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Leg stiffness in unilateral transfemoral amputees across a range of running speeds
by
Hobara, Hiroaki
, Sakata, Hiroyuki
, Kobayashi, Yoshiyuki
, Hashizume, Satoru
in
Adult
/ Algorithms
/ Amputation
/ Amputee locomotion
/ Amputees
/ Artificial Limbs
/ Biomechanical Phenomena
/ Bouncing gait
/ Carbon fibers
/ Compression
/ Femur - surgery
/ Fitness equipment
/ Humans
/ Leg
/ Leg - physiology
/ Limbs
/ Male
/ Mechanical Phenomena
/ Prostheses
/ Prosthetics
/ Running
/ Running-specific prosthesis
/ Spring-mass model
/ Stiffness
/ Studies
/ Track & field
/ Trans-femoral amputees
/ Vertical forces
2019
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Leg stiffness in unilateral transfemoral amputees across a range of running speeds
by
Hobara, Hiroaki
, Sakata, Hiroyuki
, Kobayashi, Yoshiyuki
, Hashizume, Satoru
in
Adult
/ Algorithms
/ Amputation
/ Amputee locomotion
/ Amputees
/ Artificial Limbs
/ Biomechanical Phenomena
/ Bouncing gait
/ Carbon fibers
/ Compression
/ Femur - surgery
/ Fitness equipment
/ Humans
/ Leg
/ Leg - physiology
/ Limbs
/ Male
/ Mechanical Phenomena
/ Prostheses
/ Prosthetics
/ Running
/ Running-specific prosthesis
/ Spring-mass model
/ Stiffness
/ Studies
/ Track & field
/ Trans-femoral amputees
/ Vertical forces
2019
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Leg stiffness in unilateral transfemoral amputees across a range of running speeds
by
Hobara, Hiroaki
, Sakata, Hiroyuki
, Kobayashi, Yoshiyuki
, Hashizume, Satoru
in
Adult
/ Algorithms
/ Amputation
/ Amputee locomotion
/ Amputees
/ Artificial Limbs
/ Biomechanical Phenomena
/ Bouncing gait
/ Carbon fibers
/ Compression
/ Femur - surgery
/ Fitness equipment
/ Humans
/ Leg
/ Leg - physiology
/ Limbs
/ Male
/ Mechanical Phenomena
/ Prostheses
/ Prosthetics
/ Running
/ Running-specific prosthesis
/ Spring-mass model
/ Stiffness
/ Studies
/ Track & field
/ Trans-femoral amputees
/ Vertical forces
2019
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Leg stiffness in unilateral transfemoral amputees across a range of running speeds
Journal Article
Leg stiffness in unilateral transfemoral amputees across a range of running speeds
2019
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Overview
Carbon fiber running-specific prostheses have allowed lower extremity amputees to participate in running activity by providing spring-like properties in their affected limb. It has been established that as running speed increases, stiffness of the leg spring (leg stiffness; kleg) remains constant in non-amputees. Although a better understanding of kleg regulation may be helpful for the development of spring-based prostheses, little is known about stiffness regulation in unilateral transfemoral amputees. The aim of this study was to investigate stiffness regulation at different running speeds in unilateral transfemoral amputees wearing a running-specific prosthesis. Nine unilateral transfemoral amputees performed running on an instrumented treadmill across a range of speeds (30, 40, 50, 60, and 70% of their maximum running speed). Using a spring-mass model, kleg was calculated as the ratio of maximal vertical ground reaction force to maximum leg compression during the stance phase in both affected and unaffected limbs. We found a decrease in kleg from the slower speed to 70% speed for the affected limb, whereas no change was present in the unaffected limb. Specifically, there was a significant differences in the kleg between 30% and 70%, 40% and 70%, and 50% and 70%, and the magnitude of the kleg difference between affected and unaffected limbs varied with variations in running speeds in unilateral TFAs with an RSP. These results suggest the kleg regulation strategy of unilateral transfemoral amputees is not the same in the affected and unaffected limbs across a range of running speeds.
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