It’s not like anyone thought head injuries were good for people, but the long term effects of concussions has researchers, coaches, and doctors concerned about the extra risks of some popular sports.

Howcast - Learn how to do round off handspring drills in this Howcast video with Dulles Gymnastics Academy.

Howcast - Learn how to do a round off in this Howcast video with Dulles Gymnastics Academy.

Howcast - Learn how to be a cheerleader from UCA instructor Ashley Cowan of Varsity.com in this Howcast video.

Howcast - Learn if cheerleading is a sport from UCA instructor Ashley Cowan of Varsity.com in this Howcast video.

Howcast - Learn about UCA instructor Ashley Cowan of Varsity.com, one of Howcast's cheerleading experts, in this video.

Howcast - Discover how to learn a cheerleading dance from UCA instructor Ashley Cowan of Varsity.com in this Howcast video.

Howcast - Learn cheerleading stretches that improve flexibility from UCA instructor Ashley Cowan of Varsity.com in this Howcast video.

Howcast - Learn cheer tumbling basics and drills from UCA instructor Ashley Cowan of Varsity.com in this Howcast video.

Anxiety is just part of being teen. In this program students will learn 5 coping skills that will help them to manage their feelings of anxiety. When Claire has to make a presentation in front of her class, she learns that planning and...

Anxiety is just part of being teen. In this program students will learn 5 coping skills that will help them to manage their feelings of anxiety. When Claire has to make a presentation in front of her class, she learns that planning and...

FAIRFAX, VA - JANUARY 24: SHY AnnCatherine Heigl, who has Down syndrome, shocked her family when she came home one day saying she wanted to become a cheerleader. Known as ‘AC’, she had already exceeded expectations playing tennis at her...