All football injuries occur either during training or a game via high speed combined with full contact. Overuse is also a factor in football injuries and traumatic injuries such as concussions are most common. The force applied during a tackle, bringing the opponent to the ground or resisting being forced to the ground makes all football players prone to injuries anywhere on their bodies. This can happen even while wearing protective equipment. Traumatic Injuries Knee injuries in football are the most common, especially to the anterior and posterior cruciate ligaments, and the meniscus. These can leave a player out of the game for extended periods while they recover. There is also a higher risk of ankle sprains among football players because of the surfaces they play on and the cutting motions of the sport. Shoulder injuries are the next most common injuries of the game. The labrum, the cartilage bumper that surrounds the socket of the shoulder, is particularly susceptible to injury. Concussions Concussions are also very common in the game. This is a change in mental state due to a traumatic impact. Not ll people who suffer a concussion will be knocked unconscious. Some symptoms of a concussion include headache, dizziness, nausea, loss of balance, drowsiness, numbness, tingling, difficulty concentrating, and blurry vision. Clearance should be granted by a healthcare professional before any player returns to football. Overuse Injuries Lower back pain and general back pain in common in football players and are often due to overuse. It can lead to overtraining syndrome when a player pushes themselves beyond the point where their body can effectively recover. Patellar tendinitis, or knee pain, is another overuse injury suffered by football players, usually treated by a quadricep strengthening program. Heat Injuries Heat injuries are a major concern for most young players just starting out. It is often occurring during the hottest and most humid months of the year. The intense activity can result in excessive sweating, depleting the body of salt and water. The early symptoms include cramping of major muscle groups. If not treated, by cooling and fluid replacement, it can lead to heat exhaustion and heatstroke.