Background: Dysmenorrhea is the most common symptom of most menstrual complaints, and has a greater risk of causing disease than any other gynecological complaints. Dysmenorrhea can be accompanied by other symptoms such as sweating, tachycardia, nausea, vomiting, headache, diarrhea and tremors. Dysmenorrhea causes activity limitations which can affect productivity and quality of life of a woman.Objectives: Determine the effects of Zumba on primary dysmenorrhea among female students of the  Faculty of Medicine, Diponegoro University.Method: This study used an analytic observational study with a pretest-middletest-posttest design. A participants of 49 students were divided into 2 groups. The control group (K) was not given the Zumba intervention. Treatment group (P) was given 8-week intervention program with two 60’ sessions per week of Zumba. Data were collected before, during, and after Zumba intervention using a self-administrated dysmenorrhea questionnaire and VAS pain scale.Result: Based on the VAS pain scale and dysmenorrhea questionnaire, the mean value of the control group and treatment group was K: 2,02; 1,92; 2,06; P: 1,98; 1,98; 2,04. Statistical analysis using Friedman tests showed statistically not significant differences (p > 0,05).Conclusion: Zumba exercise did not have a significant difference in reducing dysmenorrhea pain levels.Keyword: Zumba exercise, exercise, primary dysmenorrhea, menstrual pain

Introduction : Explosive power are the combination maximum strength and maximum velocity. High value of muscle strength and velocity can lead to good measurement of explosive power. Plyometrics training known as an exercise that can increased explosive power. This exercise is really popular among athletes and has proven to increase their explosive power. However, there’s still no further study that measured explosive power on medical students after given plyometrics training treatment. Methods : Quasi experimental study of plyometrics training has done for 6 weeks to medical students Diponegoro University. 28 subjects was divide into 2 groups : plyometrics training (as treatment group) and control group (as non-treatment group). Vertical jump test score was measurement in pre-test, middle-test, and post-test. The explosive power measured by vertical jump test. The results were analyzed by SPSS software. Results : The explosive power improved among subjects in plyometrics treatment group. During the plyometrics treatment, vertical jump was singnificantly increase during treatment in pre-test to mid-test (35.93 cm to 49,21 cm ; P : <0.001) and mid-test to post-test measurement (49.21 cm to 54.21 cm ; P : <0.001). Vertical jump score significantly increase in plyometrics group compare to control group ; on middle-test (<0.001 vs 0.344 ; P 0.019) and post-test (<0.001 vs 729 ; P 0.001) measurement respectively. Conclusions : Plyometrics training improved lower limb explosive power in male medical students of Diponegoro University. This is marked by significantly increase among subjects in plyometrics treatment group.Keywords: Plyometrics Training, Explosive Power, Vertical Jump Test

Introduction : Strength is the ability to excert force, which can resist external resistance and its purpose as a basis for human movements. Strength also can be a standard for measuring someone’s performance. Plyometrics training known as an exercise that can increased muscle strength. Great muscle strength can lead to great muscle endurance so that the person will become healthier and will not get tired easily. However, there’s still no further study that measured leg muscle strenght on medical students after given plyometrics training treatment. Methods : Intervention of the study was plyometrics training for 6 weeks. This study was a quasi-experimental with pre-test (before training), middle-test (after four weeks training), and post-test (after six weeks training). The subjects were 28 (15 to 25-year old) male medical students of Diponegoro University divided into 2 groups with 14 samples for each group: control group and treatment group. Muscle strength were measured by leg dynamometer. The results were analyzed using SPSS. Results : The muscle strength which measured by leg dynamometer improved among subjects who did plyometrics training. The significant results (P = <0,05) found on middle-test and post-test proved that plyometrics training affects the enhancement of leg muscle strength. Conclusions : Plyometrics training for 6 weeks proved to increase leg muscle strength of medical students in Diponegoro University.Keywords: Plyometrics Training, Strength, Leg Dynamometer