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This article and any supplementary material should be cited as follows: Schoeman M, Diss CE, Strike SC. Asymmetrical loading demands associated with vertical jump landings in people with unilateral transtibial amputation. J Rehabil Res Dev. 2013;50(10):1435–48. http://dx.doi.org/10.1682/JRRD.2012.10.0199
Slideshow ProjectDOI:10.1682/JRRD.2012.10.0199JSP
Asymmetrical loading demands associated with vertical jump
landings in people with unilateral transtibial amputation
Marlene Schoeman, PhD; Ceri E. Diss, PhD;
Siobhan C. Strike, PhD
This article and any supplementary material should be cited as follows: Schoeman M, Diss CE, Strike SC. Asymmetrical loading demands associated with vertical jump landings in people with unilateral transtibial amputation. J Rehabil Res Dev. 2013;50(10):1435–48. http://dx.doi.org/10.1682/JRRD.2012.10.0199
Slideshow ProjectDOI:10.1682/JRRD.2012.10.0199JSP
• Aim– Assess loading symmetry during vertical jump landings
to determine role of intact and prosthetic limbs in controlling downward momentum of center of mass during landing.
• Relevance– People with transtibial amputation (TTA) are
encouraged to engage in recreation sports for health and mechanical benefits.
– Most recreational sports involve jumping.
This article and any supplementary material should be cited as follows: Schoeman M, Diss CE, Strike SC. Asymmetrical loading demands associated with vertical jump landings in people with unilateral transtibial amputation. J Rehabil Res Dev. 2013;50(10):1435–48. http://dx.doi.org/10.1682/JRRD.2012.10.0199
Slideshow ProjectDOI:10.1682/JRRD.2012.10.0199JSP
Method
• Participants– 6 with unilateral TTA and 10 nondisabled. – Completed 10 maximal vertical jumps.
• Assessment– Contralateral symmetry (Symmetry Index).– Symmetry at group level (Mann-Whitney U Test).
This article and any supplementary material should be cited as follows: Schoeman M, Diss CE, Strike SC. Asymmetrical loading demands associated with vertical jump landings in people with unilateral transtibial amputation. J Rehabil Res Dev. 2013;50(10):1435–48. http://dx.doi.org/10.1682/JRRD.2012.10.0199
Slideshow ProjectDOI:10.1682/JRRD.2012.10.0199JSP
Results• Participants with TTA demonstrated:– Quasi-unilateral landings onto intact limb.
• Due to either incapability of prosthetic ankle to plantar flex or increased residual-limb knee and hip flexion.
– In loading phase, reduced prosthetic-side peak vertical forces, ankle range of motion, extensor moments, and negative work generated.
• Individual asymmetries evident in:– Peak vertical force magnitudes, duration from touchdown to
peak vertical force, ankle joint angles at touchdown, ranges of motion, knee and hip extensor moments, and work done at ankle.
This article and any supplementary material should be cited as follows: Schoeman M, Diss CE, Strike SC. Asymmetrical loading demands associated with vertical jump landings in people with unilateral transtibial amputation. J Rehabil Res Dev. 2013;50(10):1435–48. http://dx.doi.org/10.1682/JRRD.2012.10.0199
Slideshow ProjectDOI:10.1682/JRRD.2012.10.0199JSP
Conclusion
• For people with TTA, there is a potential injury risk associated with landing.– Indicated by their high peak forces from significantly
lower landing heights than nondisabled participants.