Abstract
This study aims to find out: (1) the effect of the circuit bodyweight training method on increasing muscle strength, muscle endurance, and balance of wrestling athletes, (2) the difference in the effect of the circuit bodyweight training method between the treatment group and the control group on increasing strength, muscle endurance, and balance of wrestling athletes. This type of research is quasi-experimental with a pre-test design and post-test control group design. The sample in this study amounted to 77 people taken using random sampling techniques. The subjects were divided into 2 groups, namely the group given the treatment of as many as 36 people and the control group with as many as 31 people. Instruments used to measure hand muscle strength are using a hand grip dynamometer, arm muscle endurance using a push-ap, abdominal muscle endurance using a sit-ap, Leg muscle strength using a wall sit test, and balance test using a standing stork test. The data analysis technique used is an independent sample t-test followed by a paired sample t-test. The results showed that: 1) There was a significant effect of the circuit bodyweight training method on increasing muscle strength, muscle endurance, and balance in wrestling athletes, in the treatment group evidenced by data on hand muscle strength, hand muscle endurance, abdominal muscle endurance, leg muscle strength, and balance obtained a significance value smaller than 0.05 (p < 0.05). 2) There is a significant difference in influence between the treatment group and the control group on increasing muscle strength, muscle endurance, and balance in wrestling athletes, as evidenced by the average value of hand muscle strength, hand muscle endurance, abdominal muscle endurance, Leg muscle strength, and balance in the treatment group was 60.46 while the average value of hand muscle strength, hand muscle endurance, abdominal muscle endurance, leg muscle strength, and balance in the control group was 48.54 with an average post-test difference of 11.92. So this study concluded that there was a significant increase in hand muscle strength, hand muscle endurance, abdominal muscle endurance, leg muscle strength, and balance before and after treatment, and there was no significant improvement in the control group. The treated group had better hand muscle strength, hand muscle endurance, abdominal muscle endurance, leg muscle strength, and balance compared to the untreated control group.

Keywords
circuit bodyweight training, muscle strength, muscular endurance, balance