Even if this study can give a good contribution to understanding the phenomenon, it was not exhaustive. In fact, the correlational research design cannot give a definitive explanation of the question and furthermore, this study focused only on gym exercisers. Future research should use different types of sport and, in particular, it could explore the differences between individual and cooperative physical activity. Another relevant aspect of understanding the relationship between personality traits, motivation and exercise could be basic psychological needs. There are few studies that explore this area and future research should give it more attention, because it could provide a relevant contribution.