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Inside Usyk's training camp: How he's using a special mouth guard and breath-holding for Dubois

Despite being 38 years old Oleksandr Usyk is still an unstoppable force in boxing Mail Sport went into Usyk's camp to see exactly how he's holding off Father Time WATCH: Welcome To My Gym with Usyk ...
Yahoo! Sports

Smart mouth guards could be the new concussion preventer

Rugby players practice on a field. Smart mouth guards can help protect sport players from serious injuries. Franco van den Berg practices a tackle as the Utah Warriors rugby team practices at Zions ...