"I was a little nervous," the former Gamecocks running back said. "But excited, too, that I could do this."
Lattimore did a series of exercises designed to demonstrate the progress of his surgically repaired knee. He dislocated the knee and tore several ligaments against Tennessee at Williams-Brice Stadium in October.
He did step-ups, box jumps, deep-knee bends, forward and backward lunges and one-legged balancing drills while holding weights for a group that included Marvin Lewis of the Cincinnati Bengals, the only head coach at the workouts.
Lattimore received a loud cheer from former teammates and coaches as well as evaluators from the 31 NFL teams attending Wednesday's workouts.
Later, Lattimore caught passes with running backs and receivers -- although he walked out to a designated spot to catch the simple throws from former South Carolina passers Syvelle Newton and Seth Strickland.
Lattimore hopes he answered enough questions to gain a spot in next month's NFL draft.
"They've seen me move a little bit. They've seen me use my feet, use my knee," he said. "My knee's fine. I think everything's going to be all right."
It didn't look that way five months ago. Lattimore had returned from a left-knee injury during his sophomore season and was among the Southeastern Conference's top rushers heading into the game with the Vols.
But Lattimore's season ended in the second quarter on Oct. 27 when he was tackled at the end of a run. His right leg flopped over like a rag doll's limb, and trainers had to keep pushing Lattimore's head and chest down to keep him from seeing the damage.
Players from Tennessee joined South Carolina teammates in wishing Lattimore well before he was driven off the field in shock. He was considered a first-round NFL draft pick prior to the injury.
Lattimore has given up worrying about where or if he'll go in the draft.
South Carolina coach Steve Spurrier said Lattimore's workout was remarkable given how badly damaged the knee was. In Spurrier's eyes, it put Lattimore back in the running to hear his name called early in the draft.
"You'd think he's 100 percent," Spurrier said. "He was very impressive."
Lattimore was happy with his limited workout — although he pushed his doctors and agent to do more.
Lattimore knows he has more work to do. He won't hold a personal pro day as he planned in January, instead letting his meetings with teams at the NFL combine and here, along with progress reports from surgeon Dr. James Andrews, make his case.
He has met with Philadelphia and has individual interviews set up with New England and St. Louis. He has a sponsorship agreement with EAS Nutrition that both sides hope can become a long-term arrangement.
Lattimore is confident he can play in the NFL this year. He'll have his knee examined by NFL personnel in Indianapolis on April 5-6 and then wait for the draft.
"Once I get on a team, I'll prove myself and prove that I'm a complete back," Lattimore said. "I'll be in full health, so I'll be good to go."