Publications
Journal Papers
EMG-informed estimates of joint contact forces within the lower-back and knee joints during a diverse set of industry-relevant manual lifting tasks
F. Davenport, J. K. Leestma, A. Staten, K. Bhakta, J. Fernandez, A. Mazumdar, A. J. Young, and G. S. Sawicki
Journal of Applied Biomechanics (in press)
A data-driven approach to estimate human center of mass state during perturbed locomotion using simulated wearable sensors
J. K. Leestma, C. R. Smith, G. S. Sawicki, and A. J. Young
Annals of Biomedical Engineering (2024)
PAPER
Dynamic duo: Design and validation of an autonomous frontal and sagittal actuating hip exoskeleton for step placement modulation during perturbed locomotion
J. K. Leestma, S. Mathur, M. Anderton, G. S. Sawicki, and A. J. Young
Robotics and Automation Letters (2024)
PAPER
Linking whole-body angular momentum and step placement during perturbed walking
J. K. Leestma, P. R. Golyski, C. R. Smith, G. S. Sawicki, and A. J. Young
Journal of Experimental Biology (2023)
PAPER | PDF | DATA SET | COMING SOON: EXTENDED DATA SET
– Selected for Journal of Experimental Biology Early-Career Researcher Spotlight Interview
– Shortlist (top 12) for 2023 Journal of Experimental Biology Outstanding Paper Prize
Conference Papers
2017
C. Olney, J. Leestma, A. Hansen, J. Ferguson, M. Murphy Kruse, & G. Goldish, “Skin Self-Screening Camera for Veterans with Spinal Cord Injury” in ASME Frontiers in Biomedical Devices, 2017 Design of Medical Devices Conference. PAPER
Patents
2022
A. H. Hansen, E. Nickel, B. Slater, S. Fairhurst, and J. Leestma. “Breathable Residual-Limb Socket System” U.S. Patent App. No. 17/025,008, issued May 10, 2022. LINK
Conference Abstracts & Presentations
2024
Albarran, C. May, K. Herrin, J. Leestma, T. Harvey, A. Young, G. Sawicki, and C. Rozell, “Anterior cingulate dynamics during effortful walking in humans”, Society for Neuroscience (Chicago, IL), poster presentation.
J. Leestma, L. Ting, A. Young, and G. Sawicki, “‘Faster than human’ exoskeleton responses for balance augmentation during locomotion”, Dynamic Walking (Pensacola, FL), podium presentation.
J. K. Leestma, G. S. Sawicki, and A. J. Young, “Ahead of its time: Data-driven approaches enable artificially-fast bio-inspired hip exoskeleton control for balance augmentation during locomotion,” American Society of Biomechanics 2024 (Madison, WI), podium presentation.
– Selected for the 2024 American Society of Biomechanics Pre-Doctoral Achievement Award
J. K. Leestma, R. Emadi, G. S. Sawicki, and A. J. Young, “Two feet, one force plate: A novel machine learning approach solves for bilateral ground reaction forces on a single force plate,” American Society of Biomechanics 2024 (Madison, WI), thematic poster presentation.
V. Iyer, J. K. Leestma, A. J. Young, and G. S. Sawicki, “Investigating the role of hip joint moments in modulating mediolateral step placement during perturbed walking,” American Society of Biomechanics 2024 (Madison, WI), poster presentation.
T. Harvey, J. K. Leestma, G. S. Sawicki, and A. J. Young, “Comparing real vs. simulated linear acceleration IMU data during steady-state walking,” American Society of Biomechanics 2024 (Madison, WI), poster presentation.
2023
J. K. Leestma, V. Iyer, A. J. Young, and G. S. Sawicki, “Hop, skip, and a jump: Investigating why people jump in response to walking perturbations,” American Society of Biomechanics 2023 (Knoxville, Tennessee), podium presentation. ABSTRACT
J. K. Leestma, G. S. Sawicki, and A. J. Young, “Does the relationship between whole-body angular momentum and step placement change in individuals post-stroke?,” American Society of Biomechanics 2023 (Knoxville, Tennessee), podium presentation. ABSTRACT
F. R. Davenport, J. K. Leestma, C. Nuesslein, J. Fernandez, R. Kim, R. Casey, J. Wheeler, A. Mazumdar, A. J. Young, and G. S. Sawicki, “Unloading the load: Influence of exoskeleton mitigation on joint-level biomechanics during industrial lifting tasks,” American Society of Biomechanics 2023 (Knoxville, Tennessee), podium presentation. ABSTRACT
J. K. Leestma, V. Iyer, A. J. Young, and G. S. Sawicki, “When limbs collide: When and why people jump in response to perturbations during walking,” Dynamic Walking 2023 (Munich, Germany), podium & poster presentation. VIDEO ABSTRACT | RECORDED PRESENTATION
2022
J. K. Leestma, C. Smith, G. S. Sawicki, and A. J. Young, “Whole body angular momentum change predicts stepping strategy in perturbed walking,” North American Congress of Biomechanics 2022 (Ottawa, Ontario, Canada), poster presentation. ABSTRACT | POSTER | PERTURBATION EXAMPLES
C. R. Smith, J. K. Leestma, G. S. Sawicki, and A. J. Young, “Predicting whole body angular momentum with wearable sensors,” North American Congress of Biomechanics 2022 (Ottawa, Ontario, Canada), poster presentation. ABSTRACT | POSTER
F. R. Davenport, J. K. Leestma, A. Staten, K. Bhakta, J. Fernandez, A. Mazumdar, A. J. Young, and G. S. Sawicki, “Moment of contact: Comprehensive biomechanical landscape/framework to inform exoskeleton mitigation,” North American Congress of Biomechanics 2022 (Ottawa, Ontario, Canada), poster presentation. POSTER
J. K. Leestma, G. S. Sawicki, A. J. Young, “Single step to stop: Perturbed human step placement relative to desired single-step recovery targets,” Dynamic Walking 2022 (Madison, WI), poster presentation.
2021
J. K. Leestma, C. Smith, G. S. Sawicki, and A. J. Young, “Effects of perturbation timing on step placement predictability using a linear model,” Dynamic Walking 2021 (Virtual), poster presentation. ABSTRACT | POSTER
H. Fehr, J. A. Kent, J. K. Leestma, J. Nakum, M. J. Major, and P. G. Adamczyk, “Using dynamic mean ankle moment arm to generate a biomimetic prosthetic ankle control law,” Dynamic Walking 2021 (Virtual), poster presentation.
H. Fehr, J. A. Kent, J. K. Leestma, J. Nakum, M. J. Major, and P. G. Adamczyk, “A biomimetic control law for a variable stiffness prosthetic foot using dynamic mean ankle moment arm,” Military Healthy System Research Symposium (Virtual), poster presentation.
J. K. Leestma, G. S. Sawicki, and A. J. Young, “Perturbation direction reverses the effect of timing on peak center of mass speed,” American Society of Biomechanics (Virtual), August 2021, podium presentation. ABSTRACT | PRESENTATION SLIDES | RECORDED PRESENTATION
2020
J. K. Leestma, G. S. Sawicki, and A. J. Young, “Spatiotemporal recovery responses used to combat translational platform perturbations during walking,” American Society of Biomechanics (Virtual), August 2020, poster presentation. ABSTRACT | POSTER
J. K. Leestma, G. S. Sawicki, and A. J. Young, “Responses to locomotion commotion caused by translation perturbations,” Dynamic Walking (Virtual), May 2020, poster presentation. ABSTRACT | POSTER
P. R. Golyski, E. Vazquez, J. K. Leestma, & G. S. Sawicki, “When are we least stable during walking?” Career, Research, and Innovation Development Conference (Atlanta, GA), poster presentation. ABSTRACT | POSTER
2019
A. F. Azocar, J. K. Leestma, P. Kudzia, M. Lazzaroni, Y. Liu, C. Bayón, W. F. Rampeltshammer, & E. van Asseldonk, “Passive Knee Exoskeleton Reduces Quadriceps Muscle Activation During Downhill Skiing: A Pilot Study,” Engineering in Medicine and Biology Conference (Berlin, Germany), poster presentation. ABSTRACT | POSTER
J. K. Leestma & P. G. Adamczyk, “Effects of Prosthetic Forefoot Stiffness on the External Mean Ankle Moment Arm (EMAMA) in Different Activities,” International Society of Biomechanics and American Society of Biomechanics Conference (Calgary, Canada), oral presentation. ABSTRACT | PRESENTATION SLIDES
J. Leestma, R. Woodward, & L. Hargrove, “Extension of the Target Achievement Control Test to an Immersive 3D Virtual Environment,” Trent International Prosthetics Symposium (Manchester, United Kingdom), March 2019, poster presentation. ABSTRACT
2017
C. Olney, J. Leestma, A. Hansen, J. Ferguson, M. Murphy Kruse, & G. Goldish, “Pressure Injury Prevention: Self-Screening Camera Design and Development,” Academy of Spinal Cord Injury Professionals Conference (Denver, CO), September 2017, poster presentation.
C. Olney, J. Leestma, A. Hansen, J. Ferguson, M. Murphy Kruse, & G. Goldish, “Skin Self-Screening Camera for Veterans with Spinal Cord Injury,” Design of Medical Devices Conference (Minneapolis, MN), April 2017, poster presentation.