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    Chris Powers, BA, MS, PhD

    TitleProfessor
    SchoolHerman Ostrow School of Dentistry of USC
    DepartmentBiokinesiology and Physical Therapy
    AddressCHP 155
    Health Sciences Campus
    Los Angeles California 90089-9006
    Phone+1 323 442 1928
    vCardDownload vCard

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      Dr. Powers' research and teaching interests relate to the biomechanical aspects of human movement. More specifically, his research focuses on how altered kinematics, kinetics, and muscular actions contribute to lower extremity injury. He is particularly interested in the pathomechanics underlying knee and patellofemoral joint dysfunction. He is currently the Co-Director of the Musculoskeletal Biomechanics Research Laboratory and the Director of the Program in Biokinesiology at USC.


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      Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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      1. Pollard CD, Sigward SM, Powers C. ACL Injury Prevention Training Results in Modification of Hip and Knee Mechanics During a Drop-Landing Task. Orthop J Sports Med. 2017 Sep; 5(9):2325967117726267. PMID: 28959697.
        View in: PubMed
      2. Tsai LC, Ko YA, Hammond KE, Xerogeanes JW, Warren GL, Powers C. Increasing hip and knee flexion during a drop-jump task reduces tibiofemoral shear and compressive forces: implications for ACL injury prevention training. J Sports Sci. 2017 Dec; 35(24):2405-2411. PMID: 28006992.
        View in: PubMed
      3. Yin L, Liao TC, Yang L, Powers C. Does Patella Tendon Tenodesis Improve Tibial Tubercle Distalization in Treating Patella Alta? A Computational Study. Clin Orthop Relat Res. 2016 Nov; 474(11):2451-2461. PMID: 27577067.
        View in: PubMed
      4. Teng HL, Powers C. Hip-Extensor Strength, Trunk Posture, and Use of the Knee-Extensor Muscles During Running. J Athl Train. 2016 Jul; 51(7):519-24. PMID: 27513169.
        View in: PubMed
      5. Selkowitz DM, Beneck GJ, Powers C. Comparison of Electromyographic Activity of the Superior and Inferior Portions of the Gluteus Maximus Muscle During Common Therapeutic Exercises. J Orthop Sports Phys Ther. 2016 Sep; 46(9):794-9. PMID: 27494053.
        View in: PubMed
      6. Crossley KM, Stefanik JJ, Selfe J, Collins NJ, Davis IS, Powers C, McConnell J, Vicenzino B, Bazett-Jones DM, Esculier JF, Morrissey D, Callaghan MJ. 2016 Patellofemoral pain consensus statement from the 4th International Patellofemoral Pain Research Retreat, Manchester. Part 1: Terminology, definitions, clinical examination, natural history, patellofemoral osteoarthritis and patient-reported outcome measures. Br J Sports Med. 2016 Jul; 50(14):839-43. PMID: 27343241; PMCID: PMC4975817.
      7. Fisher BE, Southam AC, Kuo YL, Lee YY, Powers C. Evidence of altered corticomotor excitability following targeted activation of gluteus maximus training in healthy individuals. Neuroreport. 2016 Apr 13; 27(6):415-21. PMID: 26981714.
        View in: PubMed
      8. Hashish R, Samarawickrame SD, Powers C, Salem GJ. Lower limb dynamics vary in shod runners who acutely transition to barefoot running. J Biomech. 2016 Jan 25; 49(2):284-8. PMID: 26803336.
        View in: PubMed
      9. Khayambashi K, Ghoddosi N, Straub RK, Powers C. Hip Muscle Strength Predicts Noncontact Anterior Cruciate Ligament Injury in Male and Female Athletes: A Prospective Study. Am J Sports Med. 2016 Feb; 44(2):355-61. PMID: 26646514.
        View in: PubMed
      10. Hunter SJ, Norton BJ, Powers C, Saladin LK, Delitto A. Rothstein Roundtable Podcast-"Putting All of Our Eggs in One Basket: Human Movement System". Phys Ther. 2015 Nov; 95(11):1466. PMID: 26522277.
        View in: PubMed
      11. Bagwell JJ, Fukuda TY, Powers C. Sagittal plane pelvis motion influences transverse plane motion of the femur: Kinematic coupling at the hip joint. Gait Posture. 2016 Jan; 43:120-4. PMID: 26471322.
        View in: PubMed
      12. Bagwell JJ, Snibbe J, Gerhardt M, Powers C. Hip kinematics and kinetics in persons with and without cam femoroacetabular impingement during a deep squat task. Clin Biomech (Bristol, Avon). 2016 Jan; 31:87-92. PMID: 26432415.
        View in: PubMed
      13. Liao TC, Yang N, Ho KY, Farrokhi S, Powers C. Femur Rotation Increases Patella Cartilage Stress in Females with Patellofemoral Pain. Med Sci Sports Exerc. 2015 Sep; 47(9):1775-80. PMID: 25606814.
        View in: PubMed
      14. Blanchette MG, Powers C. The influence of footwear tread groove parameters on available friction. Appl Ergon. 2015 Sep; 50:237-41. PMID: 25959339.
        View in: PubMed
      15. Lathan C, Myler A, Bagwell J, Powers C, Fisher BE. Pressure-controlled treadmill training in chronic stroke: a case study with AlterG. J Neurol Phys Ther. 2015 Apr; 39(2):127-33. PMID: 25742371.
        View in: PubMed
      16. Teng HL, Powers C. Influence of trunk posture on lower extremity energetics during running. Med Sci Sports Exerc. 2015 Mar; 47(3):625-30. PMID: 25003780.
        View in: PubMed
      17. Teng HL, Powers C. Sagittal plane trunk posture influences patellofemoral joint stress during running. J Orthop Sports Phys Ther. 2014 Oct; 44(10):785-92. PMID: 25155651.
        View in: PubMed
      18. Ho KY, Hu HH, Colletti PM, Powers C. Recreational runners with patellofemoral pain exhibit elevated patella water content. Magn Reson Imaging. 2014 Sep; 32(7):965-8. PMID: 24906520.
        View in: PubMed
      19. Powers C, Ho KY, Chen YJ, Souza RB, Farrokhi S. Patellofemoral joint stress during weight-bearing and non-weight-bearing quadriceps exercises. J Orthop Sports Phys Ther. 2014 May; 44(5):320-7. PMID: 24673446.
        View in: PubMed
      20. Chen YJ, Powers C. Comparison of three-dimensional patellofemoral joint reaction forces in persons with and without patellofemoral pain. J Appl Biomech. 2014 Aug; 30(4):493-500. PMID: 24603612.
        View in: PubMed
      21. Witvrouw E, Crossley K, Davis I, McConnell J, Powers C. The 3rd International Patellofemoral Research Retreat: an international expert consensus meeting to improve the scientific understanding and clinical management of patellofemoral pain. Br J Sports Med. 2014 Mar; 48(6):408. PMID: 24569143.
        View in: PubMed
      22. Witvrouw E, Callaghan MJ, Stefanik JJ, Noehren B, Bazett-Jones DM, Willson JD, Earl-Boehm JE, Davis IS, Powers C, McConnell J, Crossley KM. Patellofemoral pain: consensus statement from the 3rd International Patellofemoral Pain Research Retreat held in Vancouver, September 2013. Br J Sports Med. 2014 Mar; 48(6):411-4. PMID: 24569145.
        View in: PubMed
      23. Stearns KM, Powers C. Improvements in hip muscle performance result in increased use of the hip extensors and abductors during a landing task. Am J Sports Med. 2014 Mar; 42(3):602-9. PMID: 24464929.
        View in: PubMed
      24. Khayambashi K, Fallah A, Movahedi A, Bagwell J, Powers C. Posterolateral hip muscle strengthening versus quadriceps strengthening for patellofemoral pain: a comparative control trial. Arch Phys Med Rehabil. 2014 May; 95(5):900-7. PMID: 24440362.
        View in: PubMed
      25. Lee SP, Powers C. Individuals with diminished hip abductor muscle strength exhibit altered ankle biomechanics and neuromuscular activation during unipedal balance tasks. Gait Posture. 2014 Mar; 39(3):933-8. PMID: 24373699.
        View in: PubMed
      26. Ho KY, Hu HH, Colletti PM, Powers C. Running-induced patellofemoral pain fluctuates with changes in patella water content. Eur J Sport Sci. 2014; 14(6):628-34. PMID: 24283889.
        View in: PubMed
      27. Lyle MA, Valero-Cuevas FJ, Gregor RJ, Powers C. Control of dynamic foot-ground interactions in male and female soccer athletes: females exhibit reduced dexterity and higher limb stiffness during landing. J Biomech. 2014 Jan 22; 47(2):512-7. PMID: 24275440; PMCID: PMC3947591.
      28. Ho KY, Keyak JH, Powers C. Comparison of patella bone strain between females with and without patellofemoral pain: a finite element analysis study. J Biomech. 2014 Jan 03; 47(1):230-6. PMID: 24188973.
        View in: PubMed
      29. Teng HL, Chen YJ, Powers C. Predictors of patellar alignment during weight bearing: an examination of patellar height and trochlear geometry. Knee. 2014 Jan; 21(1):142-6. PMID: 24071368.
        View in: PubMed
      30. Stearns KM, Keim RG, Powers C. Influence of relative hip and knee extensor muscle strength on landing biomechanics. Med Sci Sports Exerc. 2013 May; 45(5):935-41. PMID: 23190597.
        View in: PubMed
      31. Lee SP, Powers C. Fatigue of the hip abductors results in increased medial-lateral center of pressure excursion and altered peroneus longus activation during a unipedal landing task. Clin Biomech (Bristol, Avon). 2013 Jun; 28(5):524-9. PMID: 23642515.
        View in: PubMed
      32. Stefanik JJ, Zumwalt AC, Segal NA, Lynch JA, Powers C. Association between measures of patella height, morphologic features of the trochlea, and patellofemoral joint alignment: the MOST study. Clin Orthop Relat Res. 2013 Aug; 471(8):2641-8. PMID: 23546847; PMCID: PMC3705075.
      33. Lee SP, Powers C. Description of a weight-bearing method to assess hip abductor and external rotator muscle performance. J Orthop Sports Phys Ther. 2013 Jun; 43(6):392-7. PMID: 23508284.
        View in: PubMed
      34. Fisher BE, Lee YY, Pitsch EA, Moore B, Southam A, Faw TD, Powers C. Method for assessing brain changes associated with gluteus maximus activation. J Orthop Sports Phys Ther. 2013 Apr; 43(4):214-21. PMID: 23485621.
        View in: PubMed
      35. Lyle MA, Valero-Cuevas FJ, Gregor RJ, Powers C. The lower extremity dexterity test as a measure of lower extremity dynamical capability. J Biomech. 2013 Mar 15; 46(5):998-1002. PMID: 23357699.
        View in: PubMed
      36. Tsai LC, Powers C. Increased hip and knee flexion during landing decreases tibiofemoral compressive forces in women who have undergone anterior cruciate ligament reconstruction. Am J Sports Med. 2013 Feb; 41(2):423-9. PMID: 23271006.
        View in: PubMed
      37. Selkowitz DM, Beneck GJ, Powers C. Which exercises target the gluteal muscles while minimizing activation of the tensor fascia lata? Electromyographic assessment using fine-wire electrodes. J Orthop Sports Phys Ther. 2013 Feb; 43(2):54-64. PMID: 23160432.
        View in: PubMed
      38. Wong YM, Straub RK, Powers C. The VMO:VL activation ratio while squatting with hip adduction is influenced by the choice of recording electrode. J Electromyogr Kinesiol. 2013 Apr; 23(2):443-7. PMID: 23141480.
        View in: PubMed
      39. Tsai YJ, Powers C. The influence of footwear sole hardness on slip characteristics and slip-induced falls in young adults. J Forensic Sci. 2013 Jan; 58(1):46-50. PMID: 23062013.
        View in: PubMed
      40. Sigward SM, Pollard CD, Havens KL, Powers C. Influence of sex and maturation on knee mechanics during side-step cutting. Med Sci Sports Exerc. 2012 Aug; 44(8):1497-503. PMID: 22330027; PMCID: PMC3399059.
      41. Ho KY, Hu HH, Keyak JH, Colletti PM, Powers C. Measuring bone mineral density with fat-water MRI: comparison with computed tomography. J Magn Reson Imaging. 2013 Jan; 37(1):237-42. PMID: 22782698.
        View in: PubMed
      42. Tsai LC, Scher IS, Powers C. Quantification of tibiofemoral shear and compressive loads using a MRI-based EMG-driven knee model. J Appl Biomech. 2013 Apr; 29(2):229-34. PMID: 22813836.
        View in: PubMed
      43. Tsai LC, McLean S, Colletti PM, Powers C. Greater muscle co-contraction results in increased tibiofemoral compressive forces in females who have undergone anterior cruciate ligament reconstruction. J Orthop Res. 2012 Dec; 30(12):2007-14. PMID: 22730173.
        View in: PubMed
      44. Powers C, Bolgla LA, Callaghan MJ, Collins N, Sheehan FT. Patellofemoral pain: proximal, distal, and local factors, 2nd International Research Retreat. J Orthop Sports Phys Ther. 2012 Jun; 42(6):A1-54. PMID: 22660660.
        View in: PubMed
      45. Lee SP, Souza RB, Powers C. The influence of hip abductor muscle performance on dynamic postural stability in females with patellofemoral pain. Gait Posture. 2012 Jul; 36(3):425-9. PMID: 22607792.
        View in: PubMed
      46. Ho KY, Blanchette MG, Powers C. The influence of heel height on patellofemoral joint kinetics during walking. Gait Posture. 2012 Jun; 36(2):271-5. PMID: 22520457.
        View in: PubMed
      47. Leahy IM, Powers C. Chondral lesion of the patella. J Orthop Sports Phys Ther. 2012 Mar; 42(3):291. PMID: 22383135.
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      48. Tsai LC, Colletti PM, Powers C. Magnetic resonance imaging-measured muscle parameters improved knee moment prediction of an EMG-driven model. Med Sci Sports Exerc. 2012 Feb; 44(2):305-12. PMID: 21775905.
        View in: PubMed
      49. Foster A, Blanchette MG, Chou YC, Powers C. The influence of heel height on frontal plane ankle biomechanics: implications for lateral ankle sprains. Foot Ankle Int. 2012 Jan; 33(1):64-9. PMID: 22381238.
        View in: PubMed
      50. Khayambashi K, Mohammadkhani Z, Ghaznavi K, Lyle MA, Powers C. The effects of isolated hip abductor and external rotator muscle strengthening on pain, health status, and hip strength in females with patellofemoral pain: a randomized controlled trial. J Orthop Sports Phys Ther. 2012 Jan; 42(1):22-9. PMID: 22027216.
        View in: PubMed
      51. Stefanik JJ, Guermazi A, Zhu Y, Zumwalt AC, Gross KD, Clancy M, Lynch JA, Segal NA, Lewis CE, Roemer FW, Powers C, Felson DT. Quadriceps weakness, patella alta, and structural features of patellofemoral osteoarthritis. Arthritis Care Res (Hoboken). 2011 Oct; 63(10):1391-7. PMID: 21702087; PMCID: PMC3183313.
      52. Lyle MA, Sigward SM, Tsai LC, Pollard CD, Powers C. Influence of maturation on instep kick biomechanics in female soccer athletes. Med Sci Sports Exerc. 2011 Oct; 43(10):1948-54. PMID: 21448083.
        View in: PubMed
      53. Woollard JD, Gil AB, Sparto P, Kwoh CK, Piva SR, Farrokhi S, Powers C, Fitzgerald GK. Change in knee cartilage volume in individuals completing a therapeutic exercise program for knee osteoarthritis. J Orthop Sports Phys Ther. 2011 Oct; 41(10):708-22. PMID: 21891881; PMCID: PMC3383656.
      54. Sigward SM, Havens KL, Powers C. Knee separation distance and lower extremity kinematics during a drop land: implications for clinical screening. J Athl Train. 2011 Sep-Oct; 46(5):471-5. PMID: 22488133; PMCID: PMC3418952.
      55. Van der Wees PJ, Moore AP, Powers C, Stewart A, Nijhuis-van der Sanden MW, de Bie RA. Development of clinical guidelines in physical therapy: perspective for international collaboration. Phys Ther. 2011 Oct; 91(10):1551-63. PMID: 21799137.
        View in: PubMed
      56. Stefanik JJ, Roemer FW, Zumwalt AC, Zhu Y, Gross KD, Lynch JA, Frey-Law LA, Lewis CE, Guermazi A, Powers C, Felson DT. Association between measures of trochlear morphology and structural features of patellofemoral joint osteoarthritis on MRI: the MOST study. J Orthop Res. 2012 Jan; 30(1):1-8. PMID: 21710542; PMCID: PMC3217080.
      57. Goldstein MS, Scalzitti DA, Bohmert JA, Brennan GP, Craik RL, Delitto A, Field-Fote EC, Magistro CM, Powers C, Shields RK. Vitalizing practice through research and research through practice: the outcomes of a conference to enhance the delivery of care. Phys Ther. 2011 Aug; 91(8):1275-84. PMID: 21659467.
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      58. Blanchette MG, Brault JR, Powers C. The influence of heel height on utilized coefficient of friction during walking. Gait Posture. 2011 May; 34(1):107-10. PMID: 21536444.
        View in: PubMed
      59. Chinkulprasert C, Vachalathiti R, Powers C. Patellofemoral joint forces and stress during forward step-up, lateral step-up, and forward step-down exercises. J Orthop Sports Phys Ther. 2011 Apr; 41(4):241-8. PMID: 21289449.
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      60. Chen YJ, Scher I, Powers C. Quantification of patellofemoral joint reaction forces during functional activities using a subject-specific three-dimensional model. J Appl Biomech. 2010 Nov; 26(4):415-23. PMID: 21245501.
        View in: PubMed
      61. Farrokhi S, Colletti PM, Powers C. Differences in patellar cartilage thickness, transverse relaxation time, and deformational behavior: a comparison of young women with and without patellofemoral pain. Am J Sports Med. 2011 Feb; 39(2):384-91. PMID: 20962335; PMCID: PMC4893957.
      62. Powers C, Fisher B. Mechanisms underlying ACL injury-prevention training: the brain-behavior relationship. J Athl Train. 2010 Sep-Oct; 45(5):513-5. PMID: 20831400; PMCID: PMC2938326.
      63. Kulig K, Harper-Hanigan K, Souza RB, Powers C. Measurement of femoral torsion by ultrasound and magnetic resonance imaging: concurrent validity. Phys Ther. 2010 Nov; 90(11):1641-8. PMID: 20724419.
        View in: PubMed
      64. Powers C, Berke GM, Clary MD, Fredericson M. Patellofemoral pain: is there a role for orthoses? PM R. 2010 Aug; 2(8):771-6. PMID: 20709305.
        View in: PubMed
      65. Souza RB, Draper CE, Fredericson M, Powers C. Femur rotation and patellofemoral joint kinematics: a weight-bearing magnetic resonance imaging analysis. J Orthop Sports Phys Ther. 2010 May; 40(5):277-85. PMID: 20436239.
        View in: PubMed
      66. Fithian DC, Powers C, Khan N. Rehabilitation of the knee after medial patellofemoral ligament reconstruction. Clin Sports Med. 2010 Apr; 29(2):283-90, ix. PMID: 20226320.
        View in: PubMed
      67. Davis IS, Powers C. Patellofemoral pain syndrome: proximal, distal, and local factors, an international retreat, April 30-May 2, 2009, Fells Point, Baltimore, MD. J Orthop Sports Phys Ther. 2010 Mar; 40(3):A1-16. PMID: 20195028.
        View in: PubMed
      68. Tonley JC, Yun SM, Kochevar RJ, Dye JA, Farrokhi S, Powers C. Treatment of an individual with piriformis syndrome focusing on hip muscle strengthening and movement reeducation: a case report. J Orthop Sports Phys Ther. 2010 Feb; 40(2):103-11. PMID: 20118521.
        View in: PubMed
      69. Powers C, Chen YJ, Scher IS, Lee TQ. Multiplane loading of the extensor mechanism alters the patellar ligament force/quadriceps force ratio. J Biomech Eng. 2010 Feb; 132(2):024503. PMID: 20370249.
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      70. Powers C. The influence of abnormal hip mechanics on knee injury: a biomechanical perspective. J Orthop Sports Phys Ther. 2010 Feb; 40(2):42-51. PMID: 20118526.
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      71. Wagner T, Behnia N, Ancheta WK, Shen R, Farrokhi S, Powers C. Strengthening and neuromuscular reeducation of the gluteus maximus in a triathlete with exercise-associated cramping of the hamstrings. J Orthop Sports Phys Ther. 2010 Feb; 40(2):112-9. PMID: 20118522.
        View in: PubMed
      72. Powers C, Blanchette MG, Brault JR, Flynn J, Siegmund GP. Validation of walkway tribometers: establishing a reference standard. J Forensic Sci. 2010 Mar 01; 55(2):366-70. PMID: 20102473.
        View in: PubMed
      73. Pollard CD, Sigward SM, Powers C. Limited hip and knee flexion during landing is associated with increased frontal plane knee motion and moments. Clin Biomech (Bristol, Avon). 2010 Feb; 25(2):142-6. PMID: 19913961; PMCID: PMC2815098.
      74. Tsai LC, Sigward SM, Pollard CD, Fletcher MJ, Powers C. Effects of fatigue and recovery on knee mechanics during side-step cutting. Med Sci Sports Exerc. 2009 Oct; 41(10):1952-7. PMID: 19727016.
        View in: PubMed
      75. Kulig K, Beneck GJ, Selkowitz DM, Popovich JM, Ge TT, Flanagan SP, Poppert EM, Yamada KA, Powers C, Azen S, Winstein CJ, Gordon J, Samudrala S, Chen TC, Shamie AN, Khoo LT, Spoonamore MJ, Wang JC. An intensive, progressive exercise program reduces disability and improves functional performance in patients after single-level lumbar microdiskectomy. Phys Ther. 2009 Nov; 89(11):1145-57. PMID: 19778981.
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      76. Souza RB, Powers C. Concurrent criterion-related validity and reliability of a clinical test to measure femoral anteversion. J Orthop Sports Phys Ther. 2009 Aug; 39(8):586-92. PMID: 19648719.
        View in: PubMed
      77. Tsai YJ, Powers C. Increased shoe sole hardness results in compensatory changes in the utilized coefficient of friction during walking. Gait Posture. 2009 Oct; 30(3):303-6. PMID: 19553123.
        View in: PubMed
      78. Souza RB, Powers C. Differences in hip kinematics, muscle strength, and muscle activation between subjects with and without patellofemoral pain. J Orthop Sports Phys Ther. 2009 Jan; 39(1):12-9. PMID: 19131677.
        View in: PubMed
      79. Souza RB, Powers C. Predictors of hip internal rotation during running: an evaluation of hip strength and femoral structure in women with and without patellofemoral pain. Am J Sports Med. 2009 Mar; 37(3):579-87. PMID: 19098153.
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      80. Sigward SM, Ota S, Powers C. Predictors of frontal plane knee excursion during a drop land in young female soccer players. J Orthop Sports Phys Ther. 2008 Nov; 38(11):661-667. PMID: 18978451.
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      81. Austin AB, Souza RB, Meyer JL, Powers C. Identification of abnormal hip motion associated with acetabular labral pathology. J Orthop Sports Phys Ther. 2008 Sep; 38(9):558-65. PMID: 18758045.
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      82. Tsai YJ, Powers C. The influence of footwear sole hardness on slip initiation in young adults. J Forensic Sci. 2008 Jul; 53(4):884-8. PMID: 18482376.
        View in: PubMed
      83. Powers C, Doubleday KL, Escudero C. Influence of patellofemoral bracing on pain, knee extensor torque, and gait function in females with patellofemoral pain. Physiother Theory Pract. 2008 May-Jun; 24(3):143-50. PMID: 18569852.
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      84. Farrokhi S, Pollard CD, Souza RB, Chen YJ, Reischl S, Powers C. Trunk position influences the kinematics, kinetics, and muscle activity of the lead lower extremity during the forward lunge exercise. J Orthop Sports Phys Ther. 2008 Jul; 38(7):403-9. PMID: 18591759.
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      85. Souza RB, Powers C. Trochlear groove spur in a patient with patellofemoral pain. J Orthop Sports Phys Ther. 2008 Mar; 38(3):158. PMID: 18349495.
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      86. Powers C, Beneck GJ, Kulig K, Landel RF, Fredericson M. Effects of a single session of posterior-to-anterior spinal mobilization and press-up exercise on pain response and lumbar spine extension in people with nonspecific low back pain. Phys Ther. 2008 Apr; 88(4):485-93. PMID: 18258767.
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      87. Burke WS, Vangsness CT, Powers C. Quantification of two-dimensional glenohumeral rhythm in persons with and without symptoms of shoulder impingement. Am J Orthop (Belle Mead NJ). 2008 Jan; 37(1):24-30. PMID: 18309381.
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      88. Landel R, Kulig K, Fredericson M, Li B, Powers C. Intertester reliability and validity of motion assessments during lumbar spine accessory motion testing. Phys Ther. 2008 Jan; 88(1):43-9. PMID: 18029394.
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      89. Burnfield JM, Powers C. The role of center of mass kinematics in predicting peak utilized coefficient of friction during walking. J Forensic Sci. 2007 Nov; 52(6):1328-33. PMID: 17868269.
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      90. Ward SR, Terk MR, Powers C. Patella alta: association with patellofemoral alignment and changes in contact area during weight-bearing. J Bone Joint Surg Am. 2007 Aug; 89(8):1749-55. PMID: 17671014.
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      91. Sigward SM, Powers C. Loading characteristics of females exhibiting excessive valgus moments during cutting. Clin Biomech (Bristol, Avon). 2007 Aug; 22(7):827-33. PMID: 17531364.
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      92. Feller JA, Amis AA, Andrish JT, Arendt EA, Erasmus PJ, Powers C. Surgical biomechanics of the patellofemoral joint. Arthroscopy. 2007 May; 23(5):542-53. PMID: 17478287.
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      93. Powers C, Brault JR, Stefanou MA, Tsai YJ, Flynn J, Siegmund GP. Assessment of walkway tribometer readings in evaluating slip resistance: a gait-based approach. J Forensic Sci. 2007 Mar; 52(2):400-5. PMID: 17316240.
        View in: PubMed
      94. Kulig K, Powers C, Landel RF, Chen H, Fredericson M, Guillet M, Butts K. Segmental lumbar mobility in individuals with low back pain: in vivo assessment during manual and self-imposed motion using dynamic MRI. BMC Musculoskelet Disord. 2007 Jan 29; 8:8. PMID: 17261197; PMCID: PMC1794409.
      95. Pollard CD, Sigward SM, Powers C. Gender differences in hip joint kinematics and kinetics during side-step cutting maneuver. Clin J Sport Med. 2007 Jan; 17(1):38-42. PMID: 17304004.
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      96. Powers C, Chen YJ, Farrokhi S, Lee TQ. Role of peripatellar retinaculum in transmission of forces within the extensor mechanism. J Bone Joint Surg Am. 2006 Sep; 88(9):2042-8. PMID: 16951122.
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      97. Ota S, Ward SR, Chen YJ, Tsai YJ, Powers C. Concurrent criterion-related validity and reliability of a clinical device used to assess lateral patellar displacement. J Orthop Sports Phys Ther. 2006 Sep; 36(9):645-52. PMID: 17017269.
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      98. Griffin LY, Albohm MJ, Arendt EA, Bahr R, Beynnon BD, Demaio M, Dick RW, Engebretsen L, Garrett WE, Hannafin JA, Hewett TE, Huston LJ, Ireland ML, Johnson RJ, Lephart S, Mandelbaum BR, Mann BJ, Marks PH, Marshall SW, Myklebust G, Noyes FR, Powers C, Shields C, Shultz SJ, Silvers H, Slauterbeck J, Taylor DC, Teitz CC, Wojtys EM, Yu B. Understanding and preventing noncontact anterior cruciate ligament injuries: a review of the Hunt Valley II meeting, January 2005. Am J Sports Med. 2006 Sep; 34(9):1512-32. PMID: 16905673.
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      99. Selkowitz DM, Kulig K, Poppert EM, Flanagan SP, Matthews ND, Beneck GJ, Popovich JM, Lona JR, Yamada KA, Burke WS, Ervin C, Powers C. The immediate and long-term effects of exercise and patient education on physical, functional, and quality-of-life outcome measures after single-level lumbar microdiscectomy: a randomized controlled trial protocol. BMC Musculoskelet Disord. 2006 Aug 25; 7:70. PMID: 16934143; PMCID: PMC1599723.
      100. Sigward S, Powers C. The influence of experience on knee mechanics during side-step cutting in females. Clin Biomech (Bristol, Avon). 2006 Aug; 21(7):740-7. PMID: 16675083.
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      101. Pollard CD, Sigward SM, Ota S, Langford K, Powers C. The influence of in-season injury prevention training on lower-extremity kinematics during landing in female soccer players. Clin J Sport Med. 2006 May; 16(3):223-7. PMID: 16778542.
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      102. Powers C, Chen YJ, Scher I, Lee TQ. The influence of patellofemoral joint contact geometry on the modeling of three dimensional patellofemoral joint forces. J Biomech. 2006; 39(15):2783-91. PMID: 16307751.
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      103. Sigward SM, Powers C. The influence of gender on knee kinematics, kinetics and muscle activation patterns during side-step cutting. Clin Biomech (Bristol, Avon). 2006 Jan; 21(1):41-8. PMID: 16209900.
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      104. Ganley KJ, Powers C. Intersegmental dynamics during the swing phase of gait: a comparison of knee kinetics between 7 year-old children and adults. Gait Posture. 2006 Jun; 23(4):499-504. PMID: 16112573.
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      105. Burnfield JM, Tsai YJ, Powers C. Comparison of utilized coefficient of friction during different walking tasks in persons with and without a disability. Gait Posture. 2005 Aug; 22(1):82-8. PMID: 15996597.
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      106. Beneck GJ, Kulig K, Landel RF, Powers C. The relationship between lumbar segmental motion and pain response produced by a posterior-to-anterior force in persons with nonspecific low back pain. J Orthop Sports Phys Ther. 2005 Apr; 35(4):203-9. PMID: 15901121.
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      107. Ganley KJ, Powers C. Gait kinematics and kinetics of 7-year-old children: a comparison to adults using age-specific anthropometric data. Gait Posture. 2005 Feb; 21(2):141-5. PMID: 15639392.
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      108. Ward SR, Terk MR, Powers C. Influence of patella alta on knee extensor mechanics. J Biomech. 2005 Dec; 38(12):2415-22. PMID: 16214489.
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      109. Ward SR, Powers C. The influence of patella alta on patellofemoral joint stress during normal and fast walking. Clin Biomech (Bristol, Avon). 2004 Dec; 19(10):1040-7. PMID: 15531054.
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      110. Powers C, Ward SR, Chan LD, Chen YJ, Terk MR. The effect of bracing on patella alignment and patellofemoral joint contact area. Med Sci Sports Exerc. 2004 Jul; 36(7):1226-32. PMID: 15235330.
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      111. Powers C, Ward SR, Chen YJ, Chan LD, Terk MR. Effect of bracing on patellofemoral joint stress while ascending and descending stairs. Clin J Sport Med. 2004 Jul; 14(4):206-14. PMID: 15273526.
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      112. Ganley KJ, Powers C. Anthropometric parameters in children: a comparison of values obtained from dual energy x-ray absorptiometry and cadaver-based estimates. Gait Posture. 2004 Apr; 19(2):133-40. PMID: 15013501.
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      113. Kulig K, Landel R, Powers C. Assessment of lumbar spine kinematics using dynamic MRI: a proposed mechanism of sagittal plane motion induced by manual posterior-to-anterior mobilization. J Orthop Sports Phys Ther. 2004 Feb; 34(2):57-64. PMID: 15029938.
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      114. Cormack J, Powers C. Is there evidence that botulinum toxin injections are more effective than phenol injections in relieving poststroke reflex activity during plantar flexion, thereby increasing ankle range of motion and improving gait function? Phys Ther. 2004 Jan; 84(1):76-84. PMID: 14992678.
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      115. Ganley KJ, Powers C. Determination of lower extremity anthropometric parameters using dual energy X-ray absorptiometry: the influence on net joint moments during gait. Clin Biomech (Bristol, Avon). 2004 Jan; 19(1):50-6. PMID: 14659930.
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      116. Powers C, Ward SR, Chen YJ, Chan LD, Terk MR. The effect of bracing on patellofemoral joint stress during free and fast walking. Am J Sports Med. 2004 Jan-Feb; 32(1):224-31. PMID: 14754748.
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      117. Salsich GB, Ward SR, Terk MR, Powers C. In vivo assessment of patellofemoral joint contact area in individuals who are pain free. Clin Orthop Relat Res. 2003 Dec; (417):277-84. PMID: 14646727.
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      118. Mascal CL, Landel R, Powers C. Management of patellofemoral pain targeting hip, pelvis, and trunk muscle function: 2 case reports. J Orthop Sports Phys Ther. 2003 Nov; 33(11):647-60. PMID: 14669960.
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      119. Heino Brechter J, Powers C, Terk MR, Ward SR, Lee TQ. Quantification of patellofemoral joint contact area using magnetic resonance imaging. Magn Reson Imaging. 2003 Nov; 21(9):955-9. PMID: 14684196.
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      120. Powers C. The influence of altered lower-extremity kinematics on patellofemoral joint dysfunction: a theoretical perspective. J Orthop Sports Phys Ther. 2003 Nov; 33(11):639-46. PMID: 14669959.
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      121. Powers C, Ward SR, Fredericson M, Guillet M, Shellock FG. Patellofemoral kinematics during weight-bearing and non-weight-bearing knee extension in persons with lateral subluxation of the patella: a preliminary study. J Orthop Sports Phys Ther. 2003 Nov; 33(11):677-85. PMID: 14669963.
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      122. Powers C, Kulig K, Harrison J, Bergman G. Segmental mobility of the lumbar spine during a posterior to anterior mobilization: assessment using dynamic MRI. Clin Biomech (Bristol, Avon). 2003 Jan; 18(1):80-3. PMID: 12527251.
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      123. Powers C, Burnfield JM, Lim P, Brault JM, Flynn JE. Utilized coefficient of friction during walking: static estimates exceed measured values. J Forensic Sci. 2002 Nov; 47(6):1303-8. PMID: 12455654.
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      124. Heino Brechter J, Powers C. Patellofemoral stress during walking in persons with and without patellofemoral pain. Med Sci Sports Exerc. 2002 Oct; 34(10):1582-93. PMID: 12370559.
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      125. Brechter JH, Powers C. Patellofemoral joint stress during stair ascent and descent in persons with and without patellofemoral pain. Gait Posture. 2002 Oct; 16(2):115-23. PMID: 12297253.
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      126. Burke WS, Vangsness CT, Powers C. Strengthening the supraspinatus: a clinical and biomechanical review. Clin Orthop Relat Res. 2002 Sep; (402):292-8. PMID: 12218496.
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      127. Powers C, Chen PY, Reischl SF, Perry J. Comparison of foot pronation and lower extremity rotation in persons with and without patellofemoral pain. Foot Ankle Int. 2002 Jul; 23(7):634-40. PMID: 12146775.
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      128. Ward SR, Shellock FG, Terk MR, Salsich GB, Powers C. Assessment of patellofemoral relationships using kinematic MRI: comparison between qualitative and quantitative methods. J Magn Reson Imaging. 2002 Jul; 16(1):69-74. PMID: 12112505.
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      129. Wallace DA, Salem GJ, Salinas R, Powers C. Patellofemoral joint kinetics while squatting with and without an external load. J Orthop Sports Phys Ther. 2002 Apr; 32(4):141-8. PMID: 11949662.
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      130. Salsich GB, Brechter JH, Farwell D, Powers C. The effects of patellar taping on knee kinetics, kinematics, and vastus lateralis muscle activity during stair ambulation in individuals with patellofemoral pain. J Orthop Sports Phys Ther. 2002 Jan; 32(1):3-10. PMID: 11787906.
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      131. Fredericson M, Powers C. Practical management of patellofemoral pain. Clin J Sport Med. 2002 Jan; 12(1):36-8. PMID: 11854587.
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      132. Powers C, Lilley JC, Lee TQ. The effects of axial and multi-plane loading of the extensor mechanism on the patellofemoral joint. Clin Biomech (Bristol, Avon). 1998 Dec; 13(8):616-624. PMID: 11415841.
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