The Power of Size

Of the 89 players on Trinity High School's varsity team, 18 of them weigh over 250 pounds. More

Coming Apr 12. Of the 89 players on Trinity High School's Varsity team, 18 of them weigh over 250 pounds. Football observers agree that on average, high school players' size, speed and strength have increased dramatically over the past five to 10 years. As the size of the players -- and the intensity of the sport -- grows, FRONTLINE investigates if enough is being done to keep kids safe.

AIR DATE 4/12/11