Requiring high school students to take part in public services is good for their physical health because joining in this kind of service is associated with exercise which can prevent the younger generations from having a “sitting all the time” life style. For example, they are asked to clean the street in their area, cut the grasses in old people’s garden, and play outdoors with other kids. If they don’t do these activities, they might spend their free time on video games or keep studying which can easily lead into lots of common health issue such as obesity and eye problems.