Open AccessBackground and Objective: Recreational swimming is a good way to relax, while enjoying a full-body workout and is recommended for the prevention and treatment of hypertension and cardiovascular disease. The present study compares the physical fitness in young freestyle swimmers practicing regularly and non-swimmers to measure the cardiovascular endurance. Materials and Methods: This Study was carried out at tertiary health centre of Municipal Corporation of Greater Mumbai on medical students after the informed and written consent. Sixty male medical students of age group 18 – 25 years fulfilling the inclusion criteria were included. Their Physical Fitness Index was calculated. The data was analysed using student’s‘t’ test. P less than 0.05 were considered the level of significance. Result: In this study we found that, the Physical Fitness Index (PFI) in swimmers is significantly higher than in non-swimmers and is statistically significant. (p = 0.000). Discussion and Conclusion: Swimming as a recreational aerobic exercise performed can be recommended for use in everyday activities in fitness clubs. In addition, it can serve as a basis for the development of new aerobic programs aimed at the future.