Metabolic cost and mechanical work during walking after tibiotalar arthrodesis and the influence of footwear

Engelen, S.J.P.M. van; Wajer, Quirine E.; Plaat, Laurens W. van der; Doets, H. Cornelis; Dijk, C. Niek van; Houdijk, Han

doi:10.1016/j.clinbiomech.2010.05.008

Cited by 34 publications

(34 citation statements)

References 25 publications

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“…Both the amount and timing of push-off appear important for energy economy, as also suggested by studies of ankle fusion (Doets et al, 2009;van Engelen et al, 2010), ankle exoskeletons (Malcolm et al, 2013;Sawicki and Ferris, 2008), ankle orthoses (Bregman et al, 2011) and lower limb prosthetics (Collins and Kuo, 2010;Zelik et al, 2011). If push-off cannot be restored, an alternative is to reduce the collision loss, for example with arc-shaped foot bottoms (Adamczyk and Kuo, 2013;Adamczyk et al, 2006;Vanderpool et al, 2008;van Engelen et al, 2010). Such interventions might help to mitigate the disadvantages of impaired ankle strength or power.…”

Section: Discussionmentioning

confidence: 99%

“…Its importance is illustrated by cases of impaired or reduced push-off, which generally require considerably more metabolic energy expenditure to walk at the same speed (Doets et al, 2009;van Engelen et al, 2010;Waters and Mulroy, 1999). If walking were only a matter of supplying a requisite amount of forward propulsion, then other joints might be expected to supply a greater proportion of the mechanical work to offset reduced push-off work, and not necessarily at higher metabolic cost.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and energetic consequences of reduced ankle plantarflexion in human walking

Huang

Shorter

Adamczyk

et al. 2015

Journal of Experimental Biology

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The human ankle produces a large burst of 'push-off' mechanical power late in the stance phase of walking, reduction of which leads to considerably poorer energy economy. It is, however, uncertain whether the energetic penalty results from poorer efficiency when the other leg joints substitute for the ankle's push-off work, or from a higher overall demand for work due to some fundamental feature of push-off. Here, we show that greater metabolic energy expenditure is indeed explained by a greater demand for work. This is predicted by a simple model of walking on pendulum-like legs, because proper push-off reduces collision losses from the leading leg. We tested this by experimentally restricting ankle push-off bilaterally in healthy adults (N=8) walking on a treadmill at 1.4 m s −1 , using ankle-foot orthoses with steel cables limiting motion. These produced up to ∼50% reduction in ankle pushoff power and work, resulting in up to ∼50% greater net metabolic power expenditure to walk at the same speed. For each 1 J reduction in ankle work, we observed 0.6 J more dissipative collision work by the other leg, 1.3 J more positive work from the leg joints overall, and 3.94 J more metabolic energy expended. Loss of ankle push-off required more positive work elsewhere to maintain walking speed; this additional work was performed by the knee, apparently at reasonably high efficiency. Ankle push-off may contribute to walking economy by reducing dissipative collision losses and thus overall work demand.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical and energetic consequences of reduced ankle plantarflexion in human walking

Huang

Shorter

Adamczyk

et al. 2015

Journal of Experimental Biology

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“…There are both positive [10] and negative [9] reports that rollover footwear increase the energy cost of ambulation. However, previous studies have controlled walking speed, a strong determinant of metabolic cost, and perhaps removed the real world effects of the footwear.…”

Section: Introductionmentioning

confidence: 91%

“…To date, however, the literature has generally focussed on how separate aspects of gait are affected e.g. kinematics and kinetics [1][2][3][4], or plantar pressure [5,6], or EMG [7,8], or energy cost [9,10], but not how changes in one data might relate to changes in other data. Thus, it is not clear what kinematic or EMG changes occurred when changes in metabolic cost of walking were observed [9,10].…”

Section: Introductionmentioning

confidence: 99%

Rollover footwear affects lower limb biomechanics during walking

et al. 2014

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“…influence the motor patterns of lower limbs, causing distinct changes of gait kinematics and muscle activity [17,18,19]. Based on previous studies, the main function of unstable shoes is increasing lower limb muscle strength and coordination, enhancing postural control, reducing perceived pain level, and rehabilitating lower limb and lower back injuries [4,17,18,[20][21][22][23][24][25]. It has been reported that unstable shoes (MBT) reduce joint pain through effective shock absorption for people with knee osteoarthritis and increase static balance [26].…”

Section: Introductionmentioning

confidence: 99%

Movement Analysis of Lower Limb During Backward Walking with Unstable Intervention

Shu

Mei

et al. 2016

J. Med. Biol. Eng.

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Movement analysis of lower limb during backward walking with unstable interventionhttp://researchonline.ljmu.ac.uk/4190/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Users may download and/or print one copy of any article(s) in LJMU Research Online to facilitate their private study or for non-commercial research. You may not engage in further distribution of the material or use it for any profit-making activities or any commercial gain.The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription. LJMU Research Online ABSTRACTBackward walking (BW), an emerging rehabilitative and training modality, was integrated with unstable sole construction with various hardness levels to analyze the kinematic and kinetic characteristics of the lower extremities. Eighteen participants volunteered to participate in the test. They performed walking tests under three conditions: 1) BW with normal shoes (NBW); 2) BW with unstable shoes with soft unstable elements (UBW-S); 3) BW with unstable shoes with hard unstable elements (UBW-H). The results show increased hip and ankle flexion and increased knee flexion-extension extent in the stance phase during BW with unstable shoes. The motor control mechanism of unstable BW enhanced the rehabilitation of lower limb deficiency. The attached unstable elements (UBW-S and UBW-H) induced local perturbation to stimulate proprioceptive ability and the neuromuscular system, changing the plantar loading distribution in a certain region. Future study should concentrate on the possible rehabilitative effect of unstable BW on neurological disorders and motor system deficiency.

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Metabolic cost and mechanical work during walking after tibiotalar arthrodesis and the influence of footwear

Cited by 34 publications

References 25 publications

Mechanical and energetic consequences of reduced ankle plantarflexion in human walking

Mechanical and energetic consequences of reduced ankle plantarflexion in human walking

Rollover footwear affects lower limb biomechanics during walking

Movement Analysis of Lower Limb During Backward Walking with Unstable Intervention

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