The three dirtiest words in fitness these
days are "Functional," "Movement," and "Screen" --
especially when used in that order [1].
For anyone who's unfamiliar, the Functional Movement Screen (FMS) is a series of seven functional movements (e.g. squat, push-up, lunge) designed to screen (i.e. check for) for pain, movement quality, and injury
risk.
By providing objective criteria for scoring the
various movements (‘0’ for ouch, ‘1’ for shitty, ‘2’ for passable, and ‘3’ for
perfection -- all my words, not theirs) the FMS enables practitioners to
establish a movement "baseline," as well as to identify mobility/stability
deficits and side-to-side asymmetries, which can then help guide program design.
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| The actual FMS scoring system |
Sounds like a great idea, eh? In theory,
yes. But it’s created a whole crap-ton of controversy.
Some trainers are diehard proponents of the FMS [2], using it on all of
their clients at intake and follow-up assessments for comparison to baseline.
Others think it's complete garbage, citing studies that have found the FMS’s injury prediction capabilities to be moderate at best.
It’s true: in many of the populations that have
been tested, the FMS doesn’t do a very good job of separating people who are at
risk for injury from people who aren’t. Potentially due to having too few data
points (7 screens × 3 points = 21 total points possible), it
fails to do what it was designed to do. Yikes!
Why not just change the
scoring criteria to better differentiate between performance on each test, one
might wonder? Instead of scoring from 0 to 3, why not make it, say, 0 to 5?
It turns out that by
increasing that number, you actually decrease the reliability of each score.
This is because when there are 5 possible points it’s much harder to come to a
consensus about what a ‘1’ is versus a ‘2’ or what a ‘3’ is compared to a ‘4.’
Even the most skilled testers may not give a particular movement the exact same score on a scale from 0 to 5. At that point, chaos would ensue, and the results of the screen would have even less meaning than they do now. No bueno.
Even the most skilled testers may not give a particular movement the exact same score on a scale from 0 to 5. At that point, chaos would ensue, and the results of the screen would have even less meaning than they do now. No bueno.




