Factors for knee injury in habitual runners

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Running is a popular form of exercise all over the world. Many do it for fitness all through out the year. According to a USA based statistics 36 million Americans participate in running each year, with 10.5 million running at least 100 days per year. Although running injuries are well understood medically, their potential risk factors are not.
All behavioral and physiological risk factors influences potential knee injury mechanisms, including knee joint forces and knee moments.
According to research carried out by Messier SP et al the most important factors for running knee injuries are due to increased knee loads. Larger knee joint loads are due to poor hamstring flexibility, greater body weight, greater weekly mileage etc. Most of these risk factors could potentially be modified to reduce joint loads to lower the risk of injury.

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