Background/purpose: The study aimed to identify the importance of strength and speed levels of the upper and lower limbs of the body and their relationship to digital achievement in swimming. Methods: The quasi-experimental approach was used. The study sample consisted of 28 students from the swimming course who were selected using the Intentional method. Upper and lower speed tests, maximum upper and lower strength tests, and strength endurance tests were used to achieve the objectives of the study. Results: The results indicated that all study individuals had a high level of explosive strength in the lower and upper limbs. The results also showed that all study individuals had a low level of strength endurance variable. There is a correlation between strength and speed levels of the upper and lower limbs of the body and achievement. The researchers recommend focusing on the different stages of learning and developing the elements of physical fitness in the upper and lower limbs.