INTRODUCTION: Sarcopenia is defined as a progressive and generalized muscle disorder that involves accelerated loss of muscle mass and impaired function. It is believed to influence the ability to carry out daily activities, muscle strength, and physical capacity in the elderly. Studies have shown that sarcopenia has been implicated as both a cause and a consequence of diabetes mellitus. In this analysis, we aimed to systematically show the impact of exercise intervention as a therapy for patients with diabetes mellitus and sarcopenia. METHODS: Electronic databases, including PubMed, Embase, Web of Science, and the Cochrane database, were searched from November to December 2021 for publications based on exercise intervention in patients with sarcopenia. After the selection of studies for this analysis, patients with diabetes mellitus were retrieved. Since dichotomous data including mean and standard deviation were reported, weighted mean difference (MD) with 95% confidence intervals (CI) were used to represent the data following analysis. RESULTS: A total of 431 participants with diabetes mellitus and sarcopenia were included in this meta-analysis. A statistical analysis was carried out on patients with diabetes mellitus who were assigned to the exercise intervention group. Our analysis showed that "sit-to-stand test" and "timed up and go" were significantly in favor of exercise intervention: MD -1.57, 95% confidence interval (CI) -2.26 to -0.87 (P = 0.0001) versus MD -0.61, 95% CI -1.21 to -0.01 (P = 0.05), respectively. Handgrip strength, walking speed and leg strength were also assessed. Another statistical analysis was carried out, this time on patients with diabetes mellitus and sarcopenia who were not assigned to an exercise intervention. The results showed no significant difference among sit-to-stand test, timed up and go, handgrip strength, and leg strength. CONCLUSIONS: Exercise intervention significantly improved the time taken to stand up from a sitting position, and to "stand up and go" in patients with diabetes mellitus and sarcopenia. Therefore, exercise intervention should be considered a relevant therapy for such patients.

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