The main objective of this research was to synthesize the evidence of previous studies on physical activity and nutritional status in university students (specifically undergraduate students) by means of a systematic review. Among the instruments applied to determine nutritional status, the body mass index (BMI) validated by the World Health Organization stands out. In general, the determination of body fat percentages by means of electrical bioimpedance and the skinfold technique, and the measurement of waist circumference were most frequently used. In the analysis of physical activity levels, the International Physical Activity Questionnaire (IPAQ) short version (2003) was used preferentially, and the Accelerometry technique was used much less frequently. On average, according to BMI, more than 30% of the university students were classified as overweight or obese. The male sex (34%) had higher averages than the female sex (28%), with an overall mean BMI that could be considered adequate (x=23.1, ± 7.3). Low levels of physical activity practice accounted for 34% of the students, medium levels for 58% and high levels for only 8% of the university students. In the overall results of the correlations of some studies between nutritional status and physical activity, on average, physical activity had a significant and inversely proportional relationship with BMI (r= -0.228; p=0.001), fat mass (r= -0.291; p< 0.001) and visceral fat (r= -0.197; p= 0.002).