I barely hung in there.

At the end of the hour and a half, I asked Walston, "So I came out here first day, be honest, how did I do?"

He answered, "I thought you did a great job. You put out. You gave 110 percent. You didn't quit."

Two weeks later, we checked in on graduation day.

Only one student dropped out due to injury.

Afanador and Eaton said it brought them closer to each other and their teammates.

"Each day, you're stronger than the next and you just want to push past your limits," Afanador said.

After that one work out, I was sore for a week. I have a new respect for those who can hack it.