Atlanta’s Dolvett Quince earlier this year was taping a piece for TBS using a trampoline at Sky Zone.

The trampoline won.

The “Biggest Loser” trainer cracked a heel bone and ligaments in one of his feet. When I saw him in April after the most recent season finale of  “The Biggest Loser” aired, he still had a cast on.

Soon after, he was taping NBC’s “Stars Earn Stripes,” which features celebrities learning how to be soldiers using real ammunition, real explosions, mentored by former military personnel. He admitted in an interview this week that his foot was not 100 percent when he entered the competition. “Maybe 75, 80 percent,” he said. “But I did it anyway. I’ve worked with injuries before. I had to make the best of it. I gave it a shot. I’m proud of my performance.”

He competed with the likes of Todd Palin (Sarah’s husband), actor Dean Cain, former NFL player and current actor Terry Crews, boxing champ Laila Ali and singer Nick Lachey. Each  had a military-themed charity to support, with Quince supporting Got Your 6, a campaign which is led by the entertainment industry and advocates for military veterans and families.

Quince said there was surprisingly little smack talking among the celebrities despite their naturally competitive natures. “Everyone came with a purpose to show respect and honor to the military. My previous experience with the military was watching it on TV. This brings light to a face. There’s Grady the Green Beret. This is Andrew the Marine. Every gamut of the military is covered.”

Despite spending years in rigorously good shape, Quince said replicating basic training camp was “one of  the toughest things I’ve ever done.” The most challenging: jumping out of a helicopter into a body of water wearing 70 pounds of gear.” And he had to learn how to shoot a gun. “I hope to take these skills to action films,” he said.

Palin, he said, became a good friend. “He invited me to his home in Alaska,” said Quince, who came to the national scene last year when he joined “The Biggest Loser” as a coach. During the “Stars Earn Stripes” shoot, he got to meet Sarah. “Politics aside,” he said, “she’s a great person.”

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“Stars Earn Stripes”

10 p.m. Mondays, NBC, starting August 13

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By Rodney Ho, Radio & TV Talk