The purpose of this study; The aim is to examine the effects of 8-week calisthenic exercises applied to swimmers aged 8-10 on some physical and physiological parameters. A total of 20 male students from Kayseri Erciyes Alfa Youth and Sports Swimming Club participated in the study voluntarily. In the study, participants were divided into two groups: control group (CG, (n:10)) and calisthenic exercise group (KEG, (n:10)). Body fat percentage (BMI) and Body mass index (BMI) of the participants Shoulder width with Tanita BC 418 MA Segmental body analysis device with professional monitor Back-leg strength with Kingstar brand 1.5 meter long tape measure Vertical jump test with Takei (Japan) brand back-leg dynamometer Right and left hand-claw strength was measured with a Takei brand hand dynamometer, and anaerobic capacities were measured with a Monark Ergomedic 894 E Peak Bike brand device, using a Jump-meter brand device. While the participants applied the general training programs for the swimming branch planned by their coaches during the season on the training days, the participants in the calisthenic exercise group (KEG) separately applied calisthenic exercise programs 3 days a week for 8 weeks, in addition to swimming training. IBM SPSS 21 package program was used to analyze the data and the significance level of the study was determined as P<0.05*. According to the normality test results, nonparametric tests were preferred. While descriptive statistical analyzes were performed on the participants' height, age and body weight variables, Wilcoxon signed-rank analysis test was used to determine the difference between the pre-test and post-test measurements of the groups. As a result, the calisthenic exercise program performed on children engaged in swimming sports provided a statistically significant increase in leg strength, right and left hand grip (hand-claw) strength, shoulder width, vertical jump and anaerobic average power values; It was found that calisthenic exercises did not create a statistically significant difference in BMI, BMI and back strength. In addition, while the anaerobic power peak value results were in favor of the control group, no significant difference was found in the participants who underwent calisthenic exercise. In short, it can be said that 8-week calisthenic exercises applied to children have a positive effect on the development of some of the physical and physiological characteristics mentioned above.