"One moment," said Dr. Bentley. He felt Dave's pulse, then nodded.
"Go ahead, Darrin."

Dave started in with the work.

"Speed it up!" ordered Dick. "Faster! Drive!"

Darry continued at his training work until Dr. Bentley called:

"Stop! Now, stand still, young man."

Bending over, Dr. Bentley placed one ear against Dave's chest, watch in hand, while the others looked on curiously.

"Just what I thought," nodded the physician, looking up at last. "Prescott, you have a lot of bright ideas in training, but you're driving your squad too hard. Darrin's heart doesn't come down to normal speed as soon as it should."

"Anything wrong with the heart, sir" asked Darry.

"Nothing. It's the trainer that's wrong," replied Dr. Bentley. "It is a fault with a lot of trainers without long experience that they work an athlete's heart overtime. Darrin's heart should have slowed down in a little more than half the time required in this instance. Set another man at work, Prescott. I can show you how to do this properly. Let the others work as hard as Darrin did. I want data to work on. Then I'll lay down a few suggestions that will serve you well."

This not being interesting to the high school girls, they chatted among themselves.