Development of a Close-Fitting Assistive Suit with Adjustable Structure for Arm and Back as Needed - e.z.UP®

Yun Ting Liao*, Toshifumi Ishioka, Kazuko Mishima, Chiaki Kanda, Kenji Kodama, Eiichiro Tanaka

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


The muscle injuries of manual handling workers, caused by the repeated motion and heavy load in the daily tasks, strongly influence their quality of life. To prevent muscle injuries in many occupations, a close-fitting assistive suit weighing 0.75 [kg] with the passive actuation mechanism and adjustable structures is proposed to assist not only the back muscle but the arm muscle of manual handling workers according to the user intention. An experiment with electromyography for measuring the muscle activities is conducted with six subjects to practically confirm the effectiveness of the suit. The experimental results revealed and proved that the proposed suit can successfully and appropriately assist not only the arm but also the back muscle with a lifting-up motion, simultaneously.

Original languageEnglish
Title of host publicationMechanisms and Machine Science
PublisherSpringer Netherlands
Number of pages9
Publication statusPublished - 2020

Publication series

NameMechanisms and Machine Science
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992


  • Arm assistance
  • Back assistance
  • Close-fitting assistive suit
  • Electromyography
  • Passive actuation mechanism

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering


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