Effect of Circuit and Interval Training Methods on the Agility and VO₂max of Porprov Football Players in Pati Regency in Terms of Leg Muscle Endurance

This study aimed to determine: (1) the effect of circuit and interval training methods on agility and VO₂max; (2) the difference in the effect of high leg muscle endurance and low leg muscle endurance on agility and VO₂max; (3) the interaction between circuit training, interval training and leg muscle endurance (high and low) on agility and VO₂max. Materials and methods. This research is an experiment with a 2x2 factorial design. In this study, the number of samples used was 20 players selected by purposive sampling. Agility was measured with the Illinois agility test instrument, VO₂max was measured with a multistage fitness test, and leg muscle endurance was measured with a wall sit test. Data analysis used a two-way ANOVA test with a significance level of α < 0.05. Results. The results of this study are as follows: (1) there is no difference in the effect of the circuit and interval training methods on the agility of football players, there are significant differences between the circuit and interval training methods in their effect on the VO₂max of football players; (2) there is a difference between high and low leg muscle endurance for agility and VO₂max, α < 0.05; (3) there is an interaction between the circuit, interval training, and leg muscle endurance (high and low) on agility, α < 0.05. Conclusions. There is an interaction between circuit training, interval training, and leg muscle endurance (high and low) on the agility of Porprov soccer players in Pati Regency. Meanwhile, there was no interaction between circuit training, interval training, and leg muscle endurance (high and low) on the VO₂max of Porprov football players in Pati Regency.