Background: Based on data from the three of the Nutrition and Health Surveys in Taiwan (NAHSIT), which occurred in 1993–1966, 2005– 2008, and 2013–2014, it was noted that the prevalence of adult obesity had drastically increased from 11.8% to 17.9% to 22.1%, in recent years. Thus, considering the public health impact, and that weight loss is effective for reducing chronic disease risk a study was done on young adult Taiwanese students to measure the impact of aerobic exercise on weight loss. Aims & objectives: The aim of this study is to investigate & compare the effects of different intensities of aerobic exercise and energy expenditure on different anthropometric indices in obese Taiwanese students. Method: In a 12 week exercise programme after initial screening, 48 obese Taiwanese students were randomly assigned into four different aerobic intensity groups. All participants’ demographic data, anthropometric data, anthropometric measurement, blood biochemical parameters and health-related physical fitness components between baseline and week 12 were analysed and compared using a Statistical Analysis System (SAS). Result & conclusion: The study showed that difference in exercise intensities resulted in significant changes in body weight, waist circumference(WC), weight to hip ratio(WHR), and weight to height ratio( WHtR ) amongst the participants of high intensity training group (HITG), medium intensity training group (MITG) and Low intensity training group (LITG). Though, HITG with higher energy expenditure was more effective in improving body composition in comparison to (LITG), even when the diet was not controlled. Thus, intensity may be crucial for modulating abdominal fat and sequentially reducing WC, WHR, and WHtR.