Health issues in American football

Health issues in American football comprise a large number of health risks associated with participating in the sport. Injuries are relatively common in American football, due to its nature as a full-contact game. Injuries occur during both practice and games. Several factors can affect the frequency of injuries: epidemiological studies have shown older players can be at a greater risk, while equipment and experienced coaches can reduce the risk of injury. Common injuries include strains, sprains, fractures, dislocations, and concussions. Concussions have become a concern, as they increase the risk of mental illnesses like dementia and chronic traumatic encephalopathy (CTE). In individual leagues like the National Football League (NFL) and National Collegiate Athletic Association (NCAA), a public injury report is published containing all injured players on a team, their injury and the game-day status of each player.

Catastrophic injuries—defined as serious injury to the spine, spinal cord, or brain—and fatalities are uncommon in football; both have become less common since the 1970s, although a small number of them still occur each year. Both concussions and catastrophic injuries can be caused by helmet-to-helmet collisions as well as impact against the ground or other players' knees; in other cases, they can be caused by players who have sustained a head injury returning to play, which can place the player at risk of sustaining a severe injury. Despite the decrease in catastrophic injuries, a greater number of NFL players have reported major injuries and shortened careers since the 1970s, in part due to the increasing size and speed of players and the use of artificial turf.

In many cases, injuries sustained while playing can cause long-term damage. In addition to neurological damage caused by hits to the head, injuries to the mid and lower body can force players to retire or lead to nagging ailments in later life. Various methods have been used to reduce injuries in football, including rule changes such as the abolition of large wedge formations; a sharp decline in cervical spine injuries since the 1970s has been attributed to rule changes that altered blocking and tackling techniques. More recently, rule changes to protect players from head injuries have been instituted. Equipment like the football helmet and pads are used to give players a level of protection from injuries, while other factors such as cleat size are used to minimize the risk of injuries due to field condition.