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Joseph Adam Zeni, PHD, PT

Department : Rehabilitation And Movement Sciences

Academic Title: Associate Professor

Office Address:


Degree Degree Source Year Awarded
BS Quinnipiac University 2001
MPT Quinnipiac University 2003
PHD, PT University of Delaware 2008
Title Authors Where and When
Falling risk in patients with end-stage knee osteoarthritis Aljehani MS, Crenshaw JR, Rubano JJ, Dellose SM, Zeni JA Jr Clinical Rheumatol. Jan;40(1):3-9 doi:10.1007/s10067-020-05165-6 (2021)
Movement Pattern Biofeedback Training After Total Knee Arthroplasty: Randomized Clinical Trial Protocol Bade MJ, Christensen JC, Zeni J, Christiansen CL, Dayton MR, Forster JE, Cheuy VA, Stevens-Lapsley JE Contemp Clin Trials. 2020 Mar 12;91:105973
Physical Therapist Management of Total Knee Arthroplasty. Jette DU, Hunter SJ, Burkett L, Langham B, Logerstedt D, Piuzzu N, Poirer N, Radach L, Ritter J, Scalzitti D, Stevens-Lapsley J, Tompkins J, Zeni J Physical Therapy. 100(9):1603-1631. doi:10.1093/ptj/pzaa099, (2020)
Gait mechanics are influenced by quadriceps strength, age, and sex after total knee arthroplasty Christensen JC, Capin JJ, Hinrichs LA, Aljehani M, Stevens-Lapsley JE, Zeni JA doi:10.1002/jor.24878, October 9, 2020
Self-reported and performance-based outcome measures after unilateral total knee arthroplasty Youn IH, Leutzinger T, Youm JH, Zeni JA, Knarr BA Front Sports Act Living Sep 25;2:569932 (2020)
The contralateral knee may not be a valid control for biomechanical outcomes after unilateral total knee arthroplasty Aljehani M, Madara K, Snyder-Mackler L, Christiansen C, Zeni J. Gait Posture. 2019 May;70:179-184, 2019
The effect of extension assist orthosis with pneumatic bladders on pain and function for patients with early knee osteoarthritis Madara K, Aljehani M, Pozzi F, Colonna E, Zeni J. The Annals of Translational Medicine; Oct;7(Supp 7):S247, 2019
Progressive rehabilitation after total hip arthroplasty: A pilot and feasibility study Madara K, Marmon A, Aljehani M, Hunter-Giordano A, Raisis L, Zeni J. International Journal Sports Physical Therapy. Jul;14(4):564-581, 2019
Biomechanical gait variable estimation using wearable sensors after unilateral total knee arthroplasty Youn, I, Youn J, Zeni J, Knarr B. Sensors. May 15;18(5) E1577, 2018
Altering cadence or vertical oscillation during running: effects of running related injury factors Adams D, Pozzi F, Willy R, Carrol A, Zeni J International Journal of Sports Physical Therapy. (4):633-642, 2018
Restoring physical function after total knee arthroplasty: a cross-sectional comparison with implications for rehabilitation Pozzi F, White D, Snyder-Mackler L, Zeni J. Physiotherapy Theory and Practice. Jun 7:1-12, 2018
Stiff knee gait may increase risk of second total knee arthroplasty Zeni J, Flowers P, Bade M, Cheuy V, Stevens-Lapsley J, Snyder-Mackler L. J Orthopaedic Research. Feb;37(2):397-402, 2018
The effect of surgical approach on gait mechanics after total hip arthroplasty Zeni J, Madara K, Witmer H, Gerhardt R, Rubano J. Journal of Electromyography and Kinesiology. Feb;38:28-33, 2018
Hip joint biomechanics in those with and without post-traumatic knee osteoarthritis after anterior cruciate ligament injury Wellsandt E, Zeni J, Axe M, Snyder-Mackler L. Clinical Biomechanics. Oct 2; 50:63-69, 2017
A six-week supervised exercise and educational intervention after total hip arthroplasty: A case series Pozzi F, Madara K, Zeni J. International Journal of Sports Physical Therapy. Apr;12(2):259-272, 2017
Physical function after total knee replacement: An observational study describing outcomes in a small group of women from China and the United States White DK, Li Z, Zhang Y, Marmon AR, Master H, Zeni J, Niu J, Jiang L, Zhang S, Lin J Archives of Physical Medicine and Rehabilitation. Jul 29. pii: S0003-9993(17)30493-8, 2017
Single-limb drop landing biomechanics in active individuals with and without a history of anterior cruciate ligament reconstruction: A total support analysis Pozzi F, Di Stasi S, Zeni J, Barrios JA Clinical Biomechanics. Feb 4;43:28-33, 2017
Influence of weight bearing visual feedback on movement symmetry during sit to stand task Abujaber S, Pozzi F, Zeni J. Clinical Biomechanics. Aug;47:110-116, 2017
Arthrofibrosis associated with total knee arthroplasty Cheuy V, Foran J, Paxton R, Bade M, Zeni J, Stevens-Lapsley J. J Arthroplasty. Aug;32(8):2604-2611, 2017
The effect of surgical approach on function and strength after total hip arthroplasty Zeni J, Madara K, Rubano J Delaware Medical Journal. 88(11):334-340, 2016
Lower leg compensatory strategies during performance of a step up and over task in patients six-months after total knee arthroplasty Pozzi F, Marmon A, Snyder-Mackler L, Zeni J Gait and Posture. Sep;49:41-6, 2016
The association of psychosocial factors with physical activity and function after total knee replacement: An exploratory study Dominick G, White D, Zeni J. Archives of Physical Medicine and Rehabilitation. Sep;97(9 Suppl):S218-25, 2016
Quadriceps strength asymmetry predicts loading asymmetry during sit-to-stand task in patients with unilateral total knee arthroplasty Alnahdi A, Zeni J, Snyder-Mackler Knee Surg Sports Traumatol Arthrosc. Aug;24(8):2587-94, 2016
Validity and Reliability of a Commercial Fitness Watch for Measuring Running Dynamics Adams D, Pozzi F, Carroll A, Rombach A, Zeni J JOSPT Jun;46(6):471-6, 2016
Design and conduct of clinical trials for rehabilitation in people with osteoarthritis: recommendations from a task force of the osteoarthritis research society international Fitzgerald K, Hinman R, Zeni J, Snyder-Mackler L, Bennell K Osteoarthritis and Cartilage. May;23(5):803-814, 2015
Sit-To-Stand Biomechanics Before and After Total Hip Arthroplasty Abujaber S, Rubano J, Marmon A, Pozzi F, Zeni J. The Journal of Arthroplasty. J Arthroplasty. Nov;30(11):2027-33. PMC 4640963, 2015
Change in knee contact force with a simulated change in body weight Knarr B, Zeni J, Higginson J Computer Methods in Biomechanics and Biomedical Engineering. 19(3): 320-323 PMC4567548, 2015
Relationship between biomechanical asymmetries during a step up and over task and stair climbing after total knee arthroplasty Pozzi F, Snyder-Mackler L, Zeni J Clinical Biomechanics. Jan;30(1):78-85. PMC4298478, 2015
Validity of the Nintendo Wii Balance Board to assess weight bearing asymmetry during sit-to-stand and return-to-sit task Abujaber S, Pozzi F, Marmon A, Gillispie G, Zeni J Clinical Biomechanics. Feb;41(2):676-82. PMC4385456, 2015
Relationship between physical impairments and movement patterns during gait in patients with end-stage hip osteoarthritis Zeni J, Pozzi F, Abujaber S, Miller L. Journal of Orthopaedic Research. Mar;33(3):382-9. PMC4346450, 2015
Sex differences in patients with different stages of knee osteoarthritis Logerstedt D, Zeni J, Snyder-Mackler L Archives of Physical Medicine and Rehabilitation. Dec;95(12):2376-81. PMC4254053, 2014
Relationship between strength, pain and different measures of functional ability in patients with end-stage hip osteoarthritis Zeni J, Abujaber S, Pozzi F, Raisis L. Arthritis Care and Research. Arthritis Care Res. 2014 Oct;66(10):1506-12. PMC4175298, 2014
Hip Abductor Strength Reliability and Association With Physical Function After Unilateral Total Knee Arthroplasty: A Cross-Sectional Study Alnahdi A, Zeni J, Snyder-Mackler L Physical Therapy. Aug 94(8): 1154-1162. PMC4118074, 2014
Sports participation following total hip arthroplasty: a review Meira E, Zeni J International Journal of Sports Physical Therapy. 9(6); 839-845. PMC4223292, 2014
The validity of plantarflexor strength measures obtained through hand-held dynamometry measures of force Marmon A, Pozzi F, Alnahdi A, Zeni J. Int J Sports Phys Ther. Dec;8(6):820-7. PMC3867075, 2013
Physical exercise after total knee arthroplasty: a systematic review of controlled trials Pozzi F, Snyder-Mackler L, Zeni J. Eur J Phys Rehab Med. Dec;49(6):877-92, 2013
Dynamic joint stiffness and co-contraction in subjects after total knee arthroplasty McGinnis K, Snyder-Mackler L, Zeni J. Clin Biomech. Feb;28(2):205-10. PMC3604158, 2013
Biofeedback to promote movement symmetry retraining after knee arthroplasty replacement: A feasibility study Zeni J, Flowers P, Abujaber S, Pozzi F, Snyder-Mackler L. JOSPT Oct;43(10): 715-726 doi:10.2519/jospt.2013.4657 PMC4072454, 2013
Perception and Presentation of Function in Patients with Unilateral Versus Bilateral Knee Osteoarthritis Marmon A, Zeni J, Snyder-Mackler L Arthritis Care Res. Mar;65(3):406-13. doi: 10.1002/acr.21825 PMC3537858, 2013
Reliability and Repeatability of the Portable EPS-Platform Digital Pressure Plate System Vallejo RB, Iglesias ME, Zeni JA, Thomas SJ J Am Podiatr Med Assoc, May-Jun;103(3):197-203, 2013
Do patients achieve normal gait patterns 3 years after total knee arthroplasty? Yoshida Y, Zeni J, Alnahdi A, Snyder-Mackler L JOSPT Dec;42(12):1039-49. PMC4287244 doi: 10.2519/jospt.2012.3763, 2012
Predicting Poor Physical Performance after Total Knee Arthroplasty Bade M, Stevens-Lapsley J, Zeni J, Snyder-Mackler L Journal of Orthopaedic Research. 30(11):1805-10 doi: 10.1002/jor.22140. PMC3417156, 2012
Muscle Impairments in Patients with Knee Osteoarthritis Alnadhi A, Zeni J, Snyder-Mackler L. Journal of Sports Health: A Multidisciplinary Approach. 4(4): 284-292. DOI: 10.1177/1941738112445726 PMC3435919, 2012
Comparison of electromyography and joint moment as indicators of co-contraction Knarr B, Zeni J, Higginson JS. Journal of Electromyography and Kinesiology. Aug;22(4):607-11 PMC3506260, 2012
Functional and Biomechanical Outcomes After Using Biofeedback for Retraining Symmetrical Movement Patterns After Total Knee Arthroplasty: A Case Report McClelland JA, Zeni, JA, Haley R, Snyder-Mackler L Journal of Orthopaedic and Sports Physical Therapy. 42(2):135-144. doi:10.2519/jospt.2012.3773 PMC3619425, 2012
Preoperative Predictors for Non-Copers to Pass Return to Sports Criteria After ACL Reconstruction Hartigan EH, Zeni J Jr, Di Stasi S, Axe MJ, Snyder-Mackler L. J Appl Biomech. Aug;28(4):366-73. PMC3596873, 2012
Management of a pelvic mass following a worn uncemented total hip arthroplasty Nazarian DG, Zeni J. J Arthroplasty. Feb;27(2):323, 2012
Gait after unilateral total knee arthroplasty: Frontal plan analysis Alnahdi A, Zeni J, Snyder-Mackler L. Journal of Orthopaedic Research. May;29(5):647-52. doi: 10.1002/jor.21323. PMID: 21184513. PMC3754839, 2011
Knee osteoarthritis affects the distribution of joint moments during gait Zeni J and Higginson, JS The Knee. Jun;18(3):156-9. doi:10.1016/j.knee.2010.04.003 PMC2970742, 2011
Measuring Functional Improvement after Total Knee Arthroplasty Requires both Performance-Based and Patient-Report Assessments: A Longitudinal Analysis of Outcomes Mizner R, Petterson S, Clements K, Zeni J, Irrgang J, Snyder-Mackler L Journal of Arthroplasty. Aug;26(5):728-37. PMC3008304, 2010
Clinical predictors of elective total joint replacement in persons with end-stage knee osteoarthritis Zeni J, Snyder-Mackler, L. BMC Muscloskeletal Disorders. 86(11): doi:10.1186/1471-2474-11-86; PMC287765, 2010
Pre-operative predictors of stair ascent and descent after total knee replacement Zeni J, Snyder-Mackler, L. Journal of Bone and Joint Surgery. 92: 1130-1136 doi:10.2106/JBJS.I.00299 PMC2859903, 2010
Gait parameters and stride-to-stride variability during familiarization to walking on a split-belt treadmill Zeni J and Higginson, JS. Clinical Biomechanics. 25(4): 383-386 doi:10.1016/j.clinbiomech.2009.11.002 PMC2847055, 2010
Most Patients Gain Weight in the Two Years After Total Knee Arthroplasty: Comparison to a Healthy Control Group Zeni J, Snyder-Mackler, L. Osteoarthritis and Cartilage. 18(4): 510-514 doi:10.1016/j.joca.2009.12.005; PMC2846226, 2010
Alterations in quadriceps and hamstrings coordination in persons with medial compartment knee osteoarthritis Zeni J, Rudolph K, Higginson JS. Journal of Electromyography and Kinesiology. Feb;20(1):148-54. PMC2827305, 2010
Early Post-operative function predicts long term outcomes after total knee replacement: The importance of contralateral limb strength Zeni J, Snyder-Mackler, L. Physical Therapy Journal. 80(1): 43-54 doi:10.2522/ptj.20090089. (Rose Excellence in Research Award Paper) PMC2802824, 2010
Clinical outcomes following simultaneous bilateral knee replacement: A two year prospective study Zeni J, Snyder-Mackler, L. Journal of Arthroplasty. 25 (4), 541-546 doi:10.1016/j.arth.2009.02.016 PMC2876215, 2009
Dynamic knee joint stiffness in persons with a progressive increase in severity of knee osteoarthritis. Zeni J and Higginson, JS. Clinical Biomechanics. 24(4): 366-71. doi:10.1016/j.clinbiomech.2009.01.005 PMC2696188, 2009
Differences in gait parameters between healthy subjects and persons with moderate and severe knee osteoarthritis: A result of altered walking speed? Zeni J and Higginson, JS. Clinical Biomechanics 24(4): 372-8. doi:10.1016/j.clinbiomech.2009.02.001 PMC2715920, 2009
Two simple methods for determining gait events during treadmill and overground walking using kinematic data Zeni J, Richards JG, Higginson JS Gait Posture 27(4): 710-4. PMC2384115, 2008
Award Year
Young Investigator Award from the Biomechanics Research Special Interest Group of the APTA Section on Research 2018
Eugene Michels Young Investigator Award from the APTA 2017
Outstanding Doctoral Student Advising and Mentoring Award from the University of Delaware 2015
Excellence in Teaching Award from the College of Health Science 2014
Nominee, Excellence in Undergraduate Academic Advising and Mentoring Award 2013
Medical Honoree, Delaware Arthritis Foundation – Wilmington Arthritis Walk 2012
Comprehensive Opportunities in Rehabilitation Research Training (CORRT) Scholar 2011
Rose Excellence in Research Award from the APTA 2010
New Investigator Research Award (Finalist) – Orthopaedic Research Society 2009
Research Interests
The themes of identifying risk factors, prevention and management underscore my research interests, merging physical therapy and public health principles. For example, the identification of psychosocial risk factors may influence PT screening and management, as well as potentially shape policy related to the care of these patients/clients. In addition, through the collection of demographic data, these projects examine the presence of disparities in specific patient/client populations as well as educational settings.
The goal of my research is to improve functional, biomechanical, and quality of life outcomes for individuals with hip and knee osteoarthritis (OA). In particular, my research focuses on two primary areas: 1) normalizing movement patterns before and after joint arthroplasty to prevent long-term disability from OA progression and 2) improving participation and physical activity after arthroplasty, which are deficits that do not resolve with surgical intervention alone. I am interested in developing, testing and implementing low-cost and clinically-viable methods of evaluation and intervention for this population. I strongly believe that individualized assessments and interventions are important, but these methods must be accessible to the clinical community outside of laboratory and academic environments.
Description of demographic and psychosocial characteristics of patients with orofacial pain in a specialized orofacial pain clinic. (Co-investigator)
Current Projects: Outcomes after Total Knee Arthroplasty - We are investigating the time course of recovery for clinical and functional outcomes after total knee arthroplasty (TKA). We will use this large prospective dataset to identify pre-operative predictors of recovery, measure the rate of recovery after surgery, and identify risk factors for poor outcomes.
Current Projects: Movement Pattern Biofeedback Training After Total Knee Arthroplasty (NCT03325062) - This research study explores the effects of movement pattern training using real-time biofeedback insoles after total knee arthroplasty. The purpose of this research study is to determine if the addition of a novel movement pattern training program (MOVE) to contemporary progressive rehabilitation leads to improved movement quality and physical function compared to contemporary progressive rehabilitation (CONTROL) alone. This intervention is being conducted at the University of Colorado Denver. Dr. Zeni is a co-investigator on this project and will specifically be looking to see if normalizing movement patterns improves long-term outcomes and prevents arthritis from progressing to other joints.
Research Grants
Title Sponsor Effective Dates Role
Movement Pattern Training after Total Knee Arthroplasty National Institutes of Health (NIA) 9/15/2017-4/30/2022 Co-Investigator
Movement Pattern Training after Total Knee Arthroplasty National Institutes of Health 10/1/15-9/30/17 Co-Investigator
Criteria for safe return-to-drive after total knee replacement General University Grant from University of Delaware 6/1/16-5/31/18 Principal Investigator
Time Course of Contralateral Arthritis Progression after Knee Replacement Pilot Project Grant from NIH 6/16/16-6/15/17 Principal Investigator
Improving Rehabilitation after Total Hip Arthroplasty Pilot Project Grant from 5P30GM103333 COBRE III 6/1/15-5/31/16 Principal Investigator
Bracing to improve biomechanics and function in patients with knee osteoarthritis Ongoing Care Solutions 3/1/15-2/28/16 Principal Investigator
Developing an accelerometry-based algorithm to predict running injury and improve running training Internal award from the National Science Foundation I-Corps Grant directed by the Horn Program in Entrepreneurship 10/1/15 Academic Lead
Developing a low-cost force sensor for clinical use University of Delaware First Step Grand Challenge Seed Grant 10/1/15 Mentor
Research Experience for Undergraduates (REU) University of Delaware Research Foundation (UDRF) 9/15/14-8/31/15 Principal Investigator
Functional and biomechanical impairments in patients undergoing total hip arthroplasty: A longitudinal analysis University of Delaware Research Foundation Grant (UDRF) 6/1/13-5/31/15 Principal Investigator
Maximizing Functional and Biomechanical Outcomes after Total Knee Arthroplasty (Scholar): K12 HD055931 9/1/11-8/31/15 Principal Investigator
Comparison of Methods of Viscosupplementation on Function and Pain in Patients with Knee Osteoarthritis Pilot Project Grant from NIH P20-RR16458 1/1/10-12/31/10 Principal Investigator
Joint loading and the progression of osteoarthritis ARRA Supplemental Grant to NIH P20-RR16458-S1 9/1/09 Co-Investigator
Title Details
Joseph Zeni, Jr. PT, PhD   2019 Joseph Zeni, Jr. PT, PhD received his Baccalaureate of Science and his Master of Physical Therapy degrees at Quinnipiac University. After working for several years in inpatient and outpatient orthopaedic settings, Dr. Zeni furthered his graduate work by completing his PhD at the University of Delaware in the Biomechanics and Movement Science Program. He subsequently received a post-doctoral fellowship to study Clinical Outcomes at the University of Delaware in the Department of Physical Therapy. Dr. Zeni’s current research interests pertain to enhancing the quality of life and improving the value of rehabilitation for patients after total joint replacement. Specifically, Dr. Zeni is interested in developing clinical interventions that improve physical activity and recreational participation after surgery. He is also interested in using activity monitors to measure biomechanics outside of the laboratory setting and to test the feasibility and effectiveness of tele-rehabilitation for patients with musculoskeletal impairments. Dr. Zeni is an Associate Professor in the DPT North program and currently teaches Anatomy, Imaging, and Research courses.

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