Tiki Barber on fitness, Reebok Spartan Race

Tiki Barber runs through the gauntlet in Times Square to promote the Reebok Spartan Race. Courtesy of James Devaney Photography

Leaving the NFL behind in 2006, former All-Pro Tiki Barber always wanted to remain in shape.

"I still look for athletic challenges," said the 37-year-old Barber, who rushed for 10,449 yards, all with the New York Giants (1997-2006). "I work out three or four times a week. I just love the feeling of getting exhausted. It's like a sense of accomplishment."

On Thursday afternoon in New York, the 5-foot-10, 200-pound Barber joined actress Brooklyn Decker to take part in an extreme obstacle race course to promote the multiyear partnership of Reebook and Spartan Race.

The course in Times Square featured a 7-foot wall climb, a 75-foot sandbag carry and a host of other obstacles to replicate the worldwide Spartan Race, which is a series of obstacle races of varying distances and difficulties.

"This was pretty easy because it was a short course," Barber said. "I might start training for the real one to see if I can do it. This might be something I'll gravitate toward."

Barber took up this off-beat training in 2005. He started powerlifting with former competitive lifter Joe Carini and "started pulling sleds and lifting tires," Barber said. "The Reebok Spartan Race takes advantage of all those athletic traits we think we have and challenges us."

And how did Decker do Thursday afternoon?

"She's not an athlete in the truest sense of the word, but she paced herself to get through it," Barber said of the swimsuit model. "It's great to see her out there trying. It gives a sense that anyone can do it."