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Purpose) This study investigated the alteration of blood pressure and heart rate variability (HRV) of healthy subjects before, during and after Saunders cervical traction at different traction forces. (Subjects and Meth- ods) One hundred eighty healthy volunteers were divided randomly into A (5% body weight, n = 60), B (15% body weight, n = 60) and C (25% body weight, n = 60) groups. Changes of the blood pressure, oxygen concentration and HRV in the three groups after completing the three evaluation sessions were examined by comparing results from a session with the previous one. (Results) During Saunders cervical traction, significant differences were found with - in groups B and C, in the change of systolic and diastolic blood pressure, heart rate and HRV. In group C, significant differences in these changes were also observed after cervical traction. (Conclusions) HRV, which is induced by changes in blood pressure, reduced with increasing cervical traction force. Our results suggest that traction forces of 15% and 25% body weight should be carefully used for patients with cardiovascular diseases.

Comparison of Blood Pressure and Heart Rate Variability in Saunders Cervical Traction at Three Different Forces