fa آسیب شناسی ورزشی و حرکات اصلاحی Sport injury and corrective exercises پژوهشي Research Objectives: Kyphosis is a common spinal abnormality. It is thought that kyphosis has an effect on respiratory system function. The purpose of this study was to investigate the relationship between thoracic kyphosis and respiratory capacities measurement by spirometer. Materials &Methods: This is a descriptive correlational design. A total of 20 males who are matched with age and body mass index participated in the study. The respiratory capacities (Forced vital capacity, Maximum voluntary ventilation, Slow vital capacity) were measured using spirometer. The size of the thoracic kyphosis was measured using flexible curve. Pearson correlation coefficient and Scatterogram was depicted to determine the correlation between variables. Results: The findings showed no significant correlation of the thoracic kyphosis and respiratory capacities used by spirometer. Conclusion: It seems that thoracic kyphosis does not have effect on respiratory capacities. Thoracic kyphosis, Respiratory capacities, Spirometer 57 61 http://ptj.uswr.ac.ir/browse.php?a_code=A-10-106-1&slc_lang=fa&sid=1 aliakbar san'ati علی اکبر صنعتی sanati.aliakbar@yahoo.com No Amir Massoud Arab امیر مسعود عرب arabloo_masoud@hotmail.com Yes لیلا غمخوار lghamkhar@yahoo.com No