Increasing ankle push-off work with a powered prosthesis does not necessarily reduce metabolic rate for transtibial amputees
نویسندگان
چکیده
منابع مشابه
Increasing ankle push-off work with a powered prosthesis does not necessarily reduce metabolic rate for transtibial amputees.
Amputees using passive ankle-foot prostheses tend to expend more metabolic energy during walking than non-amputees, and reducing this cost has been a central motivation for the development of active ankle-foot prostheses. Increased push-off work at the end of stance has been proposed as a way to reduce metabolic energy use, but the effects of push-off work have not been tested in isolation. In ...
متن کاملProsthetic ankle push-off work reduces metabolic rate but not collision work in non-amputee walking
Individuals with unilateral below-knee amputation expend more energy than non-amputees during walking and exhibit reduced push-off work and increased hip work in the affected limb. Simple dynamic models of walking suggest a possible solution, predicting that increasing prosthetic ankle push-off should decrease leading limb collision, thereby reducing overall energy requirements. We conducted a ...
متن کاملPassive Ankle-Foot Prosthesis Prototype with Extended Push-Off
Current commercially available prosthetic feet have succeeded in decreasing the metabolic cost and increasing the speed of walking compared to walking with conventional, mostly solid prosthetic feet. However, there is still a large discrepancy when compared with a non‐disabled gait, and the walking pattern remains strongly disturbed. During the stance phase of the leg, t...
متن کاملIndividual Leg and Joint Work during Sloped Walking for People with a Transtibial Amputation Using Passive and Powered Prostheses
People with a transtibial amputation using passive-elastic prostheses exhibit reduced prosthetic ankle power and push-off work compared to non-amputees and compensate by increasing their affected leg (AL) hip joint work and unaffected leg (UL) ankle, knee, and hip joint and leg work during level-ground walking. Use of a powered ankle–foot prosthesis normalizes step-to-step transition work durin...
متن کاملWithin-socket myoelectric prediction of continuous ankle kinematics for control of a powered transtibial prosthesis.
OBJECTIVE Powered robotic prostheses create a need for natural-feeling user interfaces and robust control schemes. Here, we examined the ability of a nonlinear autoregressive model to continuously map the kinematics of a transtibial prosthesis and electromyographic (EMG) activity recorded within socket to the future estimates of the prosthetic ankle angle in three transtibial amputees. APPROA...
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ژورنال
عنوان ژورنال: Journal of Biomechanics
سال: 2016
ISSN: 0021-9290
DOI: 10.1016/j.jbiomech.2016.09.015