The objective of this study was to verify if there have been changes in the indices of injury of corridors of State military police of Rio de Janeiro, crowded in, which combined sessions 7Bpm undertake dynamic stretching. The sample consists of 92 officers, aged 23 and 45 years. Measure the anthropometric data regarding (weight and height) time in practicing physical activity, food and sex. Each exercise session will be held in a progressive intensity of 60 to 85% of maximum heart rate (HR), in the first two weeks (pre-test) and in the last two weeks (post-test). Activities were held 4 times per week for 1 month, within 45 minutes controlled by FC volume 10 (1980). Descriptive statistics was used, through the Chi-square test for independent samples. Based on the results there was significance (p<0.05), and relationship between the practice of stretching and injury prevention 0.1% (0.001).