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Quantification of push-off and collision work during step-to-step transition in amputees walking at self-selected speed: Effect of amputation level
by
Paysant, J.
, Sedran, L.
, Pillet, H.
, Thomas-Pohl, M.
, Loiret, I.
, Martinet, N.
, Bonnet, X.
in
Amputation
/ Amputation, Surgical
/ Amputees
/ Ankle
/ Artificial Limbs
/ Biomechanical Phenomena
/ Biomechanics
/ Feet
/ Gait
/ Humans
/ Literature reviews
/ Locomotion
/ Mechanical work
/ Metabolism
/ Prostheses
/ Prosthesis Design
/ Retrospective Studies
/ Step-to-step transition
/ Trans-femoral amputees
/ Transfemoral amputees
/ Transtibial amputees
/ Velocity
/ Walking
2024
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Quantification of push-off and collision work during step-to-step transition in amputees walking at self-selected speed: Effect of amputation level
by
Paysant, J.
, Sedran, L.
, Pillet, H.
, Thomas-Pohl, M.
, Loiret, I.
, Martinet, N.
, Bonnet, X.
in
Amputation
/ Amputation, Surgical
/ Amputees
/ Ankle
/ Artificial Limbs
/ Biomechanical Phenomena
/ Biomechanics
/ Feet
/ Gait
/ Humans
/ Literature reviews
/ Locomotion
/ Mechanical work
/ Metabolism
/ Prostheses
/ Prosthesis Design
/ Retrospective Studies
/ Step-to-step transition
/ Trans-femoral amputees
/ Transfemoral amputees
/ Transtibial amputees
/ Velocity
/ Walking
2024
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Quantification of push-off and collision work during step-to-step transition in amputees walking at self-selected speed: Effect of amputation level
by
Paysant, J.
, Sedran, L.
, Pillet, H.
, Thomas-Pohl, M.
, Loiret, I.
, Martinet, N.
, Bonnet, X.
in
Amputation
/ Amputation, Surgical
/ Amputees
/ Ankle
/ Artificial Limbs
/ Biomechanical Phenomena
/ Biomechanics
/ Feet
/ Gait
/ Humans
/ Literature reviews
/ Locomotion
/ Mechanical work
/ Metabolism
/ Prostheses
/ Prosthesis Design
/ Retrospective Studies
/ Step-to-step transition
/ Trans-femoral amputees
/ Transfemoral amputees
/ Transtibial amputees
/ Velocity
/ Walking
2024
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Quantification of push-off and collision work during step-to-step transition in amputees walking at self-selected speed: Effect of amputation level
Journal Article
Quantification of push-off and collision work during step-to-step transition in amputees walking at self-selected speed: Effect of amputation level
2024
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Overview
Maintaining forward walking during human locomotion requires mechanical joint work, mainly provided by the ankle–foot in non-amputees. In lower-limb amputees, their metabolic overconsumption is generally attributed to reduced propulsion. However, it remains unclear how altered walking patterns resulting from amputation affect energy exchange. The purpose of this retrospective study was to investigate the impact of self-selected walking speed (SSWS) on mechanical works generated by the ankle–foot and by the entire lower limbs depending on the level of amputation. 155 participants, including 47 non-amputees (NAs), 40 unilateral transtibial amputees (TTs) and 68 unilateral transfemoral amputees (TFs), walked at their SSWS. Positive push-off work done by the trailing limb (WStS+) and its associated ankle–foot (Wankle-foot+), as well as negative collision work done by the leading limb (WStS-) were analysed during the transition from prosthetic limb to contralateral limb. An ANCOVA was performed to assess the effect of amputation level on mechanical works, while controlling for SSWS effect. After adjusting for SSWS, NAs produce more push-off work with both their biological ankle–foot and trailing limb than amputees do on prosthetic side. Using the same type of prosthetic feet, TTs and TFs can generate the same amount of prosthetic Wankle-foot+, while prosthetic WStS+ is significantly higher for TTs and remains constant with SSWS for TFs. Surprisingly and contrary to theoretical expectations, the lack of propulsion at TFs’ prosthetic limb did not affect their contralateral WStS-, for which a difference is significant only between NAs and TTs. Further studies should investigate the relationship between the TFs' inability to increase prosthetic limb push-off work and metabolic expenditure.
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