H. John Yack, PT, Ph.D.

Portrait: H. John Yack

Associate Professor
Graduate Program in Physical Therapy & Rehabilitation Science

The University of Iowa
1-243 Medical Education Building
Iowa City, Iowa 52242-1190
Tel.: (319) 335-9802
john-yack@uiowa.edu

Education & Training

  • 1987 PhD in Biomechanics, University of Waterloo, Waterloo, Canada.
  • 1981 MS in Physical Therapy, University of North Carolina, Chapel Hill, NC.
  • 1975 Certificate in Physical Therapy, Northwestern University Medical Center, Chicago, IL.
  • 1973 BS in Occupational Therapy, University of New Hampshire, Durham, NH.

Research Activities

  • Co-Director, ORTHOPAEDIC GAIT ANALYSIS LABORATORY
  • Three dimensional modeling of the lower limb as it relates to:
    • ACL injury/rehabilitation
    • Total knee arthroplasty design/rehabilitation
    • Total hip arthroplasty design/rehabilitation
    • Foot pathology and compensatory strategies
    • Children with neuromuscular dysfunctions
    • Prosthetic function in patients with amputations

Teaching Responsibilities

  • DPT- Kinesiology & Pathomechanics (101:210)
  • PhD--Biomechanical Analysis in Rehabilitation (101:285)

Academic & Professional Activities

  • Memberships: APTA, International Society of Biomechanics, American Society of Biomechanics, Canadian Society of Biomechanics, Gait and Clinical Movement Analysis Society.
  • University Committees: Faculty, Staff & Student Affairs (FSSA) Committee, Curriculum and Instruction (C&I) Committee, Research and Development (R&D) Committee, Faculty Committee

Recent Graduate Students

  • Shweta Dhamani, MA, 2007, Iowa City, IA
  • Ashmeet Kalra, MA, 2007, Iowa City, IA
  • Smita Rao, PhD, 2006, Ithaca College, Rochester, NY
  • Jason Wilken, PhD, 2006, Brooke Army Medical Center, Ft. Sam Houston, TX
  • Priyanka Khole, MA, 2006, Fairfax, VA
  • Prajakta Joshi, MA, 2005, Waterloo, IA
  • Ruchika Wahi, MA, 2001, Abbott Labs, Chicago, IL
  • Tyler Cuddeford, PhD, 2000, Nike Sports Research Laboratory, Portland, OR
  • William Ogard, PhD, 2000, University of Alabama, Birmingham, AL
  • Jeffery Houck, PhD, 1999, Ithaca College, Rochester, NY
  • Ward Glasoe, MA, 1997, Physiotherapy Associates, Cedar Rapids, IA

Selected Publications

  • Rao S, Saltzman C, Yack HJ. Segmental foot mobility in individuals with and without diabetes and neuropathy. Clin Biomech 22(4):464-71, May 2007.
  • Rao S, Saltzman C, Wilken J, Yack HJ. Increased passive ankle stiffness and reduced dorsiflexion range of motion in individuals with diabetes mellitus. Foot Ankle Int 27:617-22, 2006.
  • Puthoff ML, Darter BJ, Nielsen DH, Yack HJ. The effect of weighted vest walking on metabolic responses and ground reaction forces. Med Sci Sports Exerc 38(4):746-52, 2006.
  • Rao S, Saltzman C, Yack HJ. Ankle ROM and stiffness measured at rest and during gait in individuals with and without diabetic sensory neuropathy. Gait & Posture. Nov;24(3):295-301, 2006.
  • Houck J, Yack HJ, Cuddeford T. Validity and comparisons of tibiofemoral orientations and displacement using a femoral tracking device during early to mid stance of walking. Gait Posture 19(1):76-84, 2004.
  • Lin-Chan S, Bilodeau M, Yack HJ, Nielsen DH: The force-driven harmonic oscillator model for energy-efficient locomotion in individuals with transtibial amputation. Human Movement Science 22(6):611-630, 2004.
  • Allen MK, Cuddeford TJ, Glasoe WM, DeKam LM, Lee PJ, Wagner KJ, Yack HJ. Relationship between static mobility of the first ray and first ray, midfoot, and hindfoot motion during gait. Foot Ankle Int 25(6):391-396, 2004.