JOHN H. CHALLIS

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Research Interests

The following reflect my general areas of interest,

• Measurement and modeling of the complex parameters associated with a direct dynamics model of the human musculo-skeletal system, with the aim of examining the role, function, and co-ordination of muscle in vivo. 

• Investigation of human impacts, with emphasis on quantifying the effect of the "wobbling" mass on joint loads. 

• Development of improved measurement protocols (three-dimensional photogrammetry, determination of segment position and orientation, data smoothing and differentiation).

• Investigation of procedures for determining body segment inertial parameters.

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Publications

Recent publications include,

Muri, J., Winter, S.L., and Challis, J.H. (2008) Changes in segmental inertial properties with age.  Journal of Biomechanics  41, 1809-1812.

Challis. J.H., and Pain, M.T.G. (2008)  Soft tissue motion influences skeletal loads during impacts.  Exercise and Sports Science Reviews  36, 71-75.

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, 337-341.

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, 213-217.

For other publications search PubMed for John H Challis (click name for link).

Courses Taught

FALL COURSES

        Experimental Methods in Biomechanics and Motor Control (KINES 575)

SPRING COURSES

        Biomechanics (KINES 384)

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Last Modified: 01-JULY-2008