Title:

Assistant Professor

Office Information:

UNC Chapel Hill
328 Taylor Hall
109 Mason Farm Road
Chapel Hill, NC 27514
(919) 966-6119

Education:

B.S., Engineering Science and Mechanics, Virginia Tech, 2004
M.S., Engineering Mechanics (Biomechanics), Virginia Tech, 2006
Ph.D., Integrative Physiology, University of Colorado Boulder, 2012

Email:

jrfranz@email.unc.edu

Lab Site:

http://abl.bme.unc.edu/

Research and Publications:

Rehabilitation Engineering
Neuromuscular biomechanics; Sensorimotor control; Aging and age-related mobility impairment
The overarching goal of our research program is to investigate musculoskeletal and sensorimotor mechanisms governing mobility impairment and falls risk due to aging and neurological injury and disease, and to introduce creative new rehabilitative approaches for preserving independent mobility and preventing falls. We use a highly integrative approach that combines quantitative motion analysis and electromyography with dynamic ultrasound imaging, computational simulation, and virtual reality.
Franz JR and Thelen DG. Depth-dependent variations in Achilles tendon deformations with age are associated with reduced plantarflexor performance during walking. Journal of Applied Physiology (In Press).
Franz JR, Francis, CA, Allen MS, O’Connor SM, Thelen DG (2015). Advanced age brings a greater reliance on visual feedback to maintain balance during walking. Human Movement Science; 40: 381-92.
Franz JR, Slane LC, Rasske K, Thelen DG (2015). Non-uniform in vivo deformations of the human Achilles tendon during walking. Gait & Posture; 41(1): 192-7.
Franz JR, Maletis M, Kram R (2014). Real-time feedback enhances forward propulsion during walking in old adults. Clinical Biomechanics; 29(1): 68-74.
Franz JR, Kram R (2013). Advanced age affects the individual leg mechanics of level, uphill, and downhill walking. Journal of Biomechanics; 46(3):535-40.
Franz JR, Francis CA, Allen MS, Thelen DG (In Press). Visuomotor entrainment and the frequency-dependent response of walking balance to perturbations. IEEE Transactions on Neural Systems & Rehabilitation Engineering.
Rasske K, Thelen DG, Franz JR (2016). Variations in the human Achilles tendon moment arm during walking. Computer Methods in Biomechanics and Biomedical Engineering; 27:1-5.
Franz JR (2016). The age-associated reduction in propulsive power generation during walking. Exercise and Sports Sciences Reviews; 44(4): 129-36.
Franz JR and Thelen DG (2016). Imaging and simulation of Achilles tendon dynamics: implications for walking performance in the elderly (ASB Young Scientist Post-doctoral Award). Journal of Biomechanics; 49(9): 1403-10.
Francis CA, Franz JR, O’Connor SM, Thelen DG (2015). Gait variability in healthy old adults is more affected by a visual perturbation than by a cognitive or narrow step placement demand. Gait & Posture; 42(3): 380-5.
Franz JR and Thelen DG (2015). Depth-dependent variations in Achilles tendon deformations with age are associated with reduced plantarflexor performance during walking. Journal of Applied Physiology; 119(3): 242-9.
Franz JR, Francis, CA, Allen MS, O’Connor SM, Thelen DG (2015). Advanced age brings a greater reliance on visual feedback to maintain balance during walking. Human Movement Science; 40: 381-92.
Franz JR, Slane LC, Rasske K, Thelen DG (2015). Non-uniform in vivo deformations of the human Achilles tendon during walking. Gait & Posture; 41(1): 192-7.
Franz JR, Maletis M, Kram R (2014). Real-time feedback enhances forward propulsion during walking in old adults. Clinical Biomechanics; 29(1): 68-74.
Tung KD, Franz JR, Kram R (2014). A test of the metabolic cost of cushioning hypothesis in shod and unshod running. Medicine & Science in Sports & Exercise; 46:324-9.
Franz JR and Kram R (2014). Advanced age and the mechanics of uphill walking: a joint-level, inverse dynamic analysis. Gait & Posture; 39(1):135-40.
Pubmed