Participants
RECRUITMENT
On the bases of the effect sizes and efficacy weights of previous references and experimental research designs [The study was conducted in Jinhua City, Zhejiang Province, China. This research was a randomized controlled trial based on several different physical activity and VR natural environment video interventions. Parents and teachers were required to sign an informed consent form before the experiment, and all children were required to obtain their consent to participate. Moreover, the experimental process needed the help of the kindergarten. To further ensure a smooth and successful experimental process, the directors and teachers of the selected kindergartens and our research team had a previous good working relationship. Therefore, our sampling of young children was based on the principle of convenience sampling. Randomized grouping was used in this study, and independent team members who were not involved in other areas of the project were responsible for random assignment. Each recruited participant was assigned a code, and the replacement blocks were randomized to the specified participant’s experimental or control condition after baseline data were pooled. Throughout the study period, team members responsible for randomization were unaware of the participants’ personal data and data collectors were unaware of the participants’ grouping. The recruitment process is shown in Fig. Consort chart showing the recruitment, random allocation, follow-up, and analysis of the participantsThis study was conducted after obtaining ethical approval from Zhejiang Normal University (Project Number ZSRT2022052) before subject recruitment. We communicated with the kindergarten teachers in advance and received their help. The teachers launched the experiment recruitment and informed the experiment protocol in the kindergarten. Through the students’ raising their hands to sign up, informed consent forms were issued to children who volunteered to participate. Thereafter, they were asked to take home the appropriate contents to be filled out by their guardians and the teacher in charge of the respective children. We provided information to the parents and teachers of the subjects on the experiment details.This experiment eventually recruited 160 small class students in kindergartens in urban areas in Jinhua. To balance the gender factor, we selected the same number of males and females at the time of subject recruitment, and subsequently divided the number of males and females (i.e., 76 each) in each group equally. After excluding 5 subjects who did not complete the experiment and 3 subjects with missing data, 152 subjects completed the experiment and were included in the analysis.