VIDEO | Diego Sanchez strengthening jaw muscles ahead of

VIDEO | Diego Sanchez strengthening jaw muscles ahead of

Ahead of UFC veteran [Diego Sanchez’s UFC Fight Night 108 scrap with Al Iaquinta](https://www.bjpenn…

Details are scarce regarding the video at the present time, however the device appears to be used to strengthen the jaw muscles as Sanchez moves his chin in and out against the resistance of the band wrapped around the back of his neck.

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