Functional Movement Screening (FMS) has become a cornerstone of modern sports medicine and athletic training, offering a systematic, repeatable method for evaluating how an athlete moves. Rather than waiting for an injury to occur, FMS provides a proactive snapshot of fundamental movement quality, highlighting asymmetries, compensations, and weak links. By catching these issues early, trainers, physical therapists, and strength coaches can design targeted interventions that reduce injury risk while improving overall performance. In a world where athletes are pushed to their limits, understanding the role of FMS in identifying injury risks is no longer optional—it is essential for long-term health and athletic longevity.

What Is Functional Movement Screening?

Developed in the late 1990s by physical therapists Gray Cook and Lee Burton, the Functional Movement Screen is a standardized assessment tool that scores seven fundamental movement patterns. The premise is simple yet powerful: if an athlete cannot perform basic movements correctly, they are more likely to compensate with poor mechanics during sport-specific activities, increasing the risk of injury. FMS does not diagnose pathology; rather, it identifies movement dysfunctions that may predispose an athlete to harm.

The screening process takes approximately 15–20 minutes and can be administered by any certified professional. Each of the seven tests is scored on a 0–3 scale, with the final composite score (out of 21) used as a general indicator of movement quality. Research has consistently shown that athletes scoring below 14 on the FMS are at a significantly higher risk of injury, particularly in high-intensity sports like football, basketball, and soccer.

Beyond injury prediction, FMS serves as a communication tool between coaches, medical staff, and athletes. It creates a shared language around movement deficits, making it easier to develop corrective strategies that are both evidence-based and practical.

The Science Behind FMS: How It Identifies Risk

At its core, FMS is rooted in biomechanics and motor control. The human body is designed to move through coordinated, multi-joint patterns. When one segment is restricted or weak, adjacent segments compensate, often leading to overuse, strain, or acute injury. FMS identifies these chain reactions before they become symptomatic.

Key Concepts in Movement Screening

  • Asymmetry: Differences between left and right sides of the body are strong predictors of injury. FMS highlights asymmetries in mobility, stability, or strength that may go unnoticed during sport.
  • Compensation patterns: Athletes often “cheat” a movement to achieve a task, using hip hinge when squat depth is limited or excessive arching during a push-up. These compensations load tissues improperly.
  • Motor control: A low score may indicate a lack of neuromuscular coordination, not just tightness or weakness. This makes FMS valuable for neuromechanical re-education.

By identifying these underlying issues, FMs provides a roadmap for corrective exercise programming. For example, an athlete with a poor deep squat score might need ankle mobility drills, hip hinge retraining, or core stability work—each tailored to the specific deficit revealed by the screen.

The Seven Fundamental Movement Patterns

Each test in the FMS battery isolates a specific movement demand. Below is a breakdown of what each test evaluates and why it matters for injury prevention.

  • Deep Squat: Tests bilateral, symmetrical mobility of the hips, knees, and ankles, along with core stability and shoulder flexion. A poor score often correlates with knee and low back issues.
  • Hurdle Step: Assesses stepping mechanics, balance, and hip mobility. It reveals asymmetries in coordination and foot placement that can lead to hamstring or ankle injuries.
  • In-Line Lunge: Evaluates trunk stability, hip mobility, and knee control during a staggered stance. Common compensations include excessive trunk lean or valgus knee collapse.
  • Shoulder Mobility: Measures bilateral shoulder range of motion and scapular control. Deficits here are linked to rotator cuff problems, impingement, and labral tears.
  • Active Straight-Leg Raise: Assesses hamstring and hip flexor flexibility while maintaining pelvic stability. Poor scores are associated with low back pain and hamstring strains.
  • Trunk Stability Push-Up: Tests core stability and upper body strength in a closed-chain position. Failure may indicate poor lumbopelvic control, predisposing athletes to back injuries.
  • Rotary Stability: The most complex test, evaluating multi-planar trunk stability and neuromuscular coordination. It is particularly relevant for sports involving twisting or rotational forces.

Scoring and Interpretation

Each movement is scored from 0 to 3 based on specific criteria.

  • 3 – The movement is performed perfectly, with no compensations.
  • 2 – The movement is completed but with some compensation (e.g., feet turning out, wobbling).
  • 1 – The athlete cannot complete the movement pattern, even with compensation.
  • 0 – Pain occurs during the test, regardless of form.

The five tests with left/right sides (hurdle step, in-line lunge, shoulder mobility, active straight-leg raise, rotary stability) also generate asymmetry scores. Any asymmetry of one point or more is flagged as a red flag. Research consistently shows that athletes with two or more asymmetries have a dramatically higher injury rate, even if their composite score is above 14.

The total composite score (out of 21) is a general risk marker. A score of 14 or lower has been widely cited as a threshold for increased injury risk in athletic populations. However, experts caution that the composite score should never be used in isolation—the individual test scores and asymmetry data are far more actionable for designing corrective programs.

Implementing FMS in Athletic Training Programs

Integrating FMS into a training regimen requires a systematic, periodized approach. The screen itself is just the first step; the real value lies in how the results are used to inform training decisions.

When to Screen

FMS is most valuable during the off-season, preseason, or after an injury. Screening at these times allows for a full corrective cycle before the athlete returns to high-intensity sport. In-season screening can also be useful, especially after a layoff or when performance plateaus. Typically, a re-screen every 4–6 weeks allows assessment of progress.

From Screen to Program

Once the screen is complete, trainers should prioritize deficits based on severity and impact. For example:

  • Pain scores (0) require immediate referral to a medical professional.
  • Asymmetries should be corrected first, as they carry the highest injury risk.
  • Low individual scores (1s) are addressed with targeted corrective exercises.

Corrective exercise programming follows a “regress to fix, then progress to load” philosophy. This means breaking the faulty pattern down into simpler components, restoring mobility or stability, and then rebuilding the movement pattern under gradually increasing demands.

Examples of Corrective Strategies

  • Poor deep squat → Ankle banded mobilizations, hip flexor release, goblet squat with heel lift, then full-depth bodyweight squat.
  • Asymmetric shoulder mobility → Sleeper stretch, thoracic spine rotation drills, then controlled scapular retraction with band pull-aparts.
  • Trunk stability push-up score of 1 → Planks with core bracing, push-up on knees with a conscious effort to keep spine neutral, then full push-up.

The FMS system also provides a library of specific correctives linked to each test, making it easier for coaches to prescribe evidence-based exercises without guesswork.

Evidence and Outcomes: Does FMS Reduce Injury Rates?

A growing body of research supports the use of FMS for injury prediction, but the evidence is nuanced. A landmark study published in the Journal of Strength and Conditioning Research followed 238 professional football players and found that those scoring ≤14 on the FMS had an 11.7% higher injury rate than those scoring above 14. When players also had asymmetries, the risk became even more pronounced.

Several other studies have replicated these findings in different populations:

  • In collegiate soccer players, a FMS composite score of ≤14 predicted non-contact injuries with a sensitivity of 0.83.
  • In military recruits, the FMS identified those at higher risk of musculoskeletal injury during basic training.
  • In Division I basketball players, those with a composite score below 14 missed significantly more games due to injury.

However, not all studies have shown strong predictive power. Critics point out that FMS is a general movement screen and cannot account for sport-specific demands, training volume, or psychological factors. A meta-analysis in Sports Medicine (2016) concluded that while FMS scores are moderately associated with injury risk, the tool is far from perfect and should be used alongside other assessments.

The most compelling evidence comes from intervention studies: teams that implement FMS-based corrective training often see a decrease in injury rates compared to historical baselines or control groups. For example, a study on NFL players showed that off-season corrective programs based on FMS results reduced the number of missed practices and games due to strain injuries by nearly 50%.

For a deeper dive into the research, see this systematic review on FMS and injury prediction published in the British Journal of Sports Medicine.

Limitations and Considerations

While FMS is a valuable tool, it is not a crystal ball. There are important limitations every coach and clinician must understand to avoid over-reliance or misuse.

Not a Standalone Predictor

Injury is multi-factorial. Training load, recovery, nutrition, psychological stress, and previous injury history all play major roles. FMS identifies movement dysfunctions, but it cannot predict traumatic injuries (e.g., collisions) or overuse injuries caused by excessive volume alone. It is best used as one piece of a comprehensive screening battery.

Need for Trained Assessors

FMS scoring is subjective. While inter-rater reliability is generally high for certified individuals, untrained assessors can produce inconsistent results. Certification through the official FMS company is strongly recommended to ensure validity.

Sport-Specific Caveats

Some sports require asymmetrical movement patterns by design (e.g., baseball pitching, javelin throwing). In these cases, small asymmetries may be normal and even necessary for performance. The FMS manual advises that for overhead throwing athletes, the dominant shoulder may naturally have greater external rotation, which should be interpreted with context.

Time and Resources

Administering and interpreting FMS takes time and practice. For large teams, screening every athlete may be impractical. Many programs opt to screen only at-risk populations, such as players returning from injury or those with a history of recurrent problems.

Integrating FMS with Other Screening Tools

To build a more complete picture of an athlete’s injury risk, many practitioners combine FMS with other assessments. Some common pairings include:

  • Y-Balance Test (YBT): Measures dynamic balance and reach asymmetry, particularly in the lower quarter and upper quarter. FMS identifies movement quality, while YBT adds a functional stability component.
  • Isokinetic Strength Testing: Provides objective data on muscle strength ratios (e.g., hamstring-to-quadriceps ratio), which can reveal imbalances that FMS may only hint at.
  • Force Plate Analysis: Measures ground reaction forces and symmetry during jumps and landings. This is more sport-specific than FMS but lacks the screening breadth.
  • Subjective Questionnaires: Tools like the Functional Movement Assessment (FMA-1) or the Oslo Sports Trauma Research Center (OSTRC) questionnaire capture pain and function data that complement movement screens.

By triangulating data from multiple sources, sports medicine teams can make more confident decisions about training modifications, load management, and return-to-play timelines.

For an example of how FMS integrates with other tests, refer to this practical guide on combining FMS and Y-Balance testing in athletes.

Conclusion

Functional Movement Screening offers a systematic, evidence-based way to identify movement deficiencies that increase injury risk. By evaluating fundamental patterns like squatting, lunging, and stability, FMS gives coaches and clinicians actionable data to design corrective programs that reduce asymmetries, improve motor control, and ultimately keep athletes healthier. The tool is not perfect—it requires trained administration, context-aware interpretation, and integration with other assessments—but when used correctly, it is one of the most powerful early-warning systems available in sports medicine.

As the field of athletic performance continues to evolve, the role of FMS is likely to grow, especially with advances in technology such as 3D motion capture and AI-driven movement analysis. But for now, a simple, low-cost, low-tech screen that can save an athlete from a season-ending injury remains an indispensable part of any comprehensive injury prevention program.

For further reading on the implementation of FMS in team settings, the National Strength and Conditioning Association offers excellent resources on FMS screening and corrective programming.