The document summarizes a study that examined the effects of circuit training on agility in college male volleyball players. Thirty male students between ages 18-24 were randomly assigned to a training group or control group. The training group underwent an 8-week circuit training program 3 days per week, while the control group did not receive specialized training. Agility was measured by shuttle run tests before and after. Results showed the training group had a significant improvement in agility compared to the control group after the circuit training intervention. The study concluded that circuit training is an effective method for improving agility in young men.