Reducing energy consumption during walking is a critical goal for transtibial amputees. The
study presents the evaluation of a semi-active prosthesis with five transtibial amputees. The …

Passive ankle-foot prostheses are light-weighted and reliable, but they cannot generate net
positive power, which is essential in restoring the natural gait pattern of amputees. Recent …

Passive-elastic foot prostheses cannot produce net work. Consequently, passive-elastic foot
prostheses are limited in their ability to enable a biologically-realistic gait pattern in …

The human ankle provides a significant amount of net positive work during the stance period
of walking, especially at moderate to fast walking speeds. On the contrary, conventional …

Transtibial (TT) amputations, or below-knee amputations, are among the most frequently
performed major limb removals. To replace the missing limb, numerous prosthetic devices …

This paper presents the mechanical design, control scheme, and clinical evaluation of a
novel, motorized ankle-foot prosthesis, called MIT Powered Ankle-Foot Prosthesis. Unlike a …

Most existing transtibial prostheses are energetically passive. Amputees using passive
prostheses exhibit asymmetrical gait patterns [1], consume more metabolic energy [2–3] …

The lack of functional ankle musculature in lower limb amputees contributes to the reduced
prosthetic ankle push-off, compensations at other joints and more energetically costly gait …

At moderate to fast walking speeds, the human ankle provides net positive work at high-
mechanical-power output to propel the body upward and forward during the stance period …

Most existing transtibial prostheses are energetically passive. Their ankle joints are either
rigid or rotatable in a limited range, and their feet are single-segment structures without toe …