The Functional Movement Screen: a Reliability Study
This article found that the FMS composite score demonstrated moderate to good interrater and intrarater reliability.
Reference
Teyhen, D., Shaffer, S., Lorenson, C., Halfpap, J., Donofry, D., Walker, M., . Childs, J. (n.d.). The Functional Movement Screen: A Reliability Study. Journal of Orthopaedic& Sports Physical Therapy, 530-540