The Air Force veteran from Ackerman, Mississippi, joined the gym a year ago along with his second wife, Mary --- Black's first wife died after 48 years of marriage, Military Times reported.
It was tough for Black at first, AL.com reported. He was only able to walk for 10 minutes on a treadmill.
“I realized I was in bad shape," Black told the website. “I could not do simple tasks anymore. That’s what motivated me to do it.”
Now, Black can walk for 30 minutes, does leg presses and works out on upper-body machines, AL.com reported.
"I've been a blessed person," Black told AL.com. "I'm in good health. I thank the Lord for that. I still think humor in life is good."
Seaman said she believed Black can inspire other members of the fitness center.
"If he can do it, why can't we?'" Seaman told AL.com. "Fitness isn't about age. It's about healthy living."