标题：Investigating the effect of one session of practice of karate speed kata, power kata, and kumite on the amount of viscosity, fibrinogen, cortisol, lactate dehydrogenase, and plasmatic lipid profile in young female karate players
摘要：the main purpose of this research was to investigate the effect of one time karate practice in form of kumite, speed kata and power kata on the levels of cortisol and lactate dehydrogenase, as Compression index, fibrinogen and viscosity, as indicators from rheology, along with lipid profiles related to viscosity in karate player girls. For this purpose, 40 female karate players from Shiraz (18-30 years old), with the black belt higher than Dan 1 and at least 4 years of practice, were considered eligible after the call and were divided into control (ten persons), kumite ((ten persons), speed kata (ten persons), and power kata (ten persons) randomly. All of the participants were in mid-luteal phase. The experimental groups were asked to dedicate a similar time period (six 2-minute turns with 90 seconds of rest between the turns) to kumite activity, speed katas, and Ampi and Kanku Dai katas, respectively. With similar circumstances, power kata group repeated Jion and Gojuhish Sho katas sequentially. Ten milliliters of cubital vein blood were gathered in pipes containing EDTA in two times before and after the end of one session of intended activity. Then, it was centrifuged with low round and its plasma was divided into three parts and some part of it was used in order to determine the amounts of cortisol, fibrinogen, lactate dehydrogenase, blood lipids, and required variables in calculating viscosity. The data was analyzed using appropriate statistical method (co-variance, with considering the group factor) and Bonferroni follow-up test. Data analysis showed that changes in plasmatic cortisol were increased significantly in experimental groups compared to control group after the activity, but there was no significant difference between experimental groups. The changes in the levels of fibrinogen was significant and this significant difference was observed only between the control kumite group and power kata. The changes in plasma viscosity were not significant. Data analysis showed that changes in the levels of total cholesterol have been significant and not in triglyceride and HDL. Using appropriate follow-up test showed that this difference has been significant only between two kumite and power kata groups. A significant difference was seen in levels of lactate dehydrogenase and this difference was seen between speed kata group and other subject groups. The research data revealed that all three types of kumite, speed and power katas activity had the ability to put the athletes under pressure. On the other hand, looking at the amounts of LDH, the amount of pressure indicated the effectiveness of speed kata. Since the amount of plasmatic cortisol has been higher in this group. Also, findings showed that, despite the significant differences in the levels of fibrinogen, plasma viscosity had not been affected so much. Its result could be the lack of changes in other effective variables such as the levels of TG, HDL, and hematocrit. Based on the findings of the present research, it seems that using speed kata would be more appropriate for increasing the performance of kata players than power kata.
关键词：female karate players; viscosity; fibrinogen; cortisol; lactate dehydrogenase; speed kata; kumite; power kata
