Is This Fitness Guru With Eight-Pack Abs Too Young?

C.J. Senter plays basketball with his friends, hides and seeks, runs track in school and plays football. Pretty normal. What's not normal for the average 10 year old -- or really the average any age for that matter -- is his eight-pack abs.

Senter, who is also known as "the workout kid", works out, eats right and is trying to inspire others his age to do the same. With a line of workout videos many schools and individual families are becoming familiar with the Senter routine.

ABC Nightline recently interviewed Senter and doctors posing the question "Is there such a thing as too much?":

ABC reports Dr. Robert Gotlin, director of Orthopedic and Sports Program at Beth Israel Medical Center in New York City, as stating that there is such a thing as overdoing it, which is the case at any age, but he has seen a rise in youth stress injuries:

"In my practice now, I've seen doubling of injuries to young kids, age 10 or 9 or 8, with overuse injuries because they're doing more now," [he said.]

Gotlin said that while tendonitis is the most prevalent ailment he has seen in active children, he has also seen young patients with bruising, as well as bone and ligament injuries.

"The problem with ligament injuries in children is the fact that ligaments in kids are very, very strong," he said. "So what happens is they don't tear but they pull the bone. And the ligament can actually pull the bone off the bone."

What is safe, Gotlin says, is an hour of working out with water breaks intermixed.

In the interview, Senter's parents say C.J. wanted to exercise, eat veggies instead of junk and create workout videos for his peers. They aren't in it for the money, stating they had given away as many DVDs as have been sold.

According to the National Center for Health Statistics, nearly a third of children and teens are considered overweight. C.J. and his parents believe his workout videos could be an inspiration. Find C.J.'s Workout Kid DVD's here.