To evaluate the effects of low-load resistance exercise (RE) with intermittent blood flow restriction (BFR) on the muscle thickness, blood lactate, creatine kinase (CK) and thiobarbituric acid-reactive substance (TBARS) levels in male. METHODS: The study included 10 male college students aged 23.5±1.0 years who underwent the following experimental protocols in random order on separate days (72 hour): 3 sessions at a 30% one-repetition maximum (1RM) RE with BFR (individual systolic blood pressure, 150% systolic blood pressure and 200% systolic blood pressure); 1 session at 60% 1RM RE without BFR (CON). The thigh circumference, TBARS and CK levels were measured before exercise (pre-exercise) and post-exercise and lactate, heart rate (HR), systolic (SP) and diastolic blood pressure were measured pre-, post-exercise, 5-, 15-and 30-minutes recovery. RESULTS: Thigh circumference significantly increased following 30% 1RM with SP (p=.10) and SP 200% (p=.36) BFR compared to 60% 1RM without BFR but there was an increasing tendency in 30% 1RM with SP 150% (p=.83) BFR. Additionally, there were significant increases in TBARS (p<.05) and CK (p<.05) in the all protocols post-exercise samples compared with the pre-exercise samples but no significant group (p=.113, p=.870, respectively) or interaction (p=.385, p=.132, respectively) effect. CONCLUSIONS: 30% 1-RM with BFR may effectively increase the circumference of the thigh muscle compared to 60% 1RM without BFR. Although both 30% 1RM with BFR (SP, SP 150%, SP 200%) and 60% 1RM without BFR temporarily increased TBARS production and CK, It does not cause damage.

No abstract

No abstract

Purpose: This article is purposed to present the correct statistic method by pointing out the statistical errors after analyzing the method of articles that were published in Korean Academy Journal of Periodontology and made statistic processes in them. Methods: 488 science papers which being put in Korean Academy Journal of Periodontology published from 2000 to 2006 was divided according to year. Results: In the 308 articles that applied statistic methods, 59 articles (50.0%), the largest portion of all, were included the case that applied incorrect parametric statistic method when needed to apply parametric statistics and 38 articles (32.2%) were included in the case that applied incorrect parametric statistic method when needed to apply non-parametric statistics. Conclusions: It is necessary to present the cases of inappropriate statistical methods in order to improve the quality of academic researches. Also, to apply adequate methods of statistics, it is suggested to report the articles periodically which are comparing and analyzing the statistical methods that are applied in the international articles in periodontal field. (J Korean Acad Periodontol 2009;39:399-405)

The purpose of this study was to investigate the effects of self-myofascial release exercise (SMR) and sports massage (SM) treatment on exercise performance and fatigue recovery in male college students. METHODS: Twelve male college students (23.41±1.24 years, 174.33±6.75 cm, 71.57±9.63 kg, 17.01±6.48% fat) participated in the study. Subjects were randomly assigned to either an experimental treatment (SMR or SM) or control (CON). All subjects were performed with 1st treatment (CON, SMR, SM) for 10 minutes in the lower limbs before isokinetic exercise and Wingate test. After 1 st treatment, Wingate test was performed for 30 seconds after performing isokinetic exercise at 240°/sec left and right 28 times. After isokinetic exercise and Wingate test (All-out), 2nd treatment was performed for 10 minutes. In order to analyze creatine kinase (CK) and lactate, blood was collected and measured 9 times in total. RESULTS: There was no significant difference in the left and right endurance, maximal power, and total workload of the extension and flexor muscles measured by isokinetic exercise. In addition, there was no significant difference in the mean power (p=.116), maximum power (p=.214), fatigue index (p=.236), and total workload (p=.108) during Wingate test. In the case of CK and lactate levels, there was also no significant difference in treatment (CON, SMR, SM) and interaction effect except over time (p=.000, p=.000 respectively). CONCLUSIONS: In conclusion, it seems that fatigue recovery and exercise performance are not affected by self-myopia relaxation exercise and sports massage treatment for 10-minute before and after exercise.