In one study, the researchers observed the classroom participation of nearly 300 children in grade 2 and grade 4 over the course of a school year. Participation is measured by attentive behavior and distraction in class. The former refers to answering questions, raising hands to speak or participating in discussions, while the latter refers to behaviors such as small talk. In the experiment, half of the students stood at high desks while the other half sat. It was found that the students who stood up and listened to the class were more attentive than those who sat.
The statement "Sitting for a long time will increase the pressure on the spine, which is not conducive to the health of students" can best support the above conclusion.