Super Bowl LVIII is this Sunday, amid decades of controversy surrounding football’s impact on traumatic brain injuries. But for many athletes, these long-term effects can be felt well before making it to the pros: on high school and college teams. On Well, Now this week: Maya and Kavita talk with physical therapist and concussion specialist John Doherty about the science surrounding youth contact sports and what we know about their relationship with brain injuries down the road. Podcast production by Vic Whitley-Berry with editorial oversight by Alicia Montgomery. Send your comments and recommendations on what to cover to wellnow@slate.com  Learn more about your ad choices. Visit megaphone.fm/adchoices