Serial Functional Performance Testing for Causation

How Serial Functional Performance Testing Documents the Recovery Trajectory That Supports Causation

After a collision on I-10 or a workplace impact near the Franklin Mountains, many patients can describe how they feel on a single visit. They report pain, stiffness, or fatigue. Attorneys, however, need more than a snapshot. They need a clear, time-stamped record showing that the limitations began with the trauma, changed in a predictable way with care, and either resolved or left a measurable residual deficit. Serial functional performance testing provides that longitudinal evidence. At Injury Medical Clinic PA, Dr. Alex Jimenez, DC, APRN, FNP-BC, co-documents repeated movement screens, step-down and load-progression data, and work-simulation metrics. These objective numbers help separate the accident’s effects from the patient’s pre-injury capacity.

Tracking Change Over Time With Consistent Screens

Consider a 34-year-old warehouse selector who lifted 40-pound cases for eight-hour shifts before a rear-end crash. Two weeks later, he can still lift a 10-pound box once, but he cannot repeat the motion without form breakdown or increased pain. A single strength test might look unremarkable. When the same test is repeated at four weeks, eight weeks, and twelve weeks under identical conditions, the pattern becomes clear. Load tolerance rises only when joint motion and muscle control improve. When symptoms or mechanics limit further progression, the plateau is recorded. Attorneys can use that trajectory when a defense expert claims the patient simply “got better” or “never lost capacity.”

Serial testing begins with a consistent set of movement screens performed the same way each visit. Common screens include a body-weight squat, single-leg step-down, and hip-hinge pattern. The clinician notes depth, control, symmetry, and any compensatory strategies. Early after trauma, the patient may drop the opposite hip during a step-down or lose lumbar neutrality during a hinge. Weeks later, the same screen shows improved control at a greater range. Because the protocol does not change, the difference can be attributed to recovery rather than to a different test or different examiner. These screens are not diagnostic on their own; they document functional capacity that can be compared with the patient’s reported work and daily demands.

Load-Progression and Work-Simulation Metrics

Load-progression data adds a quantitative layer. Once basic control is restored, the patient advances through controlled external loads—medicine-ball carries, cable pulls, or progressive step-downs with hand weights. The clinician records the highest load completed with proper form and without a lasting increase in symptoms. A patient who begins at 8 pounds and advances to 25 pounds over six weeks demonstrates capacity growth. If progression stalls at 15 pounds because the lumbar spine loses neutral or the patient reports sharp pain, that ceiling is documented. The record shows both the improvement that occurred and the residual limitation that remains. For an attorney building a future-care claim or a permanent-impairment argument, the numbers supply an objective basis for why certain job tasks still cannot be performed safely.

Work-simulation metrics translate the clinic findings into job-relevant language. A delivery driver may be timed while repeatedly entering and exiting a simulated vehicle and then carrying a weighted package a short distance. A nurse may be asked to push a weighted cart and then perform a floor-to-waist lift of a mannequin limb. These tasks are scored for duration, number of safe repetitions, and any protective postures or early fatigue. Because the same simulations are repeated, the file can show, for example, that safe package carries increased from three to eight over eight weeks, yet the patient still cannot complete a full simulated shift without rest. The data help separate the traumatic effect from ordinary deconditioning or age-related change.

Strengthening the Causation File

These serial records strengthen establishing medical-legal causation in personal injury at https://dralexjimenez.com. When baseline reconstruction has already documented that the patient performed unrestricted lifting and prolonged standing before the accident, the post-injury trajectory supplies the second half of the comparison. Consistent methods, dated measurements, and dual-scope clinical notes allow an attorney to show that the measured deficits track the collision mechanism rather than an unrelated condition. Related discussions of baseline reconstruction and causation opinions appear on the same site and can be referenced when introducing the functional data.

Bioethical Principles Guiding the Process

The approach follows clear bioethical principles. Beneficence is served by progressive, capacity-building recovery: each increase in load or complexity is chosen because it moves the patient closer to the functional demands of work and life. Non-maleficence is protected because the clinician increases load only when form remains acceptable, and symptoms do not escalate. If a step-down produces pain or loss of control, the clinician stops, documents the response, and either modifies the task or maintains the current level until the patient is ready. Autonomy is advanced because the patient sees and owns the serial testing record. The patient reviews scores and progression notes at each visit and can share them with counsel. The patient understands both the gains and the remaining limits, supporting informed decisions about work restrictions, further care, or settlement.

What Makes the Clinic Unique in El Paso

What makes Dr. Jimenez’s Injury Medical Chiropractic and Functional Medicine Clinic unique is the presence of a medical director, Dr. Maria Guadalupe Cardenas, MD, together with a nurse practitioner specializing in soft-tissue injury. Dr. Jimenez holds dual licensure as a Doctor of Chiropractic and a Board-Certified Family Practice Nurse Practitioner (FNP-BC)/Advanced Practice Registered Nurse. The clinic is the only facility in El Paso, Texas, that integrates these scopes under one roof for personal-injury recovery and functional performance testing. Medical oversight from Dr. Cardenas supports risk stratification and coordination of any necessary laboratory or imaging studies, while Dr. Jimenez’s dual training allows the same clinician to perform and document both the structural and the functional measurements that attorneys require.

Application for Athletes and Physically Demanding Work

For patients who train or work in physically demanding roles, the same serial process used in rehabilitation also guides return-to-activity decisions. An athlete who can complete a controlled single-leg hop series without compensatory trunk lean at week six may still be limited in cutting or landing tasks at week ten. Documenting both the restored capacity and the residual deficit prevents premature clearance while still recognizing genuine progress. Attorneys evaluating claims involving lost wages or reduced earning capacity can point to dated progression data rather than relying solely on subjective reports or isolated range-of-motion numbers.

Serial Testing Within the Broader Medical-Legal Record

Serial functional performance testing does not replace imaging, neurologic examination, or medical evaluation. It supplies the longitudinal functional context that those other findings lack. When a dual-licensed clinician records movement screens, load-progression numbers, and work-simulation metrics consistently and reviews them under medical direction, the resulting file gives attorneys objective evidence that limitations are trauma-related and that recovery—or residual deficit—has been tracked over time. Patients gain a clear picture of their progress and remaining needs. Together, they support sound clinical care and courtroom-ready documentation for personal-injury cases in El Paso and the surrounding region.

Attorneys seeking longitudinal functional evidence for causation files, or patients who need objective tracking of recovery after a collision or workplace injury, can contact Injury Medical Clinic PA to discuss how serial testing integrates with comprehensive evaluation and care.

---

References

Cook, G., Burton, L., Hoogenboom, B. J., & Voight, M. (2014). Functional movement screening: The use of fundamental movements as an assessment of function—part 1. International Journal of Sports Physical Therapy, 9(3), 396–409. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4060319/

Cook, G., Burton, L., Hoogenboom, B. J., & Voight, M. (2014). Functional movement screening: The use of fundamental movements as an assessment of function—part 2. International Journal of Sports Physical Therapy, 9(4), 549–563. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4127517/

De Baets, L., Jaspers, E., Janssens, L., & Van Deun, S. (2018). Characteristics of functional capacity evaluations for individuals with non-specific low back pain: A scoping review. Journal of Occupational Rehabilitation, 28(3), 425–439. https://doi.org/10.1007/s10926-017-9733-y

Ferreira, M. B., Saraiva, F. A., Fonseca, T., Costa, R., Marinho, A., Oliveira, J. C., Carvalho, H. C., Rodrigues, P., & Ferreira, J. P. (2022). Clinical and functional impact of the 6-minute walk test in patients with chronic obstructive pulmonary disease: A systematic review and meta-analysis. Pulmonology, 28(6), 426–436. https://doi.org/10.1016/j.pulmoe.2021.11.005

Genovese, E., & Galper, J. S. (Eds.). (2009). Guide to the evaluation of functional ability: How to request, interpret, and apply functional capacity evaluations. American Medical Association.

Gross, D. P., & Battié, M. C. (2004). The prognostic value of functional capacity evaluation in patients with chronic low back pain: Part 1. Timely return to work. Spine, 29(8), 914–919. https://doi.org/10.1097/00007632-200404150-00019

Gross, D. P., & Battié, M. C. (2005). Functional capacity evaluation performance does not predict sustained return to work in claimants with chronic back pain. Journal of Occupational Rehabilitation, 15(3), 285–294. https://doi.org/10.1007/s10926-005-5937-7

Matheson, L. N. (2003). The functional capacity evaluation. In G. Andersson, S. Demeter, & G. Smith (Eds.), Disability evaluation (2nd ed.). American Medical Association.

Pransky, G., & Dempsey, P. G. (2004). Practical aspects of functional capacity evaluations. Journal of Occupational Rehabilitation, 14(3), 217–229. https://doi.org/10.1023/B:JOOR.0000022763.61656.b1

Reneman, M. F., & Dijkstra, P. U. (2003). Introduction to the special issue on functional capacity evaluations: From expert based to evidence based. Journal of Occupational Rehabilitation, 13(4), 203–206. https://doi.org/10.1023/A:1026242019607

Soer, R., van der Schans, C. P., Geertzen, J. H., Groothoff, J. W., Brouwer, S., Dijkstra, P. U., & Reneman, M. F. (2009). Normative values for a functional capacity evaluation. Archives of Physical Medicine and Rehabilitation, 90(10), 1785–1794. https://doi.org/10.1016/j.apmr.2009.05.008

Wind, H., Gouttebarge, V., Kuijer, P. P., & Frings-Dresen, M. H. (2005). Assessment of functional capacity of the musculoskeletal system in the context of work, daily living, and sport: A systematic review. Journal of Occupational Rehabilitation, 15(2), 253–272. https://doi.org/10.1007/s10926-005-1223-y