The Influence of Cinema Screen Colors on The Heart Rate and Blood Pressure among Students in the College of Fine Arts


Background: The strong relationship between hypertension and stress have been confirmed in previous studies. The stress has been shown in rise blood pressure by rising heart rate and the cardiac output .Objective: To test the influences of exposure to red versus green light colors of cinema screen on the rate of heart beat and blood pressure among healthy college students.Patients and Methods: In this study a twenty eight apparently healthy students from college of fine arts Diyala University were enrolled. They were 18 males and 10 females with a mean age 22 years. Verbal consent was obtained from all participants. They were exposed to two colored lights of cinema screen (red and green) viewing at a distance 4 meters. The watching time was continued for 15 minutes. Thereafter ten minutes the systolic blood pressure [SBP], diastolic blood pressure [DBP] and heart rate was measured by medical personals. Data were collected and statistical analysis was done using the SPSS version 20 and P value was counted significant whenever it is less than 0.05. Results: The results revealed that the exposure to red light increases both systolic and diastolic blood pressure and heart rate compared to the green light, since the mean ±SD of diastolic blood pressure for red light and green light are 8.22±0.59 and 8.02±0.66 versus that of the control is 7.81±0.46 cmHg. Thus Red and green light had a significant effect on diastolic blood pressure (P <0.05). Whereas, the mean ± SD of systolic blood pressure for red light and green light are 11.85±1.11 and 11.77±1.24 versus that of the control (11.75±0.96) cmHg, with insignificant difference (P > 0.05). The mean ±SD of heart rate for red light and green light are 79.75±11.19 and 79.10±9.87versus that of the control 76.71±8.81 beats/min.Conclusion: Exposure to red and green cinema screen colors is altering autonomic nervous functions as expressed by increasing the blood pressure and heart rate among healthy college students.