Biomechanical study of the musculoskeletal impact of the Japet.W exoskeleton

This study aims at evaluating the physiological and biomechanical impact of the Japet.W exoskeleton on the whole body.


The context

The purpose of this research is to assess effect of the Japet.W exoskeleton on the entire body, both physiologicaly and biomechanicaly. This study takes place within the framework of a thesis in collaboration between the UTC and Japet Medical.

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The approach

Each subject performs several tasks with and without the exoskeleton to measure the impact of the exoskeleton on the human body.

The tasks performed are the following:

  • Carrying a load
  • Retrieving a cardboard box located on the ground and standing up with it,
  • Walking with and without carrying a load.



The subject will be equipped with various sensors:

  • Reflective markers, placed on the whole body, which will allow to capture the movements with infrared cameras and thus obtain the positions of the markers in space,
  • Inertial computers, placed on the trunk, which give data on the acceleration and rotation speed of the torso,
  • Electromyogram (EMG), allowing to evaluate the muscular impact of the device on the lower back,
  • Gas exchange analysis system, which will allow to measure the oxygen consumption during a task,
  • Cardiofrequency meter, allowing to evaluate the heart rate


Expected results

From the data obtained, we can observe the influence of the exoskeleton on:

  • The movement: the amplitude of the gesture (with angles) and the speed of execution,
  • The muscular activity of the muscles of the lower back: we try to see if the exoskeleton has an influence on it,
  • The energy cost: variation of oxygen consumption and heart rate,
  • The skeleton: straightening of the spine (reduction of the lordosis).


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