Biomechanical determinants of pedaling energetics: internal and external work are not independent.
نویسندگان
چکیده
Simulation analyses of pedaling demonstrate how individual muscle forces act to accelerate and decelerate the leg segments and the crank to perform external work. The work done by the muscles to accelerate the leg segments ultimately drives the pedals because when the legs decelerate, their mechanical energy is used to overcome the external load.
منابع مشابه
Muscle contributions to specific biomechanical functions do not change in forward versus backward pedaling.
Previous work had identified six biomechanical functions that need to be executed by each limb in order to produce a variety of pedaling tasks. The functions can be organized into three antagonistic pairs: an Ext/Flex pair that accelerates the foot into extension or flexion with respect to the pelvis, an Ant/Post pair that accelerates the foot anteriorly or posteriorly with respect to the pelvi...
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متن کاملFunctional roles of the leg muscles when pedaling in the recumbent versus the upright position.
An understanding of the coordination of the leg muscles in recumbent pedaling would be useful to the design of rehabilitative pedaling exercises. The objectives of this work were to (i) determine whether patterns of muscle activity while pedaling in the recumbent and upright positions are similar when the different orientation in the gravity field is considered, (ii) compare the functional role...
متن کاملPhase reversal of biomechanical functions and muscle activity in backward pedaling.
Computer simulations of pedaling have shown that a wide range of pedaling tasks can be performed if each limb has the capability of executing six biomechanical functions, which are arranged into three pairs of alternating antagonistic functions. An Ext/Flex pair accelerates the limb into extension or flexion, a Plant/Dorsi pair accelerates the foot into plantarflexion or dorsiflexion, and an An...
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ورودعنوان ژورنال:
- Exercise and sport sciences reviews
دوره 30 4 شماره
صفحات -
تاریخ انتشار 2002