This study explores the difference in VO2max between males and females. It examines the factors that influence VO2max, such as age, gender, body composition, and mode of exercise. The study finds that males generally have a higher VO2max than females, regardless of age. However, body composition and cardiac size are major determinants of VO2max. The study also discusses the relationship between exercise type and VO2max. Overall, this study provides insights into the importance of VO2max in measuring cardiovascular fitness.