| Summary: | Sedentary individuals are persons who live unhealthy lifestyles and lack any physical activity. Being physically inactive may lead to risk factor for mortality instance, obesity, cardiovascular disease and diabetes. Insufficient physical activity may cause damaging cardiovascular health and it changes the outcomes of the health that effect on body composition and health. Therefore, exercises have been recommended as a useful strategy to curb sedentary lifestyles. The different types of exercise intensities that may result in different effects such as cardiovascular responses and body composition changes among sedentary. The purpose of this study was to compare the effectiveness of different exercise intensities and to determine the relationship on cardiovascular response and body composition among sedentary students. A total of (N=36, age=24.36±3.02 years old; weight= 56.36±7.58 kg; height=160.87±6.23 cm) sedentary subjects of short high intensity interval training (SHIIT) group (n=12), long high intensity interval training (LHIIT) (n=12) and moderate intensity continuous training (MICT) (n=12) were participating in this study. Body composition outcomes were body mass index (BMI), waist-hip ratio (WHR), and visceral fat was taken using the In-body screening device for pre and post data. Next, exercise Stress Testing (EST) protocol using treadmill was conducted to determine Peak VO2 during pre-test screening. Next, during pre-test and exercise intervention subjects resting heart rate (RHR), resting systolic blood pressure (SBP) and resting diastolic blood pressure (DBP) were taken. The subjects required to follow all the training given 3 times per week for 4 weeks. LHIIT consisted of 20 minutes of effort through with work that required of >85% HRR and 60% of HRR for the recovery phase. The duration of LHIIT that subjects were to perform was 1 min of work with 30 second of recovery. SHIIT consisted of the work at an intensity >85% HRR. The circuit started with 30 seconds of cycling that repeated until finish the subject’s reps with a bout interceded by a recovery session of 30 seconds. MICT were conducted with continuous cycling at 55%-65% of VO2 max for 58 minutes. The estimation of the exercise volume for one session exercise intervention is 400 kcal. Two-Way Repeated Measure ANOVA was used to analyse RHR, SBP, and DBP changes among sedentary students. Study one showed that there was a significant difference between groups on reduction of RHR, p=0.04 while there was no significant difference between groups on reduction of SBP, p=0.87 and DBP, p=0.527. Study two showed that there is a significant relationship between cardiovascular response and body composition among all sedentary students F (2,33); r=6.763, p<0.001. In conclusion, four weeks of different exercise intensities revealed no effects on the reduction of blood pressure responses but it may affect in lowering RHR. © JPES.
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