To determine the relationship of the flexibility of the hamstrings and the strength of the soleus with the jump and speed in university players of ultimate Frisbee of the city of Medellin. Methodology: Type of study. Descriptive with correlational scope. 103 athletes participated, sampling was at convenience according to the number of athletes enrolled in Ascundeportes Antioquia. He used survey and observation as information gathering techniques. Results: 84.2% of men are in an age range between 16-24 years, while 60% of women are in a range of 16-20 years. The mean age was 20.93 years +/- 3.141 years. The average flexibility of the hamstrings in women is approximately 5 cm higher than in men. It is also shown that the difference in the mean of flexibility in men and women is statistically significant. The average maximum strength of the soleus between the left and right foot was similar for both genders, however, the maximum strength of the men's soleus was approximately 30 pounds greater than that of the women Conclusions: the flexibility of the hamstrings has a Inverse correlation with the maximum strength of the hamstrings, which means that the greater the flexibility of the hamstrings, the lower their maximum force. In addition, it is shown that the maximum strength of the hamstrings has a direct correlation with the jump and inverse with the speed.