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Usefulness of chair stand time as a surrogate of gait speed in diagnosing sarcopenia

conform to the definitions of the European Working Group on Sarcopenia in Older People and the Asian Working Group for Sarcopenia, because the purpose of the research is consideration of its usefulness in sarcopenia diagnosis. Fourth, there were mistakes in the description of the height of both sexes, and the weight and BMI of women in Table 1 of reference 1. Female participants could be presumed to be the same as the participants of the Oshima Health Study, which was presented as a reference. We want to ensure that the authors’ interpretation is correct. In addition, the descriptions of the eligibility criteria and the registration methods of the male participants were insufficient. Even if 87 male participants were actually analyzed, the authors should describe the eligibility criteria, and the sources and methods of participant selection. Finally, the height of the chair used for the measurement of chair stand timewas not reported. Thedescription of the chair was only “a standard chair.” The height of the seat surface and the presence or absence of a backrest and armrests were unclear. Chair stand time might change depending on the height of the seat or thematerial of the seat surface. Therefore, to increase the reproducibility of this research, the nature of the chair should be described as in previous research, “A standard chair (with a seat height of 40cm) without a backrest but with armrests was used.” We hope that the authors can address these concerns in order to clarify their findings.