Purpose: The purpose of this study was to compare the effect of the modified protocol of the American Academy of Sports Medicine (NASM) on land and water on frontal head complications in Kermanshah students. Materials and methods: The current research was semi-experimental with a pre-test-post-test design, which was conducted with two experimental groups and one control group. The subjects of the study included 45 non-athletic male students of the second grade of highschools of Kermanshah city who had the abnormality of upper cruciate syndrome with an average age of 16±0.74 years, an average weight of 60±0.5 kg, and an average height of ±0.30. 175 cm were purposefully selected and randomly divided into three groups of 15 people: exercises in water, exercises on land and control. The exercise program included the NASM protocol, which was performed in experimental groups for 8 weeks, three sessions a week and each session lasted 60 minutes. A checkerboard, photography technique and spinal mouse device were used to measure the amount of frontal complications. The data were analyzed using 3*2 ANOVA and correlated t test. Findings: The results showed that there is a significant difference in the lead angle between the three groups of training in water, training on land and control (p<0.05). So that in the head angle, there was a significant decrease in the scores of the water exercise group from the pre-test (54.98) to the post-test (45.63), and the dry exercise from the pre-test (54.81) to the post-test (64.64). Conclusion: Based on the results of the present study, NASM exercises on land compared to water had a greater effect in reducing the angle of the head of the students, so the aforementioned exercises are suggested to improve and correct the problem of the head and the upper crossed syndrome.