Aim – To determine the effectiveness of 6 weeks of moderate intensity exercise training & To provide an appropriate measure of cardiovascular fitness. The YMCA 3minute step test is based on how quickly your heart rate recovers following a short bout of exercise. Hence the purpose was to provide a submaximal measure of cardiovascular fitness after six-weeks of moderate intensity exercise training among young obese adults. Methodology - According to simple random sampling 50 participants were included in the study after screening for the inclusion criteria. Thereafter They were explained the purpose of the study and the procedure involved in the study. Informed Consent was obtained and a YMCA 3-minute step test was done. Heart rate measures were recorded at the end of the 3-min step test Pre & Post intervention. Data analysis was done at the end of the study. Results – Post intervention 10 students (20%) out of 50 had good cardiovascular fitness level, 22 students (44%) had an above average cardiovascular fitness, 13 students (26%) had average fitness & 5 students (10%) had below average level of cardiovascular fitness. Conclusion- This study concluded that, six weeks of moderate intensity exercise training improved cardiovascular fitness and lowered the risk of developing cardiovascular disease in obese young adults. Keywords: Cardiovascular fitness, YMCA 3minute step test, Moderate intensity exercise training.