Aerobic Exercise

Aerobic Exercise: Top 10 Reasons to Get Physical Mayo Clinic

Baseball and Softball

Baseball Field Safety American Academy of Orthopedic Surgeons

Basketball

Basketball Injury Prevention American Academy of Orthopaedic Surgeons

Bicycling

Cycling in New York City (Health Bulletin) New York City Department of Health and Mental Hygiene (also in Chinese, Spanish)

Core Exercises

Core Exercises: 7 Reasons to Strengthen Your Core Muscles Mayo Clinic

Dancing

Let's Dance to Health AARP

Football

Football Children's Hospital of PIttsburgh

Golf

Golf Etiquette 101 United States Golf Association

Gymnastics

Gymnastics Injury Prevention American Academy of Orthopedic Surgeons

Horseback Riding

Western Riding Equiworld

Ice Hockey

Ice Hockey Children's Hospital of Pittsburgh, PA

Ice Skating

Ice Skating Safety National Safety Council

LaCrosse

Facts about LaCrosse US LaCrosse

Pilates

Pilates: A Core-Conditioning Program AARP

Rollerblading

In-line Skating Injuries in Children and Adolescents American Academy of Pediatrics

Running

Tips for Safe Running Program American Academy of Orthopedic Surgeons

Skateboarding

Skateboarding Safety American Academy of Orthopaedic Surgeons

Skiing, Sledding and Snowboarding

Cold-Weather Sports and Your Family Nemours Foundation

Soccer

Tips for Soccer Moms and Dads California State University, Los Angeles

Strength Training

Strength Training and Your Child Nemours Foundation (also in Spanish)

Stretching and Flexibility

About Stretching Exercises NASA / National Institute on Aging

Swimming

Slide Show: Aquatic Exercise How To's Mayo Clinic

Tai Chi

Tai Chi for Health Purposes National Center for Complementary and Alternative Medicine

Tennis

Be Tennis Safety Smart Riley Hospital for Children, Indianapolis IN

Volleyball

Official Site for USA Volleyball Rules and Officiating USA Volleyball

Walking

FAQ's about Walking The Walking Site

Yoga

Yoga for Health: An Introduction National Center for Complementary and Alternative Medicine