John H. Challis
Ph.D., 1991, Biomechanics, Loughborough University of Technology, UK
Associate Professor of Kinesiology; Graduate Program Director
Contact Information
029J Recreation Building
Pennsylvania State University
University Park, PA 16802
(814) 863-3675
Fax: (814) 865-2440
http://www.personal.psu.edu/faculty/jhc10/
Research Interests
Measurement and simulation modeling of the human musculo-skeletal system, with the aim of examining the role, function, and coordination of muscle in vivo. Development of improved biomechanical measurement protocols.
Selected Publications
Pain, M.T.G., and Challis, J.H. (2006) The influence of soft tissue movement on ground reaction forces, joint torques and joint reaction forces in drop landings. Journal of Biomechanics 39:1;119-124.
Hertel, J., Olmsted-Kramer. L.C., and Challis, J.H. (2006) Time-to-boundary measures of postural control in single limb quiet standing. Journal of Applied Biomechanics 22:1;67-73.
Challis, J.H. (2006) Aging, regularity and variability in maximum isometric moments. Journal of Biomechanics 39:8;1543-1546.
Jordan, K., Challis, J.H., and Newell, K.M. (2006) Long range correlations in the stride interval of running. Gait & Posture 24:1;120-125.
Rosenbaum, D.A., Dawson, A., and Challis, J.H. (2006) Haptic tracking permits bimanual independence. Journal of Experimental Psychology: Human Perception and Performance 32:5;1266-1275.
Domire, Z.J., and Challis, J.H. (2007) The influence of squat depth on maximal vertical jump performance. Journal of Sports Sciences 25(2), 193-200.
Jordan, K., Challis, J.H., and Newell, K.M. (2007) Speed influences on the scaling behavior of gait cycle fluctuations during treadmill running. Human Movement Science 26(1), 87-102.
Jordan, K., Challis, J.H., and Newell, K.M. (2007) Walking speed influences on gait cycle variability. Gait & Posture 26(1), 128-134.
Infantalino, B, W., Gales, D.J., Winter, S.L., and Challis, J.H. (2007) The validity of ultrasound estimation of muscle volumes.. Journal of Applied Biomechanics 23(3), 213-217.
Domire, Z.J., and Challis, J.H. (2007) The influence of an elastic tendon on the force producing capabilities of a muscle during dynamic movements. Computer Methods in Biomechanics & Biomedical Engineering 10 ( 5), 337 – 341.