Effects of Health-Related Fitness Model to Improve Physical Fitness and Physical Activity in Vocational High School Students

Physical activity and physical fitness have a vital role in enhancing a healthy and active lifestyle for individuals. This study aimed to see the impact of providing a health-related fitness model on physical improvement and vocational high school students' physical activity. The experimental method with randomized control group pretest-posttest design was applied in this research. The sample selection was based on random cluster sampling to select two classes as the experimental group and the control group consisting of 33 students each, with an age range of 16-17. The instruments used in this study were physical fitness test instruments and students' physical activity tests. The data analysis technique used the Mann-Whitney test and t-test to determine the difference in influence between the experimental and control groups. The results showed that overall, the two groups had a positive impact on the improvement of students' physical fitness and physical activity. However, the experimental class showed a significant increase compared to the control class on the physical fitness variable. Meanwhile, in the physical activity variable, there was no significant difference between the two groups. From these findings, the researchers concluded that the health-related fitness model and the direct instruction model could be applied as an alternative for teachers to improve physical fitness and physical activity for vocational high school students. Furthermore, the researcher explicitly suggests the use of health-related fitness models to improve students' physical fitness.