Respiratory function has direct relation with the physical training and exercise. Unusual cardiorespiratory activity of a human being can affect the balance of his or her physiological homeostasis. Study shows that regular physical training or organised exercise can improve lung function. Peak expiratory flow rate (PEFR) is a parameter to observe lung function. The purpose of the present study was an endeavor to the best method of improvement of Peak expiratory flow rate which is one of the physiological attributes. Out of 96 selected participants from fluvio coastal zone of west Bengal, India on the basis of BMI, 80 NCC SD Cadets (average age:20) were consider for the study. The subjects were divided into four groups (20 for each group) randomly namely Weight Training Group (WTG), Aerobic Training Group (ATG), Graded Circuit Training Group (GCTG) and Control Group (CG). Separately designed 12 weeks training programme for WTG, ATG and GCTG was applied on the subjects at morning between 8.00 am to 9.15am for three alternative days per week. After every four weeks, total load was increased. Pre and post-test on the groups were conducted to measure the training effect on peak expiratory flow rate (PEFR). The collected data were statistically analyzed by using the analysis of Co-variance (p<0.05) to determine differences, the LSD test was applied as a post hoc test to find out the paired mean differences. From the obtaining result, it was concluded that weight training, aerobics and graded circuit training are found to be effective for improving the peak expiratory flow rate (PEFR) of NCC SD Cadets.