Introduction: Over the years people diagnosed with diabetes mellitus type 2 have difficulties to understand the variability of blood glucose monitoring. The lack of perception in the exercise may be a risk. Objective: To investigate the perception of capillary blood glucose in type 2 diabetes before and after training sessions. Material and Methods: The study with 32 subjects with diabetes mellitus type 2 (DM2). The subjects performed three training sessions per week. The diabetic patients were divided into aerobic training, resistance training and combined training (aerobic and resistance). The perception collection was made through a questionnaire before and after exercise sessions, soon afterwards, was collected capillary blood glucose for later comparison. Results: The sample showed a positive response to correlate their glucose perception with real capillary glucose. When comparing the blood glucose values with perceptions in the pre and post intervention, it is possible to see a more ascending correlation post workout. When comparing perceptions before and after training sessions, we found that most individuals have the ability to notice the drop in blood glucose caused by the exercise sessions. Conclusion: We conclude that the sample shows a positive response in relating the capillary blood glucose with glucose perception, which may contribute to more appropriate decisions for control of diabetes and consequently avoiding chronic complications