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Based on the analytical result of a worker\u2019s position model, the proposed device adopts a scheme to push the chest of the user as an appropriate assistive method. Additionally, the analytical result shows that a reduction in weight of the device is also important for decreasing the load on the lower back. Based on these results, we prototyped a lightweight semi-crouching assistive device that can generate sufficient assistive force via a pneumatic artificial muscle, which has high power to weight ratio. This device was experimentally evaluated via electromyogram of the erector spine when the user maintains a semi-crouching position. The experimental results confirmed the usefulness of this device.<\/jats:p>","DOI":"10.20965\/jrm.2020.p0885","type":"journal-article","created":{"date-parts":[[2020,10,20]],"date-time":"2020-10-20T00:46:00Z","timestamp":1603154760000},"page":"885-893","source":"Crossref","is-referenced-by-count":6,"title":["Development of Semi-Crouching Assistive Device Using Pneumatic Artificial Muscle"],"prefix":"10.20965","volume":"32","author":[{"given":"Naoki","family":"Saito","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daisuke","family":"Furukawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toshiyuki","family":"Satoh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Norihiko","family":"Saga","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"name":"Department of Intelligent Mechatronics, Akita Prefectural University 84-4 Ebinokuchi, Tsuchiya, Yurihonjo, Akita 015-0055, Japan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"name":"Department of Intelligent Mechatronics, Akita Prefectural University 84-4 Ebinokuchi, Tsuchiya, Yurihonjo, Akita 015-0055, Japan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"name":"Department of Human System Engineering, Kwansei Gakuin University 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"8550","published-online":{"date-parts":[[2020,10,20]]},"reference":[{"key":"key-10.20965\/jrm.2020.p0885-1","unstructured":"Y. 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