Todd gave Hayden a curious look as they ran on the treadmills side-by-side. Finally he stopped his and climbed down. Then he pressed the controls to slow Hayden's. She looked at him in surprise for a moment before it came to a complete stop.

"Are you okay?" he asked.

"What?"

"You've been running hard for nearly the entire time. What happened to intervals?"

"I was?" She couldn't believe that, but she had been so deep in thought that she had forgotten ...