Impact attenuation in older adults

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dc.contributor.author Johnston, Allison
dc.contributor.department Kinesiology
dc.date 2020-06-20T02:34:56.000
dc.date.accessioned 2020-06-30T08:14:42Z
dc.date.available 2020-06-30T08:14:42Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2006
dc.date.issued 2006-01-01
dc.description.abstract <p>Introduction: Running is a common fitness activity that is enjoyed by many older adults. Little research has been done concerning the older adult runner and research into factors that contribute to injury including impact attenuation is important. The purpose of this research was to determine if differences in impact attenuation exist between young and older adult runners. Methods: Young adult (n=8; age: 24.5±3.6 yrs.) and older adult (n=8; age: 68.9±6.3 yrs) runners ran at both a self-selected and a controlled speed of 3.3m/s. An electrogoniometer was used to measure knee angle and accelerometers attached to the head and leg measured accelerations and impact attenuation at a frequency of 1000Hz. Results: Spectral analysis revealed increased leg power and increased head power in the young adult runners. Transfer functions were similar between groups. Impact attenuation was higher for the older adult group in both the preferred and controlled running speed conditions. In the preferred running speed condition young adults ran at a faster speed, exhibited higher peak leg and peak head accelerations, more excursion flexion and contact angle flexion when compared with the older adult group. Peak head and leg acceleration and excursion flexion were also larger in the controlled running speed condition for the young adult group. Discussion: Preferred running speed appears to contribute to altered power spectra and segment acceleration in the older adults. However, other factors requiring further inquiry, contribute even in controlled speed conditions. Leg and head power spectra are altered in older runners with resulting attenuation similar between the two age groups. It appears that maintaining a stable visual field may be a larger priority in the older adult runner.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/19304/
dc.identifier.articleid 20303
dc.identifier.contextkey 18174288
dc.identifier.doi https://doi.org/10.31274/rtd-20200618-16
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/19304
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/73300
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/19304/Johnston_ISU_2006_J648.pdf|||Fri Jan 14 21:54:36 UTC 2022
dc.subject.keywords Health and human performance
dc.subject.keywords Exercise and sport science (Biological basis of physical activity)
dc.subject.keywords Biological basis of physical activity
dc.title Impact attenuation in older adults
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication f7b0f2ca-8e43-4084-8a10-75f62e5199dd
thesis.degree.discipline Exercise and Sport Science (Biological Basis of Physical Activity)
thesis.degree.level thesis
thesis.degree.name Master of Science
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