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The effect of localized muscle fatig...

Flynn, Janice Marie.

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The effect of localized muscle fatigue on tibial impact acceleration.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The effect of localized muscle fatigue on tibial impact acceleration./
作者:	Flynn, Janice Marie.
面頁冊數:	92 p.
附註:	Source: Masters Abstracts International, Volume: 42-03, page: 0986.
Contained By:	Masters Abstracts International42-03.
標題:	Engineering, Biomedical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ84585
ISBN:	0612845850

The effect of localized muscle fatigue on tibial impact acceleration.
Flynn, Janice Marie.

The effect of localized muscle fatigue on tibial impact acceleration. - 92 p.

Source: Masters Abstracts International, Volume: 42-03, page: 0986.

Thesis (M.H.K.)--University of Windsor (Canada), 2003.

Tibial impact acceleration measured during running is known to increase with general body fatigue. The purpose of this study was to determine if localized muscle fatigue of the shank muscles would also cause an increase in peak tibial acceleration. The human pendulum system was used to control impact velocity and joint angle. There were 24 women participating in the study: 12 between the ages of 20--25, and 12 between 50--60 years. Each lay supine on the pendulum, and their unshod dominant heel was impacted into a vertical force plate with a velocity between 1--1.15 m/s, and a force approximating 1.8--2.8 x body weight. A uni-axial accelerometer at the tibial tubercle measured peak tibial acceleration, time to peak acceleration and the slope of the acceleration/time curve. EMG activity of the tibialis anterior and gastrocnemius was used to define and monitor fatigue. The dorsiflexors and plantarflexors were fatigued on two separate days, at least a week apart. Statistical analysis revealed a significant decrease in peak acceleration and acceleration slope following fatigue. There were no significant main effects or interactions for age group or muscle group. In conclusion, localized muscle fatigue of the dorsiflexors or plantarflexors resulted in a significant decrease in the peak acceleration and acceleration slope measured at the knee, which is opposite to the effect of general body fatigue.

ISBN: 0612845850Subjects--Topical Terms:

1017684
Engineering, Biomedical.

The effect of localized muscle fatigue on tibial impact acceleration.
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520 $a Tibial impact acceleration measured during running is known to increase with general body fatigue. The purpose of this study was to determine if localized muscle fatigue of the shank muscles would also cause an increase in peak tibial acceleration. The human pendulum system was used to control impact velocity and joint angle. There were 24 women participating in the study: 12 between the ages of 20--25, and 12 between 50--60 years. Each lay supine on the pendulum, and their unshod dominant heel was impacted into a vertical force plate with a velocity between 1--1.15 m/s, and a force approximating 1.8--2.8 x body weight. A uni-axial accelerometer at the tibial tubercle measured peak tibial acceleration, time to peak acceleration and the slope of the acceleration/time curve. EMG activity of the tibialis anterior and gastrocnemius was used to define and monitor fatigue. The dorsiflexors and plantarflexors were fatigued on two separate days, at least a week apart. Statistical analysis revealed a significant decrease in peak acceleration and acceleration slope following fatigue. There were no significant main effects or interactions for age group or muscle group. In conclusion, localized muscle fatigue of the dorsiflexors or plantarflexors resulted in a significant decrease in the peak acceleration and acceleration slope measured at the knee, which is opposite to the effect of general body fatigue.
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