Publications

2022

Pimentel RE, Feldman JN, Lewek MD, Franz JR. Quantifying mechanical and metabolic interdependence between speed and propulsive force during walking. Front Sports Act Living. 2022 Sep 9;4:942498.

Lee IC, Liu M, Lewek MD, Hu X, Filer WG, Huang H.Toward Safe Wearer-Prosthesis Interaction: Evaluation of Gait Stability and Human Compensation Strategy Under Faults in Robotic Transfemoral Prostheses.  IEEE Trans Neural Syst Rehabil Eng. 2022;30:2773-2782.

Rowland DM, Lewek MD. Linking gait mechanics with perceived quality of life and participation after stroke. PLoS One. 2022 Sep 21;17(9):e0274511.

Parker CJ, Guerin H, Buchanan B, Lewek MD. Targeted verbal cues can immediately alter gait following stroke. Top Stroke Rehabil. 2022 Jul;29(5):382-391

2021

Lehr NL, Clark WH, Lewek MD, Franz JR. The effects of triceps surae muscle stimulation on localized Achilles subtendon tissue displacements. J Exp Biol. 2021 Aug 1;224(15)

McCain EM, Berno ME, Libera TL, Lewek MD, Sawicki GS, Saul KR. Reduced joint motion supersedes asymmetry in explaining increased metabolic demand during walking with mechanical restriction. J Biomech. 2021 Jul 9;126:110621.

Conway KA, Crudup KL, Lewek MD, Franz JR. Effects of Horizontal Impeding Force Gait Training on Older Adult Push-Off Intensity. Med Sci Sports Exerc. 2021 Mar 1;53(3):574-580.

McCain EM, Libera TL, Berno ME, Sawicki GS, Saul KR, Lewek MD. Isolating the energetic and mechanical consequences of imposed reductions in ankle and knee flexion during gait. J Neuroeng Rehabil. 2021 Feb 1;18(1):21.

Herrero L, Franz JR, Lewek MD. Gradually learning to increase gait propulsion in young unimpaired adults. Hum Mov Sci. 2021 Feb;75:102745.

2020

Awad LN, Lewek MD, Kesar TM, Franz JR, Bowden MG. These legs were made for propulsion: advancing the diagnosis and treatment of post-stroke propulsion deficits. J Neuroeng Rehabil. 2020 Oct 21;17(1):139.

Chawla G, Hoppe M, Browner N, Lewek MD. Individuals With Parkinson’s Disease Retain Spatiotemporal Gait Control With Music and Metronome Cues. Motor Control. 2020 Oct 19:1-11.

Lee IC, Pacheco MM, Lewek MD, Huang H. Perceiving amputee gait from biological motion: kinematics cues and effect of experience level. Sci Rep. 2020 Oct 13;10(1):17093.

Hoppe M, Chawla G, Browner NM, Lewek MD. The Effects of Metronome Frequency Differentially Affects Gait on a Treadmill and Overground in People with Parkinson’s Disease. Gait Posture 2020 Jun;79:41-45.

Sherron MA, Stephenson SA, Browner NM, Lewek MD. Targeted Rhythmic Auditory Cueing During Treadmill and Overground Gait for Individuals with Parkinson disease: A Case Series J Neurol Phys Ther. 2020 Oct;44(4):268-274.

Ryan HP, Husted C, Lewek MD. Improving Spatiotemporal Gait Asymmetry has Limited Functional Benefit for Individuals Post-Stroke. J Neurol Phys Ther. 2020 Jul;44(3):197-204.

Harkey MS, Blackburn JT, Hackney AC, Lewek MD, Schmitz RJ, Pietrosimone B. Sex-Specific Associations between Cartilage Structure and Metabolism at Rest and Acutely Following Walking and Drop-Landing. Cartilage. 2020 Sep 19:1947603520959386.

Fylstra BL, Lee IC, Huang S, Brandt A, Lewek MD, Huang HH. Human-prosthesis coordination: A preliminary study exploring coordination with a powered ankle-foot prosthesis. Clin Biomech (Bristol, Avon). 2020 Sep 7;80:105171.

2019

Pieper NL, Lewek MD, Franz JR. Can shank acceleration provide a clinically feasible surrogate for individual limb propulsion during walking? J Biomech. 2019 Oct 23:109449.

Brandt A, Riddick W, Stallrich J, Lewek MD, Huang HH. Effects of Extended Powered Knee Prosthesis Stance Time via Visual Feedback on Gait Symmetry of Individuals with Unilateral Amputation: A Preliminary Study. J Neuroeng Rehabil. 2019 Sep 11;16(1):112.

Levin I, Lewek MD, Giuliani C, Faldowski R, Thorpe DE. Test-retest reliability and minimal detectable change for measures of balance and gait in adults with cerebral palsy. Gait Posture. 2019 Jul;72:96-101

Lewek MD, Sawicki GS. Trailing Limb Angle is a Surrogate for Propulsive Limb Forces During Walking Post-Stroke. Clin Biomech. 2019 Jul;67:115-118.

McCain EM, Dick TJM, Giest TN, Nuckols RW, Lewek MD, Saul KR, Sawicki GS. Mechanics and Energetics of Post-Stroke Walking Aided by a Powered Ankle Exoskeleton with Speed-Adaptive Myoelectric Control. J Neuroeng Rehabil. 2019 May 15;16(1):57.

Lewek MD, Sykes R. Minimal Detectable Change For Gait Speed Depends On Baseline Speed In Individuals With Chronic Stroke. J Neurol Phys Ther. 2019 Apr;43(2):122-127.

2018

Penke K, Scott K, Sinsky Y, Lewek MD. Propulsive Forces Applied to the Body’s Center of Mass Affect Metabolic Energetics Post-Stroke. Arch Phys Med Rehabil. 2018 Nov 2. pii: S0003-9993(18)31445-X.

Lewek MD, Raiti C, Doty A. The Presence of a Paretic Propulsion Reserve during Gait in Individuals Following Stroke. Neurorehabil Neural Repair. 2018 Dec;32(12):1011-1019.

Harkey MS, Blackburn JT, Hackney AC, Lewek MD, Schmitz RJ, Pietrosimone B. Acute Serum Cartilage Biomarker Response following Walking and Drop-Landing. Med Sci Sports Exerc. 2018 Jul;50(7):1465-1471

Harkey MS, Blackburn JT, Hackney AC, Lewek MD, Schmitz RJ, Nissman D, Pietrosimone B. Comprehensively Assessing the Acute Femoral Cartilage Response and Recovery after Walking and Drop-Landing: An Ultrasonographic Study. Ultrasound Med Biol. 2018 Feb;44(2):311-320.

Lewek MD, Braun CH, Wutzke C, Giuliani C. The Role of Movement Errors in Modifying Spatiotemporal Gait Asymmetry Post-Stroke: A Randomized Controlled Trial. Clin Rehab 2018 Feb;32(2):161-172.

2017

Zukowski LA, Martin JM, Scronce G, Lewek MD, Plummer P. The influence of cognitive load on metabolic cost of transport during overground walking in healthy, young adults. Eur J Appl Physiol. 2017 Apr;117(4):679-686.

Levin I, Lewek MD, Feasel J, Thorpe DE. Gait Training with Visual Feedback to Reduce Gait Asymmetry in Adults with Cerebral Palsy. Pediatric Phys Ther. 2017 Apr;29(2):138-145.

Zhang F, Boehlen P, Lewek MD, Huang H. Prediction of Intrinsically Caused Tripping Events in Individuals with Stroke. Trans Neur Sys Rehab Eng. 2017 Aug;25(8):1202-1210.

2016

Middleton A, Braun CH, Lewek MD, Fritz S. Balance impairment limits ability to increase walking speed in individuals with chronic stroke. Disabil Rehabil. 2016 Mar 13:1-6.

Pamukoff DN, Lewek MD, Blackburn JT.  Greater vertical loading rate in obese compared to normal weight young adults.  Clin Biomech (Bristol, Avon). 2016 Mar;33:61-5.

Pamukoff DN, Pietrosimone B, Lewek MD, Ryan ED, Weinhold PS, Lee DR, Blackburn JT. Whole-Body and Local Muscle Vibration Immediately Improve Quadriceps Function in Individuals With Anterior Cruciate Ligament Reconstruction. Arch Phys Med Rehabil. 2016 Feb 8.

Pamukoff DN, Pietrosimone B, Ryan ED, Weinhold PS, Lewek MD, Lee DR, Blackburn JT. Immediate effect of vibratory stimuli on quadriceps function in healthy adults. Muscle Nerve. 2016 Feb 13.

2015

Burpee JL, Lewek MD. Biomechanical gait characteristics of naturally occurring unsuccessful foot clearance during swing in individuals with chronic stroke. Clin Biomech (Bristol, Avon). 2015 Dec;30(10):1102-7.

Wutzke CJ, Faldowski RA, Lewek MD. Individuals poststroke do not perceive their spatiotemporal gait asymmetries as abnormal.  Phys Ther. 2015 Sep;95(9):1244-53.

Takahashi KZ, Lewek MD, Sawicki GS.A neuromechanics-based powered ankle exoskeleton to assist walking post-stroke: a feasibility study. J Neuroeng Rehabil. 2015 Feb;12(1):23.

Farris DJ, Hampton A, Lewek MD, Sawicki GS. Revisiting the mechanics and energetics of walking in individuals with chronic hemiparesis following stroke: from individual limbs to lower limb joints. J Neuroeng Rehabil. 2015 Feb;12(1):24.

Goss DL, Lewek M, Yu B, Ware WB, Teyhen DS, Gross MT. Lower extremity biomechanics and self-reported foot-strike patterns among runners in traditional and minimalist shoes. J Athl Train. 2015 Jun;50(6):603-11.

Mahon CE, Farris DJ, Sawicki GS, Lewek MD. Individual limb mechanical analysis of gait after stroke. J Biomech. 2015 Apr 13;48(6):984-9

Norcross MF, Shultz SJ, Weinhold PS, Lewek MD, Padua DA, Blackburn JT. The influences of sex and posture on joint energetics during drop landings.    Scand J Med Sci Sports. 2015 Apr;25(2):e166-75.

2014

Murray M, Hardee A, Goldberg RL, Lewek MD. Loading and knee flexion: Less does not equal more. J Electromyogr Kinesiol. 2014 Feb;24(1):172-7.

Lewek MD, Bradley CE, Wutzke CJ, Zinder SM. The Relationship Between Spatiotemporal Gait Asymmetry and Balance in Individuals With Chronic Stroke.  J Appl Biomech. 2014 Feb;30(1):31-6.

2013

Struminger AH, Lewek MD, Goto S, Hibberd E, Blackburn JT. Comparison of gluteal and hamstring activation during five commonly used plyometric exercises.  Clin Biomech (Bristol, Avon). 2013 Aug;28(7):783-9.

Norcross MF, Lewek MD, Padua DA, Shultz SJ, Weinhold PS, Blackburn JT. Lower extremity energy absorption and biomechanics during landing. Part I: Sagittal plane energy analyses.  Journal of Athletic Training 2013 Nov-Dec;48(6):748-56.

Norcross MF, Lewek MD, Padua DA, Shultz SJ, Weinhold PS, Blackburn JT. Lower extremity energy absorption and biomechanics during landing. Part II: Frontal plane energy analyses and inter-planar relationships. Journal of Athletic Training 2013 Nov-Dec;48(6):757-63.

Wutzke CJ, Mercer VS, Lewek MD. The influence of lower extremity sensory function on locomotor adaptation following stroke: A review.  Topics in Stroke Rehabilitation 2013 May-Jun; 20(3):233-40.

2012

Wutzke CJ, Sawicki GS, Lewek MD. The influence of a unilateral fixed ankle on metabolic and mechanical demands during walking in unimpaired young adults. Journal of Biomechanics 2012 Sept 21; 45(14):2405-10.

Rhea CK, Wutzke CJ, Lewek MD. Gait dynamics following variable and constant speed gait training in individuals with chronic stroke.  Gait Posture 2012 Jun;36(2):332-4.

Lewek MD, Feasel J, Wentz E, Brooks Jr FP, Whitton MC.  The use of visual and proprioceptive feedback to improve gait speed and spatiotemporal symmetry following chronic stroke – a case series.  Physical Therapy Journal 2012 May;92(5):748-56.

Lewek MD, Osborn AJ, Wutzke C.  The Influence of Mechanically and Physiologically Imposed Stiff Knee Gait Patterns on the Energy Cost of Walking.  Archives of Physical Medicine and Rehabilitation 2012 Jan;93(1):123-8.

Macrum EC, Bell DR, Boling MC, Lewek MD, Padua DA.  Limiting Ankle Dorsiflexion Range of Motion Alters Lower Extremity Kinematics and Muscle Activation Patterns during a Squat. Journal of Sport Rehabilitation 2012 May;21(2):144-50.

2011

Thompson CK, Lewek MD, Jayaraman A, Hornby TG. Central Excitability Contributes to Supramaximal Volitional Contractions in Human Incomplete Spinal Cord Injury. J Physiol. 2011 Aug; 589(Pt 15):3739-52

Lewek MD, Randall EP.  Reliability of Spatiotemporal Asymmetry During Overground Walking for Individuals Following Chronic Stroke.  Journal of Neurologic Physical Therapy 2011; 35(3):116-121.

Feasel J, Whitton MC, Kassler L, Brooks Jr FP, Lewek MD.  The Integrated Virtual Environment Rehabilitation Treadmill System. IEEE Trans Neural Syst Rehabil Eng. 2011; 19(3):290-7.

Segal RL, Lewek MD, McCulloch K, Mercer VS. The Necessity for Effective Interaction between Basic Scientists and Rehabilitation Clinicians.  Cells Tissues Organs. 2011; 193(5):290-7.

Lewek MD. The Influence of Body Weight Support on Ankle Mechanics During Treadmill Walking. Journal of Biomechanics 2011 Jan; 44(1):128-133.

2010

Lewek MD, Breslin R, Hlad L, Lanton A, St John J. Non-paretic quadriceps activity influences paretic quadriceps activity post-stroke.  Clin Neurophysiol. 2010 Nov; 121(11):1962-1967.

Lewek MD, Poole R, Johnson J, Halawa O, Huang X.  Arm Swing Magnitude and Asymmetry During Gait in the Early Stages of Parkinson’s Disease.  Gait & Posture 2010  Feb 31(2): 256-260.

2009

Lewek MD.  The value of overground gait training for improving locomotion post-stroke.  Journal of Neurologic Physical Therapy 2009  Dec 33(4):187-188.

Cruz TH, Lewek MD, Dhaher YY.  Biomechanical impairments and gait adaptations post-stroke: multi-factorial associations.  Journal of Biomechanics 2009 Aug 7;42(11):1673-7.

Lewek MD, Cruz TH, Moore JL, Roth HR, Dhaher YY, Hornby TG. Allowing intralimb kinematic variability during locomotor training poststroke improves kinematic consistency: a subgroup analysis from a randomized clinical trial.  Phys Ther. 2009 Aug;89(8):829-39.

Courtney CA, Lewek MD, Witte PO, Chmell SJ, Hornby TG.  Heightened flexor withdrawal responses in subjects with knee osteoarthritis. J Pain. 2009 Dec; 10(12):1242-9.

Hornby TG, Lewek MD, Thompson CK, Heitz R.  Repeated maximal volitional effort contractions in human spinal cord injury: Initial torque increases and reduced fatigue.  Neurorehabil Neural Repair. 2009 Nov; 23(9):928-38.

2007

Lewek MD, Hornby TG, Dhaher YY, Schmit BD.  Prolonged quadriceps activity following imposed hip extension: A neurophysiological mechanism for stiff-knee gait?  Journal of Neurophysiology 2007: 98(6) 3153-62.

Rudolph KS, Schmitt LC, Lewek MD. Age-related changes in strength, joint laxity and walking patterns: Are they related to knee osteoarthritis?  Physical Therapy 2007; 87(11) 1422-32.

Ramsey DK, Snyder-Mackler L, Lewek MD, Newcomb W, Rudolph KS. Effect of anatomical realignment on muscle function during gait in patients with medial compartment knee osteoarthritis.  Arthritis Care & Research 2007:57(3):389-97.

2006

Lewek MD, Schmit BD, Hornby TG, Dhaher Y.  Hip joint position modulates volitional knee extensor muscle activity after stroke.  Muscle and Nerve.  2006: 34(6) 767-74.

Lewek MD, Scholz J, Rudolph KS, Snyder-Mackler L.  Stride-to-stride variability of knee motion in patients with knee osteoarthritis. Gait & Posture. 2006: 23(4) 505-11.

2005

Lewek MD, Ramsey D, Snyder-Mackler L, Rudolph KS.  Knee stabilization in patients with medial knee osteoarthritis.  Arthritis & Rheumatism 2005; 52(9) 2845-53.

2004

Risberg MA, Lewek MD, Snyder-Mackler L.  Evidence for ACL rehabilitation: How much and what type?  Physical Therapy in Sport. 2004: 5(3) 125-45.

Lewek MD, Rudolph KS, Snyder-Mackler L. Control of frontal plane knee laxity during gait in patients with medial compartment knee osteoarthritis.  Osteoarthritis and Cartilage 2004: 12(9):745-51.

Lewek MD, Rudolph KS, Snyder-Mackler L.  The incidence of activation failure in the quadriceps femoris muscle in patients with symptomatic knee osteoarthritis.  Journal of Orthopedic Research. 2004: 22(1) 110-115.

2003

LaStayo PC, Woolf J, Lewek MD, Snyder-Mackler L, Reich T, Lindstedt SL.  Eccentric muscle contractions:  Their contribution to injury, prevention, rehabilitation and sport.  Journal of Orthopedic and Sports Physical Therapy. 2003: 33(10) 557-571.

Lewek MD, Chmielewski TL, Risberg M, Snyder-Mackler L.  Dynamic knee stability in the ACL deficient knee.  Exercise and Sport Science Reviews. 2003: 31(4)195-200.

2002

Lewek MD, Rudolph KS, Axe MJ, Snyder-Mackler L. The effect of insufficient quadriceps strength on gait after anterior cruciate ligament reconstruction. Clinical Biomechanics 2002: 17(1) 56-63.

Williams GN, Higgins MJ, Lewek M.  Aging skeletal muscle: physiologic changes and the effects of training.  Physical Therapy.  2002: 82 (1) 62-68.

2001

Lewek MD, Stevens J, Snyder-Mackler L. The use of electrical stimulation to increase quadriceps femoris muscle strength in an elderly patient following a total knee arthroplasty. Physical Therapy 2001: 81 (9) 1565-1571.