Watch Biggest Loser Alum Bob Harper Train With 80-Year-Old Grandfather Of CrossFit

Playing Watch Biggest Loser Alum Bob Harper Train With 80-Year-Old Grandfather Of CrossFit

Watch Biggest Loser Alum Bob Harper Train With 80-Year-Old Grandfather Of CrossFit

After overcoming a prostate cancer diagnosis in 2008, Jacinto Bonilla became a competitive CrossFit athlete — and he's still going strong at 80 years old. 

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