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netizens

The new device will sustain bodyweight, decrease stress on the knees and allow people get up steps and crouch.

http://www.redorbit.com/news/technology/1598747/honda_reveals_new_assisted_walking_device/

toeslayer

 

Genu recruvatum anyone.

The device is placed in such a position to produce a hip extension moment. A hip extension moment will power gait during stance phase. However, there still needs to sufficient knee flexion moment to prevent recruvatum.

The blurb mentioned something about assisting rising from squat. Yes, a hip extension moment will help that if the body is positioned correctly. A hip extension moment will also tend to tilt the trunk backwards. The trunk will then have to be tilted forward enough at the initiation of the the hip extension moment so that at the end of stance phase the trunk is not to far posterior to the hip joint.

To demonstrate the point, palpate your quads as you rise from a squat with your weight on your heels versus your weight on the ball of your foot. When using your quads to rise from a squat the trunk will be rotated forward. When using your gluteals (hip extensors) the trunk will rotate backward. So, which muscle group used will depend on maintaining balance. The device could make you fall on your butt, if you did not position your center of mass appropriately.

Cheers,

Eric Fuller