A muscle injury of the hamstrings is a tension or rupture of the muscles or tendons of the hamstring group. These injuries are quite common among athletes and constitute a significant percentage of skeletal muscle injuries related to sports. A return to the sport can happen in a couple of weeks or it may never happen.
The hamstring consists of three muscles in the posterior thigh
These muscles include the middle membrane, the biceps of the thigh and the medium tension. When trying to understand the muscle injuries of the hamstring, you should keep in mind that there are many muscles, nerves and important blood vessels in the posterior femur. If the hamstrings are damaged, some of these structures can also be injured.
Muscle injuries are often found in athletes, but the frequency of injuries varies from 8% to 50% (elite soccer players), depending on the sport.
The actions of the hamstring basically reduce the knee and widen the thigh, while the biceps of the thigh contributes to the rotation of the hip joint on the outside and two other muscles, which contributes to the internal rotation of the thigh. When you move, walk or change direction while moving quickly, the hamstring group plays an important role. During movement, the popliteal joints coordinate with other muscles involved in the movement of the hip and knee, and injury to any of these key muscles affects the other muscles involved in the movement.
There are many risk factors for hamstring injuries. Some of these risk factors are subject to change and others are not. There have been many large studies that have attempted to identify risk factors or ways to reduce the risk of injury at https://nydnrehab.com/sports-medicine/sports-injuries/hamstring-strain-rehabilitation/.
However, it seems that these risk factors, which can be altered, include the following:
There are several risk factors that can not be changed. This is an increase in age, a previous injury to the hamstring or other leg muscles, and the origin of African or aboriginal origin. However, the most frequently cited risk factor is the history of a previous injury to the hamstring. Most recurrent injuries occur within two months after returning to the sport, but the risk is still three times higher than that of an athlete without a previous injury to the hamstring, up to one year after the initial injury .
If the hamstrings are not flexible, they are at a higher risk of injury
Although the flexibility of the hamstrings should be flexible, the lack of flexibility of the quadriceps, which acts as opposed to the hamstrings, and the muscles that flex the hips, should also be flexible to reduce the risk of damaging the hamstring. Athletes who can bend their knees more than 50 degrees are less likely to injure the hamstring. However, a decrease in flexibility in the muscle group that bends the thigh leads to an increase in the hamstring injury. The weak points of the hamstrings compared to the quadriceps lead to an increased risk of injury, because the hamstrings decrease the speed of the leg when running and the legs. Those athletes with stronger quadriceps may need more strength in the hamstrings to decrease the effect of the lower leg.