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Functional Classification of Joints

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The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
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Functional Movement Screen Task Scores and Joint Range-of-motion: A Construct Validity Study.

Cesar A Hincapié^1,2, George A Tomlinson³, Malinda Hapuarachchi⁴

¹Department of Chiropractic Medicine, Balgrist University Hospital, Zurich, Switzerland.

International Journal of Sports Medicine

|November 29, 2021

Summary

This summary is machine-generated.

The Functional Movement Screen (FMS) shows limited construct validity. Higher FMS scores correlate with greater joint range-of-motion (ROM), but significant overlap exists, questioning its specificity.

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Area of Science:

Sports Medicine
Biomechanics
Kinesiology

Background:

The construct validity of the Functional Movement Screen (FMS) remains largely unexplored.
Understanding the relationship between FMS performance and objective physiological measures is crucial for its application in sports and rehabilitation.

Purpose of the Study:

To evaluate the construct validity of the FMS by examining associations between FMS task scores and maximum joint range-of-motion (ROM).
To investigate how FMS performance relates to specific joint mobility in university varsity athletes.

Main Methods:

101 university varsity student-athletes from four sports (volleyball, basketball, ice hockey, soccer) participated.
Athletes completed standardized FMS assessments and had their maximum ankle, hip, and shoulder ROM measured.
Multivariable linear regression analyses were employed to determine associations between FMS scores and ROM measurements.

Main Results:

A general trend indicated that higher FMS task scores were associated with greater joint ROM.
Specifically, athletes scoring higher on the FMS squat task demonstrated increased uni-articular ankle dorsiflexion ROM compared to those with lower scores.
However, substantial overlap in ROM measurements was observed across different FMS score groups.

Conclusions:

The findings suggest that while higher FMS scores may correlate with increased joint ROM, the significant overlap between score groups challenges the FMS's construct validity as a precise indicator of specific joint mobility.
Further research is needed to refine the interpretation and application of FMS scores in assessing movement quality and injury risk.