The Functional Movement Screen is a series of 7 movements used to evaluate for muscle imbalances and movement dysfunctions. 

The biggest predictor of suffering a future injury is a history of previous injury. This means that even after the pain is gone, there is still work to be done to correct muscle imbalances and movement dysfunctions to prevent the injury from coming back. 

The Functional Movement Screen (FMS) assesses your risk of future injury by evaluating the quality of your movement. Each of the seven functional movements are graded on a scale of 0-3. The goal of the screen is to score above a 14 with no asymmetries or pain during the movements. 

Functional Movement Screen Research

This study adds to the growing body of evidence demonstrating a predictive relationship between Functional Movement Screen composite scores and the development of injury. These study findings are consistent with previous studies that demonstrate that a Functional Movement Screen score less than 14 is associated with increased risk of injury. For maximal predictive power, a Functional Movement Screen score less than 14 combined with a history of previous injury provides the greatest indicator of future injury
— International Journal of Sports Physical Therapy
An athlete had an approximately 4.7 times greater chance of suffering a lower extremity injury during a regular competitive season if they scored less than 17 on the Functional Movement Screen
— International Journal of Sports Physical Therapy
The current study identified the deep squat and active straight leg raise score as a more effective method than the composite score to screen the risk of running injuries in competitive male runners
— Journal of Strength and Conditioning Research