This weekend, thousands of runners will flood the streets of Lincoln for the 31st annual Lincoln Marathon.

While some runners will be running for the fun, one Lincoln man has another motive to cross the finish line.

It takes more than 26,000 steps to complete a half marathon. "I try to train at least a few times a week," said Scott Ash, Lincoln.

For Scott Ash, each step of the Lincoln Half-Marathon will mean more. He's running to raise money for service men and women who suffer from Traumatic Brain Injury or TBI.

"Traumatic Brain Injury is when the brain is disrupted by a blow to the skull or the head striking against an object," said Lori Terryberry-Spohr, Madonna Rehabilitation Hospital.

Dr. Terryberry-Spohr treats soldiers with TBI, injured by IED and mortar blasts in Iraq. Her unit at Madonna Rehabilitation Hospital sees military members from around the country.

"TBI has been referred to as the silent injury because many times there's no external sign of it, but the person has changed as a result of their injuries," Terryberry-Spohr said.

Every patient is different, but Madonna Rehabilitation Hospital helps them cope with their injuries through different kinds of therapy designed to get them back to their daily lives.

"I wear this bracelet right here. I've worn it for a couple years, and that's about all I've done to support our troops," Ash said.

But Ash decided to do more. He set out to raise $1,000 for the Madonna Rehabilitation Hospital. It took him just two hours to reach that goal.

"I figured if I can do that in two hours, why not up the ante a bit? I just kind of added a zero to the end and said let's go for 10,000," Ash said.

So far, he's raised about $5,000. Step by step, he's confident he'll meet his goal.

"I think Sunday when I'm running, I'm going to try to put myself in the shoes of those victims and what they're going through both physically and mentally and realize that what I'm going through for a couple hours on that Sunday is nothing compared to what they're giving up," Ash said.