{ "id": "ep68h6e6t5", "slug": "dynamometry", "title": "Dynamometry", "updated": "2026-10-15", "topic_path": [ { "id": "life", "label": "Life and health", "api_url": "https://www.edgepedia.org/api/v1/topics/life" }, { "id": "life.health", "label": "Human health and medicine", "api_url": "https://www.edgepedia.org/api/v1/topics/life.health" }, { "id": "life.health.clinical", "label": "Clinical assessment and procedures", "api_url": "https://www.edgepedia.org/api/v1/topics/life.health.clinical" }, { "id": "life.health.clinical.clinical-diagnostics", "label": "Diagnosis and clinical assessment", "api_url": "https://www.edgepedia.org/api/v1/topics/life.health.clinical.clinical-diagnostics" }, { "id": "life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs", "label": "Physical examination and clinical signs", "api_url": "https://www.edgepedia.org/api/v1/topics/life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs" }, { "id": "life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs.physical-performance-and-strength-testing", "label": "Physical performance and strength testing", "api_url": "https://www.edgepedia.org/api/v1/topics/life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs.physical-performance-and-strength-testing" } ], "geo": [ { "id": "geo.nongeo.t1800.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs", "label": "Non-geographic · 1800 to 1945: Physical examination and clinical signs", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs", "path": [ { "id": "geo.nongeo", "label": "Non-geographic", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo" }, { "id": "geo.nongeo.t1800", "label": "Non-geographic · 1800 to 1945", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800" }, { "id": "geo.nongeo.t1800.life", "label": "Life and health", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.life" }, { "id": "geo.nongeo.t1800.life.health", "label": "Human health and medicine", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.life.health" }, { "id": "geo.nongeo.t1800.life.health.clinical", "label": "Clinical assessment and procedures", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.life.health.clinical" }, { "id": "geo.nongeo.t1800.life.health.clinical.clinical-diagnostics", "label": "Diagnosis and clinical assessment", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.life.health.clinical.clinical-diagnostics" }, { "id": "geo.nongeo.t1800.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs", "label": "Physical examination and clinical signs", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1800.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs" } ] }, { "id": "geo.nongeo.t1946.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs", "label": "Non-geographic · 1946 to 2000: Physical examination and clinical signs", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs", "path": [ { "id": "geo.nongeo", "label": "Non-geographic", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo" }, { "id": "geo.nongeo.t1946", "label": "Non-geographic · 1946 to 2000", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946" }, { "id": "geo.nongeo.t1946.life", "label": "Life and health", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.life" }, { "id": "geo.nongeo.t1946.life.health", "label": "Human health and medicine", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.life.health" }, { "id": "geo.nongeo.t1946.life.health.clinical", "label": "Clinical assessment and procedures", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.life.health.clinical" }, { "id": "geo.nongeo.t1946.life.health.clinical.clinical-diagnostics", "label": "Diagnosis and clinical assessment", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.life.health.clinical.clinical-diagnostics" }, { "id": "geo.nongeo.t1946.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs", "label": "Physical examination and clinical signs", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs" } ] } ], "excerpt": "Dynamometry is the quantitative measurement of the force or torque a muscle produces, using handheld or fixed devices to assess neuromuscular function and track rehabilitation progress.", "snippet": "Dynamometry is the quantitative measurement of the force or torque a muscle produces, using handheld or fixed devices to assess neuromuscular function and track rehabilitation progress.", "node": "life.health.clinical.clinical-diagnostics.physical-examination-and-clinical-signs.physical-performance-and-strength-testing", "markdown": "# Dynamometry\n\nDynamometry is the quantitative measurement of the force or torque a muscle produces, typically with a handheld load-cell device or a fixed isokinetic system, to assess neuromuscular function and track rehabilitation progress.[1](https://www.mdpi.com/1424-8220/24/16/5100) Handheld dynamometers are portable, low-cost instruments, whereas fixed dynamometry uses large force transducers considered the gold standard for muscle strength measurement but costing more than USD 50,000 and lacking portability.[2](https://www.mdpi.com/1424-8220/24/6/1861)\n\n| Key fact | Detail |\n|---|---|\n| Quantities measured | Peak force in newtons (N) or kilograms; torque in newton-meters (Nm); rate of force development in N/s or Nm/s[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722) • [4](https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0308956) |\n| Transduction | Sealed hydraulic systems (Jamar), load cells, strain gauges, force-sensitive resistors, springs (Smedley), and pneumatic bulbs (Martin vigorimeter)[1](https://www.mdpi.com/1424-8220/24/16/5100) • [5](https://pubmed.ncbi.nlm.nih.gov/32572369/) • [6](https://www.dovepress.com/two-methods-of-handgrip-strength-assessment-in-sarcopenia-evaluation-a-peer-reviewed-fulltext-article-CIA) |\n| Test modes | Make test (patient holds an isometric contraction 3–5 s) versus break test (assessor applies force to just overcome the patient)[7](https://www.sralab.org/rehabilitation-measures/hand-held-myometry-dynamometry) |\n| Reliability | Pooled handgrip ICC 0.92 (healthy), 0.95 (upper extremity conditions), 0.96 (neurologic conditions)[8](https://www.unboundmedicine.com/medline/citation/31730754/Measurement_Properties_of_the_Hand_Grip_Strength_Assessment._A_Systematic_Review_with_Meta-analysis) |\n| Sarcopenia cutoffs | EWGSOP2 low grip strength <27 kg (men) and <16 kg (women)[5](https://pubmed.ncbi.nlm.nih.gov/32572369/) |\n| Device comparability | Commercial dynamometers differ by up to 6.26 kg in systematic bias and cannot be used interchangeably[9](https://spcare.bmj.com/content/early/2025/04/01/spcare-2024-005245) • [10](https://www.elsevier.es/en-revista-endocrinologia-diabetes-nutricion-english-ed--413-articulo-hand-dynamometry-does-device-used-S2530018025000915) |\n\n## How it works\n\nThe primary output is peak force, the maximal voluntary contractile force of a muscle in a single contraction, typically reported in newtons; peak force tolerates modest sampling rates, with usable data at 100 Hz.[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722) Because force depends on where the device is placed along the limb, many protocols measure the lever arm and convert newtons to torque in newton-meters.[11](https://link.springer.com/article/10.1186/s12891-023-06400-2) This matters: hip extensors measure almost twice as strong as hip flexors in force units, a difference that is reduced when results are expressed as torque, since torque depends on the moment arm at each device placement.[12](https://constellation.uqac.ca/id/eprint/8347/1/1-s2.0-S2590109521000896-main.pdf)\n\nA second output is the rate of force development (RFD), calculated as the slope of the force-time curve, \\( \\mathrm{RFD} = \\Delta F / \\Delta t \\), within epochs from force onset such as 0–50 ms and 0–100 ms (early phase) and 100–150 ms and 100–200 ms (late phase), reported in newtons per second.[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722) When force is converted to torque, the analogous quantity is the rate of torque development, \\( \\Delta \\tau / \\Delta t \\) in Nm·s⁻¹.[4](https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0308956) For handgrip, earlier work also derived \\( F_{\\mathrm{final}} \\), rate of force loss, and work as the area under the force curve.[1](https://www.mdpi.com/1424-8220/24/16/5100)\n\nTransduction varies by device family. The Jamar and its variants use a sealed hydraulic system displaying force up to 200 pounds (90 kg) with five handle positions.[5](https://pubmed.ncbi.nlm.nih.gov/32572369/) Electronic dynamometers use a force-sensitive resistor whose impedance changes with grip force; strain-gauge devices such as the Chatillon CSD400C display force to the nearest 0.2 lb up to 512 N; spring-type (Smedley) devices are cheaper but load-cell instruments probably retain accuracy better over time.[1](https://www.mdpi.com/1424-8220/24/16/5100) • [13](https://www.fysiosupplies.nl/media/PDF/normative_values_for_isometric_muscle_force_measurements_obtained_with_hand-held_dynamometers.pdf) • [14](https://journals.lww.com/topicsingeriatricrehabilitation/fulltext/2002/12000/quantitative_testing_of_muscle_strength__issues.3.aspx) The pneumatic Martin vigorimeter instead measures pressure in a rubber bulb, in kilopascals.[6](https://www.dovepress.com/two-methods-of-handgrip-strength-assessment-in-sarcopenia-evaluation-a-peer-reviewed-fulltext-article-CIA)\n\n## How it is done\n\nFor handgrip, the American Society of Hand Therapists recommended in 1981 a seated position without armrests, erect spine, knees and elbows flexed at 90°, shoulders adducted, forearms in half pronation, wrists neutral, and a handle size matched to the hand.[1](https://www.mdpi.com/1424-8220/24/16/5100) The NHANES survey instead tests participants aged 6 and older standing, with the dynamometer adjusted so the second joint of the index finger sits at 90° on the handle; each hand is tested three times alternating hands with 60-second rests, the reported result is the sum of the largest reading from each hand, and effort is rated maximal only if the fist shakes slightly during the squeeze.[15](https://wwwn.cdc.gov/nchs/data/nhanes/public/2013/manuals/Muscle_Strength_2013.pdf)\n\nFor limb muscles, a standardized protocol uses gravity-neutralized positions, the dynamometer aligned perpendicular to the segment, rigid straps to control compensations, a submaximal practice contraction, three 10-second make trials with at least 30 seconds rest, and extra trials if the coefficient of variation between trials exceeds 10%.[11](https://link.springer.com/article/10.1186/s12891-023-06400-2) Make tests are generally preferred over break tests because forces are lower and spasticity does not influence the result; belts supplement stabilization when the tester is not strong enough.[14](https://journals.lww.com/topicsingeriatricrehabilitation/fulltext/2002/12000/quantitative_testing_of_muscle_strength__issues.3.aspx) Isokinetic testing requires aligning the dynamometer shaft with the joint axis, securing the limb, gravity correction, submaximal warm-up repetitions, and five maximal gravity-corrected repetitions with 30-second rests between velocities.[16](https://www.asep.org/asep/asep/Brown2.pdf) Across published handheld protocols, contraction duration varies from 3 to 7 seconds, rest from 10 seconds to 2 minutes, and trial number from 1 to 5, with verbal encouragement given in only 3 reviewed studies.[12](https://constellation.uqac.ca/id/eprint/8347/1/1-s2.0-S2590109521000896-main.pdf)\n\n## Origin\n\nAttempts to instrument muscle assessment date to the 18th century, using counterweights, spring balances, and pressure systems in fixed set-ups, with strain-gauge instrumentation following in the 20th century.[17](https://doi.org/10.1007/bf02519999) A hand-held dynamometer for evaluating voluntary muscle function was described by R.H.T. Edwards and M. Mcdonnell in [The Lancet](https://www.edgepedia.org/the-lancet) in 1974.[18](https://doi.org/10.1016/s0140-6736%2874%2990947-7) Reliability and validity work followed: Richard W. Bohannon published a single-session test-retest reliability study in Physical Therapy in 1986,[19](https://doi.org/10.1093/ptj/66.2.206) and S. John Sullivan and colleagues published a validity and reliability study of handheld dynamometry for isometric external rotator performance in the Journal of Orthopaedic and Sports Physical Therapy in 1988.[20](https://doi.org/10.2519/jospt.1988.10.6.213) Bohannon later traced the adoption of [hand-held dynamometry](https://www.edgepedia.org/hand-held-dynamometry) from 1900 to 2005 in Perceptual and Motor Skills (2006).[21](https://doi.org/10.2466/pms.103.1.3-4) Later reviews attribute the earliest hand-held devices and the isokinetic concept to mid-twentieth-century papers, but those attributions rest on secondary citations without full bibliographic detail, so they should be read with caution.[17](https://doi.org/10.1007/bf02519999)\n\n## Variants\n\nHandheld dynamometers come in compression type, where the user pushes against the device, and tension type, where force is measured through pulling via straps or cables.[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722) Belt-stabilized handheld dynamometry tethers the device to an immovable strap, removing the tester as the weak link; Jaqueline Martins and colleagues reported its reliability and validity for hip- and knee-strength tests in the Journal of Athletic Training in 2017,[22](https://doi.org/10.4085/1062-6050-52.6.04) and Richard W. Bohannon and colleagues examined its adequacy for knee extension strength in 2011.[23](https://doi.org/10.1519/jsc.0b013e3181e4f5ce) Fixed and isokinetic systems remain the criterion standard, with excellent intratrial and test-retest reliability (0.99–1.0) and about 1% coefficient of variation, but they lack portability, are costly, and require space and examiner training.[22](https://doi.org/10.4085/1062-6050-52.6.04) When assessment targets maximal performance, as in sports medicine, handheld assessment is insufficient and stationary isometric or isokinetic devices are necessary.[17](https://doi.org/10.1007/bf02519999)\n\n## Applications\n\nA meta-analysis of 25 studies with 1879 participants found pooled handgrip intraclass correlation coefficients of 0.92 (95% CI 0.88–0.94) in healthy participants, 0.95 (0.93–0.97) in upper extremity conditions, and 0.96 (0.94–0.97) in neurologic conditions.[8](https://www.unboundmedicine.com/medline/citation/31730754/Measurement_Properties_of_the_Hand_Grip_Strength_Assessment._A_Systematic_Review_with_Meta-analysis) For limb muscles, inter-rater ICCs across 17 muscle groups ranged from 0.888 to 0.989, good to excellent for 15 of 17 groups, with only ankle groups showing moderate reliability.[11](https://link.springer.com/article/10.1186/s12891-023-06400-2) Agreement with isokinetic dynamometry is the contested point: one meta-analysis found inter-device ICCs from 0.62 (ankle dorsiflexion) to 0.94 (hip adduction), with handheld limits of agreement of 33.59% for knee extension and 48.87% for ankle plantar flexion, versus under 15% for isokinetic testing of hip adduction and extension, knee flexion and extension, and ankle dorsiflexion.[24](https://pmc.ncbi.nlm.nih.gov/articles/PMC5651404/) In neuromuscular disease, handheld and fixed devices correlated at r = .76 to .90 across 12 muscle groups, with comparable results when testing is limited to muscle groups producing relatively low forces.[25](https://doi.org/10.2519/jospt.1994.19.2.100)\n\nDynamometry is the standard strength measure in sarcopenia and dynapenia screening. EWGSOP2 set probable sarcopenia cutoffs of <27 kg for men and <16 kg for women, derived from a T-score of −2.5 on British normative data; the Asian Working Group for Sarcopenia used <26 kg (men) and <18 kg (women) in its 2014 consensus, revised in 2019 to <28 kg (men) and <18 kg (women).[5](https://pubmed.ncbi.nlm.nih.gov/32572369/) • [1](https://www.mdpi.com/1424-8220/24/16/5100) A 2025 Delphi consensus aligned with AWGS and KWGS reached cutoffs of <28 kg (men) and <18 kg (women); the divergence from EWGSOP2 remains unresolved.[26](https://www.e-agmr.org/journal/view.php?number=1203) Normative grip strength peaks in early adulthood and declines from around age 50: Dodds and colleagues, studying 60,803 observations from 49,964 participants aged 4–90, reported a peak median male grip of 51 kg (ages 29–39) and 31 kg for females (ages 26–42).[5](https://pubmed.ncbi.nlm.nih.gov/32572369/) In hospitalized older adults, higher grip strength predicted prolonged survival with a hazard ratio of 0.92 (95% CI 0.88–0.97) by dynamometer and 0.96 (0.93–0.98) by vigorimeter, and the vigorimeter accommodates patients with arthritis, tremor, or severe weakness.[6](https://www.dovepress.com/two-methods-of-handgrip-strength-assessment-in-sarcopenia-evaluation-a-peer-reviewed-fulltext-article-CIA) In neuromuscular disease, quantified handheld testing revealed a strength loss of up to 20.4% in late-onset myotonic dystrophy type 1 while manual muscle testing suggested normal strength; myometry also detects 16–40% strength gains in tetraplegia that MMT misses.[12](https://constellation.uqac.ca/id/eprint/8347/1/1-s2.0-S2590109521000896-main.pdf) • [7](https://www.sralab.org/rehabilitation-measures/hand-held-myometry-dynamometry)\n\n## Limitations and alternatives\n\nThe tester is a significant error source in handheld setups: assessor strength, fatigue, and experience all add error, and tethering the device to something immovable is recommended to eliminate this effect.[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722) Strong groups such as knee extensors and hip flexors cannot be resisted in compression mode without strap or assistant stabilization.[12](https://constellation.uqac.ca/id/eprint/8347/1/1-s2.0-S2590109521000896-main.pdf) Break tests are less reliable and often underestimate strength because the evaluator cannot counteract the force, and they expose participants to a higher injury risk.[2](https://www.mdpi.com/1424-8220/24/6/1861) • [12](https://constellation.uqac.ca/id/eprint/8347/1/1-s2.0-S2590109521000896-main.pdf) Positioning error is large: a 10° change in knee flexion angle produced more than a 20% difference in isometric quadriceps strength.[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722) Devices sampling at low rates distort RFD: the MicroFET2 samples at 100 Hz, a fixed 20 N force-onset threshold can represent 20% of total force in a weak muscle, and manufacturer-recommended pre-tensioning obscures early-phase RFD.[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722) Sampling rates now span 10 Hz (EasyForce) to 1200 Hz (DynamoMax), with data-driven recommendations of at least 500 Hz for peak force and RFD.[3](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722)\n\nDevices also disagree with one another: the Jamar Plus+ recorded systematically higher values than the Jamar hydraulic, with biases of 4.8 kg in men and 6.26 kg in women,[9](https://spcare.bmj.com/content/early/2025/04/01/spcare-2024-005245) and comparisons of Dynx, Saehan, and Smedley devices with the Jamar found significant biases (Dynx overestimating by more than 2 kg, Smedley underestimating by almost 2 kg), leading to the conclusion that dynamometers cannot be used interchangeably.[10](https://www.elsevier.es/en-revista-endocrinologia-diabetes-nutricion-english-ed--413-articulo-hand-dynamometry-does-device-used-S2530018025000915) Handheld dynamometry cannot be used with muscle grades below 3/5 in spinal cord injury, and manual muscle testing, its nearest alternative, is insensitive at higher grades: testers could not discern 20–25% strength differences, and children with strength only 50% of normal were misjudged as normal.[7](https://www.sralab.org/rehabilitation-measures/hand-held-myometry-dynamometry) • [14](https://journals.lww.com/topicsingeriatricrehabilitation/fulltext/2002/12000/quantitative_testing_of_muscle_strength__issues.3.aspx) For geriatric practice, fixed and isokinetic setups are excluded as impractical because setup time is prohibitive and the machines are very difficult to move.[14](https://journals.lww.com/topicsingeriatricrehabilitation/fulltext/2002/12000/quantitative_testing_of_muscle_strength__issues.3.aspx)\n\n## References\n\n1. [Handgrip Strength in Health Applications: A Review of the Measurement Methodologies and Influencing Factors (Sensors 2024, 24, 5100)](https://www.mdpi.com/1424-8220/24/16/5100)\n2. [Variability between Different Hand-Held Dynamometers for Measuring Muscle Strength (Sensors 2024)](https://www.mdpi.com/1424-8220/24/6/1861)\n3. [Mastering the use of hand-held dynamometry in clinical practice (Archives of Physiotherapy)](https://www.archivesofphysiotherapy.com/index.php/aop/article/view/3722)\n4. [Handheld dynamometry: Validity and reliability of measuring hip joint rate of torque development and peak torque (PLOS One, 2024)](https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0308956)\n5. [Measurement and Interpretation of Handgrip Strength for Research on Sarcopenia and Osteoporosis](https://pubmed.ncbi.nlm.nih.gov/32572369/)\n6. [Handgrip Strength and Sarcopenia Assessment Using Two Methods: dynamometer and vigorimeter in hospitalized older adults (Clinical Interventions in Aging)](https://www.dovepress.com/two-methods-of-handgrip-strength-assessment-in-sarcopenia-evaluation-a-peer-reviewed-fulltext-article-CIA)\n7. [Hand Held Myometry / Dynamometry, RehabMeasures Database](https://www.sralab.org/rehabilitation-measures/hand-held-myometry-dynamometry)\n8. [Measurement Properties of the Hand Grip Strength Assessment: A Systematic Review With Meta-analysis (Arch Phys Med Rehabil, 2020)](https://www.unboundmedicine.com/medline/citation/31730754/Measurement_Properties_of_the_Hand_Grip_Strength_Assessment._A_Systematic_Review_with_Meta-analysis)\n9. [Handgrip strength assessment in geriatric populations: digital dynamometers comparative study (BMJ Supportive & Palliative Care, 2025)](https://spcare.bmj.com/content/early/2025/04/01/spcare-2024-005245)\n10. [Hand dynamometry: Does the device used for measurement matter? (Endocrinología, Diabetes y Nutrición, 2025)](https://www.elsevier.es/en-revista-endocrinologia-diabetes-nutricion-english-ed--413-articulo-hand-dynamometry-does-device-used-S2530018025000915)\n11. [Psychometric properties of a standardized protocol of muscle strength assessment by hand-held dynamometry in healthy adults: a reliability study (BMC Musculoskeletal Disorders, 2023)](https://link.springer.com/article/10.1186/s12891-023-06400-2)\n12. [What is Known About Muscle Strength Reference Values for Adults Measured by Hand-Held Dynamometry: A Scoping Review](https://constellation.uqac.ca/id/eprint/8347/1/1-s2.0-S2590109521000896-main.pdf)\n13. [Andrews, Thomas & Bohannon (1996): Normative values for isometric muscle force obtained with hand-held dynamometers, Phys Ther 76:248-259](https://www.fysiosupplies.nl/media/PDF/normative_values_for_isometric_muscle_force_measurements_obtained_with_hand-held_dynamometers.pdf)\n14. [Quantitative Testing of Muscle Strength: Issues and Practical Options for the Geriatric Population (Topics in Geriatric Rehabilitation, 2002)](https://journals.lww.com/topicsingeriatricrehabilitation/fulltext/2002/12000/quantitative_testing_of_muscle_strength__issues.3.aspx)\n15. [NHANES Muscle Strength Procedures Manual (CDC)](https://wwwn.cdc.gov/nchs/data/nhanes/public/2013/manuals/Muscle_Strength_2013.pdf)\n16. [Accurate Assessment of Muscular Strength and Power (Journal of Exercise Physiologyonline)](https://www.asep.org/asep/asep/Brown2.pdf)\n17. [Computer-assisted hand-held dynamometer (CAHNDY paper, with historical account)](https://doi.org/10.1007/bf02519999)\n18. [HAND-HELD DYNAMOMETER FOR EVALUATING VOLUNTARY-MUSCLE FUNCTION (The Lancet, 1974)](https://doi.org/10.1016/s0140-6736%2874%2990947-7)\n19. [Richard W. Bohannon (1986). Test-Retest Reliability of Hand-Held Dynamometry During a Single Session of Strength Assessment. Physical Therapy.](https://doi.org/10.1093/ptj/66.2.206)\n20. [S. John Sullivan and colleagues (1988). The Validity and Reliability of Hand-Held Dynamometry in Assessing Isometric External Rotator Performance. Journal of Orthopaedic and Sports Physical Therapy.](https://doi.org/10.2519/jospt.1988.10.6.213)\n21. [Richard W. Bohannon (2006). Hand-Held Dynamometry: Adoption 1900–2005. Perceptual and Motor Skills.](https://doi.org/10.2466/pms.103.1.3-4)\n22. [Jaqueline Martins and colleagues (2017). Reliability and Validity of the Belt-Stabilized Handheld Dynamometer in Hip- and Knee-Strength Tests. Journal of Athletic Training.](https://doi.org/10.4085/1062-6050-52.6.04)\n23. [Richard W Bohannon and colleagues (2011). Adequacy of Belt-Stabilized Testing of Knee Extension Strength. The Journal of Strength and Conditioning Research.](https://doi.org/10.1519/jsc.0b013e3181e4f5ce)\n24. [Absolute Reliability and Concurrent Validity of Hand Held Dynamometry and Isokinetic Dynamometry in the Hip, Knee and Ankle Joint: Systematic Review and Meta-analysis (Open Medicine, 2017)](https://pmc.ncbi.nlm.nih.gov/articles/PMC5651404/)\n25. [Comparison of a Hand-Held and Fixed Dynamometer in Measuring Strength of Patients With Neuromuscular Disease (Brinkmann, JOSPT 1994)](https://doi.org/10.2519/jospt.1994.19.2.100)\n26. [Standardized Measurement of Muscle Strength and Physical Performance for Sarcopenia: An Expert-Based Delphi Consensus (European Geriatric Medicine)](https://www.e-agmr.org/journal/view.php?number=1203)\n\n---\n*Topic: Encyclopedia › Life and health › Human health and medicine › Clinical assessment and procedures › Diagnosis and clinical assessment › Physical examination and clinical signs › Physical performance and strength testing*\n\n*Initially written Sep 29, 2026 · Reviewed: Sep 30, 2026 · Edited: Oct 15, 2026 · Last review: Sep 30, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n", "same_as": [], "url": "https://www.edgepedia.org/dynamometry", "markdown_url": "https://www.edgepedia.org/dynamometry.md", "license": { "name": "Edgepedia Community License 1.0", "url": "https://www.edgepedia.org/edgepedia/license", "summary": "Free with credit, commercial use included. AI training is open to everyone. For other uses, organizations over USD 100M in revenue or 100M monthly users license separately.", "spdx": "LicenseRef-Edgepedia-Community-1.0" }, "credit": "\"Dynamometry\", Edgepedia (EdgeChat), https://www.edgepedia.org/dynamometry. Edgepedia Community License 1.0.", "credit_md": "\"[Dynamometry](https://www.edgepedia.org/dynamometry)\", Edgepedia (EdgeChat), [https://www.edgepedia.org/dynamometry](https://www.edgepedia.org/dynamometry). [Edgepedia Community License 1.0](https://www.edgepedia.org/edgepedia/license).", "credit_html": "\"Dynamometry\", Edgepedia (EdgeChat), https://www.edgepedia.org/dynamometry. Edgepedia Community License 1.0.", "speakable": "Dynamometry is the quantitative measurement of the force or torque a muscle produces, using handheld or fixed devices to assess neuromuscular function and track rehabilitation progress." }