I promise our lives do not revolve around football. In fact, we try to keep the football talk to a minimum in our house because we had so many years of it. For instance, we take our kids to high school sports of all kinds including volleyball, soccer, tennis, and lacrosse. I really encourage you to go to some of the local high school games because we have great sports here in the central Texas area.

Nonetheless, it’s football season in Texas and you hear about it a lot. A shocking article was brought to my attention this week. Mike tried to read it and I’m not sure he even finished it because it was like looking in a crystal ball for him and he didn’t like what he saw. But for those who can stomach the realities of the football field and graphic consequences that follow, here’s a little sample of the article:

Take the experience of a young defensive lineman for the University of North Carolina football team, who suffered two concussions during the 2004 season. His case is one of a number studied by Kevin Guskiewicz, who runs the university’s Sports Concussion Research Program. For the past five seasons, Guskiewicz and his team have tracked every one of the football team’s practices and games using a system called HITS, in which six sensors are placed inside the helmet of every player on the field, measuring the force and location of every blow he receives to the head. Using the HITS data, Guskiewicz was able to reconstruct precisely what happened each time the player was injured.

“The first concussion was during preseason. The team was doing two-a-days,” he said, referring to the habit of practicing in both the morning and the evening in the preseason. “It was August 9th, 9:55 A.M. He has an 80-g hit to the front of his head. About ten minutes later, he has a 98-g acceleration to the front of his head.” To put those numbers in perspective, Guskiewicz explained, if you drove your car into a wall at twenty-five miles per hour and you weren’t wearing your seat belt, the force of your head hitting the windshield would be around 100 gs: in effect, the player had two car accidents that morning. He survived both without incident. “In the evening session, he experiences this 64-g hit to the same spot, the front of the head. Still not reporting anything. And then this happens.” On his laptop, Guskiewicz ran the video from the practice session. It was a simple drill: the lineman squaring off against an offensive player who wore the number 76. The other player ran toward the lineman and brushed past him, while delivering a glancing blow to the defender’s helmet. “Seventy-six does a little quick elbow. It’s 63 gs, the lowest of the four, but he sustains a concussion.”

“The second injury was nine weeks later,” Guskiewicz continued. “He’s now recovered from the initial injury. It’s a game out in Utah. In warmups, he takes a 76-g blow to the front of his head. Then, on the very first play of the game, on kickoff, he gets popped in the earhole. It’s a 102-g impact. He’s part of the wedge.” He pointed to the screen, where the player was blocking on a kickoff: “Right here.” The player stumbled toward the sideline. “His symptoms were significantly worse than the first injury.” Two days later, during an evaluation in Guskiewicz’s clinic, he had to have a towel put over his head because he couldn’t stand the light. He also had difficulty staying awake. He was sidelined for sixteen days.

When we think about football, we worry about the dangers posed by the heat and the fury of competition. Yet the HITS data suggest that practice—the routine part of the sport—can be as dangerous as the games themselves. We also tend to focus on the dramatic helmet-to-helmet hits that signal an aggressive and reckless style of play. Those kinds of hits can be policed. But what sidelined the U.N.C. player, the first time around, was an accidental and seemingly innocuous elbow, and none of the blows he suffered that day would have been flagged by a referee as illegal. Most important, though, is what Guskiewicz found when he reviewed all the data for the lineman on that first day in training camp. He didn’t just suffer those four big blows. He was hit in the head thirty-one times that day. What seems to have caused his concussion, in other words, was his cumulative exposure. And why was the second concussion—in the game at Utah—so much more serious than the first? It’s not because that hit to the side of the head was especially dramatic; it was that it came after the 76-g blow in warmup, which, in turn, followed the concussion in August, which was itself the consequence of the thirty prior hits that day, and the hits the day before that, and the day before that, and on and on, perhaps back to his high-school playing days.

This is a crucial point. Much of the attention in the football world, in the past few years, has been on concussions—on diagnosing, managing, and preventing them—and on figuring out how many concussions a player can have before he should call it quits. But a football player’s real issue isn’t simply with repetitive concussive trauma. It is, as the concussion specialist Robert Cantu argues, with repetitive subconcussive trauma. It’s not just the handful of big hits that matter. It’s lots of little hits, too.

I love football. But this is scary info. The article goes on to compare football players to Marines and fighting dogs because they are selected for their “gameness” because they “persevere even in the face of injury and pain.” The researchers do not find this to be a healthy characteristic. There are several sides to this argument but some of the data in this article is a little jarring. Read the full article and comment for or against the article’s argument on our website.