Age-related reduction of trunk muscle torque and prevalence of trunk sarcopenia in community-dwelling elderly: Validity of a portable trunk muscle torque measurement instrument and its application to a large sample cohort study

• Eiji Sasaki ,

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: e_sasaki@hirosaki-u.ac.jp

  Affiliations Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan, Department of Social Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

  http://orcid.org/0000-0002-4859-8473

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• Shizuka Sasaki,

  Roles Conceptualization, Data curation, Investigation, Resources, Writing – original draft, Writing – review & editing

  Affiliation Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

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• Daisuke Chiba,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing

  Affiliation Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

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• Yuji Yamamoto,

  Roles Conceptualization, Data curation, Investigation, Writing – original draft, Writing – review & editing

  Affiliation Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

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• Atsushi Nawata,

  Roles Conceptualization, Data curation, Resources, Software, Writing – original draft, Writing – review & editing

  Affiliation Medical Engineering Laboratory, ALCARE Co., Ltd., Tokyo, Japan

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• Eiichi Tsuda,

  Roles Conceptualization, Data curation, Investigation, Methodology, Writing – original draft, Writing – review & editing

  Affiliation Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

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• Shigeyuki Nakaji,

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Project administration, Supervision, Writing – original draft, Writing – review & editing

  Affiliation Department of Social Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

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• Yasuyuki Ishibashi

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  Affiliation Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine, Hirosaki, Japan

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