The study was conducted by the authors. “Anthropometric characteristics and exercise electrocardiogram in patients with sinus bradycardia undergoing electrocardiographic exercise testing". Method: Cross-sectional descriptive study. Study on 60 patients with selection criteria being patients with sinus bradycardia less than 50 beats/minute on resting 12-lead electrocardiogram, with or without symptoms of bradycardia at two units, Vietnam National Heart Institute and Hanoi Heart Hospital during the period from January 2020 to September 2021. Results: Anthropometric characteristics: The ratio of men and women is similar, the average age was 55.12 ± 13.89 years old, the majority were over 50 years age (6,6,7%), The majority of patients had a BMI below 23 (63.3%) and higher 23 (36.7%) with no statistically significant difference, the most common comorbidities are hypertension (38.3%). Characteristics of exercise electrocardiography: The average exertion time was 10.53% ± 0.46 minutes. Most patients stopped exercising at stages 3 and 5, the maximum exercise capacity achieved has a slightly low average value of 7.78 ± 3.56 METs, the Hrmax was 129.90 ± 29.22 beats/minute, the mean value of maximum exercise SBP is 155.23 ± 20.59 mmHg, the variation in SBP is 4.84 ± 2.72 mmHg/MET, the average value of maximum exercise DBP was 88.10 ± 9.11 mmHg, DBP variation was 2.40 ± 1.75 mmHg/MET. The average decrease in heart rate in the first 1 minute is 27,87 ± 16,82 beats/minute. Conclude: The increased rate of sinus bradycardia with age also coincides with an increased risk of other cardiovascular diseases. The average age was 55.12 ± 13.89 years old, the ratio of men and female is similar, the majority of patients had a BMI below 23 and higher 23 with no statistically.