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J Phys Ther Sci. 2017 Jul;29(7):1181-1185. doi: 10.1589/jpts.29.1181. Epub 2017 Jul 15.

Lower-limb muscle strength according to bodyweight and muscle mass among middle age patients with type 2 diabetes without diabetic neuropathy.

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Research Center for the Health Promotion and Employment Support, Osaka Rosai Hospital, Japan.
Department of Rehabilitation Sciences, Faculty of Allied Health Sciences, Kansai University of Welfare Sciences, Japan.
Central Department of Rehabilitation, Osaka Rosai Hospital, Japan.
Present address: Central Department of Rehabilitation, Chugoku Rosai Hospital, Japan.
Center for Diabetes Mellitus, Osaka Rosai Hospital, Japan.


[Purpose] This study assessed the effects of type 2 diabetes without diabetic polyneuropathy on muscle strength according to body composition in middle age patients. [Subjects and Methods] This study included 45 non-diabetic individuals (control group) and 50 patients with type 2 diabetes (DM group), 40 to 64 years of age. The body composition was examined, including the leg muscle volume (LMV), which was the sum of the lower-limb muscle mass. The muscle strength was also examined, and the knee extension force (KEF), ankle dorsiflexion force (ADF). The KEF and ADF were normalized to the bodyweight, and the total leg muscle force (TLMF) were calculated by combining the KEF and ADF. The leg muscle quality (LMQ) was calculated as the TLMF normalized with the LMV. [Results] While no significant differences were found in the LMV between groups, the body mass index were higher in the DM group than in the control group. Significant differences were observed in %KEF, %ADF, and the LMQ in the DM group, with 15.8%, 18.7%, and 11.5% lower values than those in the control group, respectively. [Conclusion] The results of this study may demonstrate that muscle weakness occurs before diabetes progresses to a severe condition.


Diabetes mellitus; Middle aged; Muscle weakness

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