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Energetics and biomechanics of walke...

Priebe, Jonathon R.

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Energetics and biomechanics of walker assisted gait.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Energetics and biomechanics of walker assisted gait./
作者:	Priebe, Jonathon R.
面頁冊數:	37 p.
附註:	Adviser: Rodger Kram.
Contained By:	Masters Abstracts International45-05.
標題:	Biology, Physiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1442958

Energetics and biomechanics of walker assisted gait.
Priebe, Jonathon R.

Energetics and biomechanics of walker assisted gait. - 37 p.

Adviser: Rodger Kram.

Thesis (M.S.)--University of Colorado at Boulder, 2007.

Conclusions. Three principle factors contribute to the greatly elevated metabolic cost of using a 4F walker: slow speed, lifting the walker, and the step-to gait.Subjects--Topical Terms:

1017816
Biology, Physiology.

Energetics and biomechanics of walker assisted gait.
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245 1 0 $a Energetics and biomechanics of walker assisted gait.
300 $a 37 p.
500 $a Adviser: Rodger Kram.
500 $a Source: Masters Abstracts International, Volume: 45-05, page: 2373.
502 $a Thesis (M.S.)--University of Colorado at Boulder, 2007.
520 $a Conclusions. Three principle factors contribute to the greatly elevated metabolic cost of using a 4F walker: slow speed, lifting the walker, and the step-to gait.
520 $a Introduction. The purpose of this study was to investigate the energetic cost, biomechanics, and kinematics of walking unassisted, with three different walkers (four-wheeled, 4W; two-wheeled, 2W; four-footed, 4F), and two different stride patterns (bipedal, BP; step-to, ST). I tested two hypotheses: (1) at a fixed speed, walking with a 4F walker, using a ST gait is metabolically more expensive than walking unassisted or with a 2W or 4W walker and (2) the greater cost of using a 4F walker is due to the slower walking speed, cost of lifting the walker, and a disabled inverted-pendulum energy exchange mechanism associated with the step-to gait.
520 $a Methods. Ten (5M, 5F) young, healthy, adult subjects volunteered. I trained the subjects to walk with the three walkers and the ST gait. After training, I measured metabolic rate using expired gas analysis, video kinematics, and ground reaction forces while walking over a force sensing treadmill.
520 $a Results. The net metabolic cost for subjects walking with the 4F walker at 0.30m/s was "only" 84% greater than bipedal (BP) walking at the same speed (p<0.001), much less then 212% reported in the literature. Metabolic cost with the 4W and 2W walkers was just 3% and 10% greater than BP walking at the same speed; respectively. Net metabolic power for walking at 0.30 m/s with the 4F walker was not statistically different from the combined metabolic rates for ST walking at 0.30 m/s plus the cost of 4F walker lifting.
520 $a Discussion. Three principle factors contribute to the greatly elevated metabolic cost of using a 4F walker: slow speed, lifting, and the step-to gait. The 4F walker involves a dramatically slower preferred walking speed (4F 0.35m/s vs. BP 1.52m/s). The metabolic cost of bipedal walking at 0.30m/s increased metabolic cost per distance by 73% compared to walking bipedally at 1.25m/s. Lifting the 4F walker comprised 25% of the metabolic rate when using the 4F walker.
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650 4 $a Health Sciences, Recreation. $3 1018003
650 4 $a Health Sciences, Rehabilitation and Therapy. $3 1017926
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