Jason R. Franz

ORCID: 0000-0001-9523-9708
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About
Contact & Profiles
Research Areas
  • Muscle activation and electromyography studies
  • Balance, Gait, and Falls Prevention
  • Sports injuries and prevention
  • Lower Extremity Biomechanics and Pathologies
  • Cerebral Palsy and Movement Disorders
  • Knee injuries and reconstruction techniques
  • Sports Performance and Training
  • Tendon Structure and Treatment
  • Total Knee Arthroplasty Outcomes
  • Diabetic Foot Ulcer Assessment and Management
  • Foot and Ankle Surgery
  • Motor Control and Adaptation
  • Stroke Rehabilitation and Recovery
  • Osteoarthritis Treatment and Mechanisms
  • Prosthetics and Rehabilitation Robotics
  • Shoulder Injury and Treatment
  • Musculoskeletal pain and rehabilitation
  • Effects of Vibration on Health
  • Sports Dynamics and Biomechanics
  • Injury Epidemiology and Prevention
  • Orthopedic Surgery and Rehabilitation
  • Spinal Cord Injury Research
  • Acupuncture Treatment Research Studies
  • Hip and Femur Fractures
  • Winter Sports Injuries and Performance

North Carolina State University
2016-2025

University of North Carolina at Chapel Hill
2016-2025

UNC/NCSU Joint Department of Biomedical Engineering
2021-2025

GTx (United States)
2024

North Central State College
2020-2023

Google (United States)
2017-2021

University of Wisconsin–Madison
1997-2015

University of Colorado Boulder
2009-2013

University of Virginia
2007-2012

University of Regensburg
2012

The purpose of this study was to compare the kinematic and kinetic parameters treadmill running those overground running.Twenty healthy young subjects ran at their self-selected moderate speed. Motion capture ground reaction force (GRF) data for three strides each limb were recorded subjects' average speed evaluated. then on an instrumented set while motion GRF recorded. kinematics (body segment orientations joint angles) kinetics (net moments powers) (15 consecutive gait cycles) (three...

10.1249/mss.0b013e3181677530 article EN Medicine & Science in Sports & Exercise 2008-05-15

Based on mass alone, one might intuit that running barefoot would exact a lower metabolic cost than in shoes. Numerous studies have shown adding to shoes increases submaximal oxygen uptake (V˙O(2)) by approximately 1% per 100 g shoe. However, only two of the seven topic found statistically significant difference V˙O(2) between and shod running. The lack these suggests factors other shoe (e.g., experience, foot strike pattern, construction) may play important roles determining versus Our goal...

10.1249/mss.0b013e3182514a88 article EN Medicine & Science in Sports & Exercise 2012-02-25

Objective To determine the effect of modern‐day running shoes on lower extremity joint torques during running. Design Two‐condition experimental comparison. Setting A 3‐dimensional motion analysis laboratory. Participants total 68 healthy young adult runners (37 women) who typically run in shoes. Methods All subjects ran barefoot and same type stability footwear at a controlled speed. Three‐dimensional capture data were collected synchrony with ground reaction force from an instrumented...

10.1016/j.pmrj.2009.09.011 article EN PM&R 2009-12-01

10.1186/s12984-025-01555-6 article EN cc-by-nc-nd Journal of NeuroEngineering and Rehabilitation 2025-01-23

This study aimed to investigate the effects of surface and shoe cushioning on metabolic cost running. In running, leg muscles generate force cushion impact with ground. External (surfaces or shoes) may reduce muscular effort needed for thus cost. Our primary hypothesis was that unshod running would decrease a more cushioned surface. We also hypothesized because counteracting mass, hard have approximately same as in lightweight, shoes.To test these hypotheses, we attached 10- 20-mm-thick...

10.1249/mss.0b013e3182a63b81 article EN Medicine & Science in Sports & Exercise 2013-07-27

Introduction Compared to young adults, older adults walk with smaller propulsive forces and a redistribution more proximal leg muscles for power generation during push-off. Despite this deficit in function, can increase push-off intensity when encouraged via real-time biofeedback. However, the specific joint-level modifications used by enhance force has yet be elucidated. The purpose of study was identify modulate walking at their preferred speed. Methods 9 16 walked speed while visual...

10.1371/journal.pone.0201407 article EN cc-by PLoS ONE 2018-08-08

During locomotion, force-producing limb muscles are predominantly responsible for an animal's whole body metabolic energy expenditure. Animals can change the length of their muscle fascicles by altering posture (e.g., joint angles), structural properties biological tissues over time tendon stiffness), or body's kinetics weight). Currently, it is uncertain whether relative fascicle operating lengths have a measurable effect on expended during cyclic locomotion-like contractions. To address...

10.1152/japplphysiol.00720.2021 article EN Journal of Applied Physiology 2022-07-14

Abstract Context: Knowledge of the kinetic changes that occur during sloped running is important in understanding adaptive gait-control mechanisms at work and can provide additional information about poorly understood relationship between injury forces lower extremity. A study these potential merits consideration, because training return-to-activity programs are potentially modifiable factors for tissue stress risk. Objective: To contribute further to hill by quantifying 3-dimensional...

10.4085/1062-6050-45.1.16 article EN Journal of Athletic Training 2010-01-01
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