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Objective To investigate the effects of portable and wearable devices combined with exercise management on blood glucose and muscle oxygen metabolism in type 2 diabetes mellitus (T2DM) patients. Methods A total of 54 T2DM patients without exercise contraindications, who were admitted to the Department of Endocrinology in the First Affiliated Hospital of Henan University of Science and Technology from May 2018 to June 2019 were selected. The patients were divided into two groups: wearable devices combined with the exercise management group (the experimental group, 33 cases) and control group (21 cases) according to the random envelope method. Both groups were given routine discharge health education and exercise guidance. The experimental group wore portable devices during exercise once every other day for two weeks. Two weeks later, a home program with brisk walking according to the exercise speed of the patients was formulated, and the program was managed remotely through step counting on Wechat, the daily exercise of patients was uploaded to the Wechat group of exercise management. After 24 weeks, the patients were tested in the exercise center. The control group wore portable devices to collect indicators at baseline and the end of the study, without exercise intervention guidance. After 24 weeks, the changes of the two groups in fasting plasma glucose (FPG), glycated hemoglobin A1c (HbA1c), low-density lipoprotein cholesterol (LDL-C), muscle oxygen, and heart rate were measured. Statistical analysis to compare the indexes between groups was conducted with t-test, Wilcoxon rank-sum test, or χ2 test. Results Compared with the control group, LDL-C significantly decreased in the experimental group [(-1.02±0.96) vs. (0.19±0.85)mmol/L, respectively, P<0.05] after the intervention. In contrast with the indexes before intervention, FPG [7.00 (5.90, 8.20) vs. 8.00 (6.70, 9.60) mmol/L], HbA1c [6.40% (6.10%, 7.00%) vs. 7.50% (6.20%, 10.10%)] and LDL-C [(1.83±0.72) vs. (2.85±0.80) mmol/L] in experimental group decreased significantly (P<0.05). The crossing time of muscle oxygen and heart rate curve, the lowest point time of muscle oxygen, and the rising point time of muscle oxygen were advanced in experimental group compared with the control group, with the values of (13.70±6.22) vs. (14.56±5.18) min, (14.05±3.75) vs. (15.88±3.70) min, (16.90±5.25) vs. (18.00±4.49) min, but there was no statistical significance (P>0.05). Compared with the control group, after 24 weeks, the muscle oxygen at 1 minute in the second stage was significantly decreased (3.85%±0.58% vs. 2.43%±0.24%) and the heart rate at 2 minutes in the third stage was significantly increased [(3.33±0.58) vs. (5.06±0.57) times per min, P<0.05]. Conclusions Portable and wearable devices combined with exercise management can decrease the blood glucose level, and improve muscle oxygen metabolism and cardiorespiratory endurance in T2DM patients. [ABSTRACT FROM AUTHOR]