Frog

of course silly, The best mma fighters are always doing boxing training.
Small example: If anybody knows martial arts history with boxing would know that Bruce Lee when he developed (Jeet Kune Do which is the first mma) He took boxing forms from Muhammad Ali and Foot work,Not only that mma is famous for its mui tai boxing Name me some mui tai boxers or people in mma that train in mui tai, Its actually a essential art (Boxing) to actually learn.
You will get a good reaction speed when you spar as Well.I put mui tai in as example too because its an art that has been around hundereds of years and is one of the most lethal MArts out there its basically boxing with kicks which if you turn on the tv and watched a mma fight you will see majority of fights standing and fighters exchanging punches.

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Anthony Franklin