Energy cost of walking of amputees

Rl, Waters; Perry, Jacquelin; Antonelli, Daniel; Hislop, Helen J.

doi:10.2106/00004623-197658010-00007

Cited by 792 publications

(86 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous investigations using a knee prosthesis providing positive power at late stance, flexion, and swing extension showed reductions in MCOT of 6.8 percent, similar to that observed in this work [25]. The reductions, while significant, are not as dramatic as those seen while using a powered ankle because the knee is not as involved in providing motive power as the ankle or hip [11,14,31]. From Figure 2, it can be seen that there are distinct differences in metabolic effects while using the VI Knee compared with a C-Leg; individuals with shorter residual limbs showed a reduction in MCOT and those with longer limbs an increase in metabolic cost-a trend seen at both the lower and, to a lesser extent, the higher speed.…”

Section: Discussionsupporting

confidence: 85%

“…From Figure 2, it can be seen that there are distinct differences in metabolic effects while using the VI Knee compared with a C-Leg; individuals with shorter residual limbs showed a reduction in MCOT and those with longer limbs an increase in metabolic cost-a trend seen at both the lower and, to a lesser extent, the higher speed. While it has been shown previously that residual limb length can have a significant effect on gait [14,32], a better understanding of the effects of limb length on MCOT performance while using the VI Knee is presented in the two tables of correlated gait measures.…”

Section: Discussionmentioning

confidence: 99%

“…at the higher speed is determined primarily by the amount of hip hiking and the resultant rise in the COM, with less effect caused by residual limb length [14].…”

Section: Gaitmentioning

confidence: 99%

“…In general, those with shorter residual limbs have overall less lever arm with which to propel the body and weaker hip stabilizers, resulting in greater deviation from nonpathologic gait [7,[12][13]. This leads shorter-limbed people with transfemoral amputation to walk slower in order to minimize their energy expenditure [14][15].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Metabolic effects of using a variable impedance prosthetic knee

2016

View full text Add to dashboard Cite

Abstract-A transfemoral amputation has a significant effect on walking. Though current prosthetic knee options serve to restore mobility, as purely passive devices, they do not fully restore nondisabled gait. Persons with transfemoral amputation incur a higher metabolic cost during walking than persons without amputation and as a result walk slower and for shorter distances before tiring. An original variable-impedance transmission prosthetic knee (VI Knee) was tested in five study participants with unilateral transfemoral amputation at two steadystate walking speeds, one below and one above their preferred walking speed. While walking with the VI Knee, participants with shorter limbs showed a reduction in metabolic cost compared with their conventional C-Leg prosthesis, while those with longer limbs exhibited an increase. Though differences were observed between speeds, overall the difference in metabolic cost (reduction or increase) was found to correlate significantly with rise in the center of mass, with those with shorter residual limbs exhibiting less overall lifting of the body during gait.

show abstract

Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

“…at the higher speed is determined primarily by the amount of hip hiking and the resultant rise in the COM, with less effect caused by residual limb length [14].…”

Section: Gaitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Metabolic effects of using a variable impedance prosthetic knee

2016

View full text Add to dashboard Cite

show abstract

“…An increase of functionality is required in gait flexibility or stair climbing for example [1], [4], [5]. At the same time, users might not be satisfied with their prosthesis, since they experience gait as being directed by the prosthesis [5], need to learn specific gait strategies [5], [6] or have an higher metabolic effort than persons without amputation [7]. To cope with this situation users could be involved in every step of prosthetic development.…”

Section: Introductionmentioning

confidence: 99%

Conception and Design of a Hardware Simulator for Restoring Lost Biomechanical Function

Beckerle

Lahnstein

Wojtusch

et al. 2013

2013 IEEE International Conference on Systems, Man, and Cybernetics

View full text Add to dashboard Cite

Abstract-The Prosthesis-User-in-the-Loop simulator concept represents an approach to integrate users to prosthetic development by a holistic simulation of gait with a prosthesis. It aims at a more user-centered design of lower limb prosthetic devices by utilizing user experience and assessment. As this requires a complex mechanical robot design and sophisticated control strategies that allow for restoring lost biomechanical function, this paper presents the conception and design of a hardware simulator for proof-of-concept studies of those issues. For those investigations, the ankle joints of healthy praticpants are locked mechanically to induce a temporary disability. The task of the simulator is to provide a simulation of physiological gait by artificially restoring ankle functionality. Therefore, the biodynamic behaviour of the locked ankle joint and the enviroment have to be mimicked mechnically. After introducing ProsthesisUser-in-the-Loop simulator idea, the conception of a proof-ofconcept simulator is presented. From this, an analytical model is derived and inverse dynamics simulation are used for design. The resulting mechanism is limited to sagittal plane movements and thus has three degrees of freedom. The actuators are dimensioned to meet the requirements of walking motions in the human subject with maximum body height among the test population.

show abstract

Human Motion Analysis

Abu‐Faraj

Harris

Smith

et al. 1999

Wiley Encyclopedia of Electrical and Electronics Engineering

View full text Add to dashboard Cite

The sections in this article are Evolution of Human Motion Analysis Anatomic Terminology The Cyclic Nature of Gait Stride and Temporal Gait Parameters Gait Analysis Methodologies Accuracy and Reliability of Motion Analysis Systems Biomechanical Modeling of Gait Data Ground Reaction Forces and Plantar Pressures Kinematics Kinetics Dynamic Electromyography Energy Expenditure Interpretation and Decision Making Future Trends in Gait Analysis Acknowledgments

show abstract

Energy cost of walking of amputees

Cited by 792 publications

References 6 publications

Metabolic effects of using a variable impedance prosthetic knee

Metabolic effects of using a variable impedance prosthetic knee

Conception and Design of a Hardware Simulator for Restoring Lost Biomechanical Function

Human Motion Analysis

Contact Info

Product

Resources

About