Sport participation or regular physical activity is often seen as a factor, which leads to better health and well being. Sport also has a social function, as most of the activities are performed together with other people. However, while club sports in Sweden have a stimulating effect on young men, there is a risk that they do not provide enough scope for young women. In particular, early specialization and a high level of seriousness do not suit all young sportswomen. The purpose of this study was to develop a theoretical understanding of the ways in which sport has influenced young women’s lifestyles in terms of their attitudes to physical activity in adult life. The data were collected using strategic interviews and analyzed using the grounded theory method. Based upon the results, young women’s physically active lifestyles varied depending on how they valued their sport in combination with how they handled their sport. Sport was regarded as having a positive effect on health and well being. This led to the young women studied intending to pursue a physically active lifestyle also in adult life. They enjoyed participating in sport, but not particularly sport with a high level of seriousness or a high level of vigor, which is what characterizes most club sports today.