onnit.com)