Physical activity is a complex behaviour that is nurtured by environmental and biological factors. In day-to-day life, moderate level of physical activity has a number of positive influences on all systems, especially cardiovascular and respiratory systems. Few studies reported how the different modes of aerobic exercise influence the cardiovascular efficiency and physical fitness in sedentary subjects. This study was aimed to study the effect of whole body exercise, walking exercise, upper and

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... lower limb exercise and combined exercise on sedentary males. Method: Seventy five healthy non-smoking males aged between 15-25 years were recruited for 12 week exercise training. Participants were divided into five groups, 15 in each. Each group performed different exercise for 12 weeks under the supervision of physical trainer. Interventions included respiratory rate, resting pulse rate, blood pressure, forced expiratory volume in one second (FEV1), peak expiratory flow rate (PEFR), 6 minute walk distance (6 MWD), 12 minute walk distance (12 MWD), 6 minute bicycle ergometer (6 MBE) test and 6 minute arm ergometer (6MAE) test. Parameters were studied twice before and after exercise training. Data was represented as mean±SD. Students paired t test was applied for pre and post data analysis. Result: The increase in cardiorespiratory efficiency was found significantly higher in response to whole body, combined and walking exercise. The other mode like only upper limb or lower limb exercises are not as beneficial. Conclusion: In conclusion cardio-respiratory efficiency and exercise performance both are improved by regular exercise training and whole body exercise is the best among all. Lower limb exercise is least beneficial.