An interventional study of School Recess Outdoor Physical Activity Program in Adolescent Health and Physical Activities, sponsored by Kang Zhu. Completed at 1 site in China. Open to participants aged 12 Years to 15 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-09-22.
Sponsored by Kang Zhu · Not applicable, Interventional, and Prevention
Among 132 studies in Motor Activity with a site in China — 41 open to participants now, 49 under way, 1 of them phase 3. Motor Activity · China.
Among the 132 studies in Motor Activity with a site in China, this one is the 32nd largest by enrollment of the 113 interventional ones that give a count, is one of 13 that started in 2025, is one of 105 with no phase, and was the 127th registered.
9,798 studies on the registry are indexed under Motor Activity; 1,910 are open to participants now.
Browse Motor Activity studies →41 of the 132 studies in Motor Activity with a site in China are open now. Recruiting first, the newest first:
Peking University Third Hospital · Sites in China
Ages 35–70
Yang Zhang · Sites in China
Ages 60–79
Shanghai Jiao Tong University School of Medicine · Sites in China
Ages 18–70 · Women only
Peking University People's Hospital · Sites in China
Ages 65+ · Healthy volunteers
Shanghai Zhongshan Hospital · Sites in China
Ages 18+
A study can be open while its sites in China have not opened yet or have stopped. Only those recruiting at a site in China →
Of the 1,201 Motor Activity studies recruiting now, 517 (43%) set no upper age limit and 535 (45%) stop at 75 or younger; 180 take children under 18; 420 take healthy volunteers.
This study: 12 Years to 15 Years · all sexes · healthy volunteers too.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
132 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 1 · Phase 2 3 · Phase 3 3 · Phase 4 2
First in 2005; this study’s year is marked. 13 started in 2025.
By drug class, each counting the studies that test any of its medicines:
This study's enrollment of 200 is above the median of 60 across 8,388 interventional studies indexed under Motor Activity.
Median enrollment 113 across the 113 interventional studies, 221 across the 19 observational. Of the 58 that completed or were terminated, 1 (2%) have results posted.
This tab as a report to print or save as PDF → With an account.
1 of 132 have an industry lead sponsor. The 10 most frequent:
This is the only study on the registry with Kang Zhu as lead sponsor.
Kang Zhu has 1 study filed under Motor Activity — fewer than ten, so there is no comparison to draw.
18 of the studies in Motor Activity with a site in China that are under way reach primary completion within a year, 0 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT07738809Capital University of Physical Education and Sports, ChinaEffects of Exercise Intervention on Sleep Quality and Emotional Problems in College Students With Depressive Symptoms | 2026-11 |
| NCT07755995Xu ShuishuiLatin Dance and Psychological Health in Primary School Children | 2026-11-30 |
| NCT07554027Second Affiliated Hospital, School of Medicine, Zhejiang UniversityEffect of Episodic Future Thinking on Promoting Physical Activity Among Older Adults With Motoric Cognitive Risk Syndrome: A Randomized Controlled Trial | 2026-12 |
| NCT07137520Shenzhen Institutes of Advanced Technology ,Chinese Academy of SciencesThe Impact of Various Exercise Intensities on Energy Expenditure Metabolism | 2026-12 |
| NCT06570083Beijing Normal UniversityMobile-Based Intervention to Promote Physical Activity Among the Elderly | 2026-12-30 |
Among the 132 studies in Motor Activity with a site in China, from their registry updates:
This tab as a report to print or save as PDF → With an account.
Adolescents spend a substantial amount of time at school, and school recess provides an important opportunity for physical activity and recovery from prolonged sedentary behavior. However, insufficient outdoor activity time during school recess has become a concern for adolescent health. This study is designed to examine whether increasing outdoor activity time during school recess can improve physical and mental health outcomes among adolescents. A school-based intervention study will be conducted, in which participants will receive an increased outdoor activity program during recess periods. The intervention will include structured and free outdoor physical activities designed to increase daily physical activity opportunities. Changes in physical activity levels, psychological well-being, and related health indicators will be assessed before and after the intervention.The results of this study may provide evidence for developing effective school-based strategies to promote adolescent physical activity and health.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants in this group will receive a 10-week outdoor physical activity intervention during school recess. During each recess period, students will participate in outdoor physical activities with provided equipment and activity options. Teachers will supervise and guide students during the intervention. Students can choose different activities according to their interests and abilities.
Behavioral: School Recess Outdoor Physical Activity Program
Participants in this group will maintain their usual school recess activities without additional outdoor physical activity intervention.
The intervention consists of a 10-week outdoor physical activity program implemented during school recess. During each recess period, classroom activities will be suspended and students in the intervention group will participate in outdoor physical activities. Various activity equipment and activity options will be provided, allowing students to select activities according to their interests and abilities. Teachers will supervise and guide students during the activities. Students will return to classrooms after the preparation bell rings. The program aims to increase outdoor activity time during school recess and promote physical and mental health among adolescents.
Change in physical activity level assessed by physical activity questionnaire
Physical activity was assessed using the International Physical Activity Questionnaire-Short Form (IPAQ-SF). The questionnaire evaluates vigorous-intensity activity, moderate-intensity activity, walking, and sitting time during the previous 7 days. Physical activity levels were expressed as metabolic equivalent of task minutes per week (MET-min/week), with higher values indicating greater physical activity levels. Sitting time was reported separately as minutes per weekday, with higher values indicating greater sedentary behavior.
Time frame: Baseline and 10 weeks after intervention
Change in mental health status assessed by Chinese Middle School Students Mental Health Scale
Mental health status was assessed using the Mental Health Inventory for Middle School Students in China (MMHI-60) developed by Wang Jisheng. The scale consists of 60 items rated on a 5-point Likert scale. The total score is calculated by summing all item responses, with possible scores ranging from 60 to 300. Higher scores indicate greater mental distress and poorer mental health status.
Time frame: Baseline and 10 weeks after intervention
Change in loneliness assessed by UCLA Loneliness Scale
Loneliness was assessed using the UCLA Loneliness Scale (Version 3). The scale consists of 20 items rated on a 4-point Likert scale ranging from 1 ("Never") to 4 ("Always"). After reverse scoring of positively worded items, total scores are calculated by summing all items, with possible scores ranging from 20 to 80. Higher scores indicate higher levels of loneliness and poorer psychological well-being.
Time frame: Baseline and 10 weeks after intervention
Plan to share: Yes — De-identified individual participant data may be shared with qualified researchers upon reasonable request and after approval by the study investigators and ethics committee.
Ran from Oct 2025 to primary completion in Jan 2026, 3 months.
Of 5,147 non-industry interventional studies with no phase under Motor Activity, half reached primary completion within 17 months of starting (the median), counting those still running; a quarter within 7 and three quarters within 36. This study's 3 months is below that.
Counting every sponsor, half of 5,207 studies reached it within 17 months; a quarter within 7 and three quarters within 36.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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