The effect of High Intensity Interval Training (HIIT) tuja shuttle run model on agility and speed of female volleyball school athletes bank Jatim Surabaya

This study aims to evaluate the effectiveness of high-intensity interval training (HIIT) using the Tuja Shuttle Run model in enhancing agility and speed among volleyball athletes. The research employs a quasi-experimental non-equivalent control group design, involving 24 female volleyball athletes from Bank Jatim Surabaya, consisting of 12 athletes in the treatment group and 12 in the control group. Data were collected through pre-test and post-test assessments to measure changes in agility and speed variables. Data analysis was conducted using paired sample t-test and independent sample t-test. The results indicate that the treatment group experienced an average increase in agility of 3.31% and speed of 5.76% following the HIIT Tuja Shuttle Run intervention, while the control group showed no significant changes. These findings conclude that the HIIT Tuja Shuttle Run model is effective in improving agility and speed among athletes (particularly in speed), thereby supporting the application of this method within training programmed to optimize volleyball athlete performance.