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Published 16:51 21 Nov 2015 GMT
Updated 18:23 21 Nov 2015 GMT

Aldo was asked about the protective vest at a media scrum in Rio this week and he explained it further.
"It's a shirt that quarterbacks use to protect their ribs," Aldo said. "I'm using it in training.
"You can hit me in my ribs now because I've got wood to protect me so I won't get hurt."
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