Effect of Fragmented Exercise Snacks on Mobile Phone Addiction and Psychophysical Health in Adolescents: A Randomized Controlled Trial
概览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 发起方
- Jinan University Guangzhou
- 入组人数
- 220
- 试验地点
- 1
- 主要终点
- Change in Mobile Phone Addiction Severity (assessed by SAS-SV)
概览
简要总结
This study is a randomized controlled trial (RCT) designed to evaluate the long-term effectiveness of "Exercise Snacks" (fragmented, high-intensity bouts of exercise) in reducing mobile phone addiction among adolescents.
Participants will be randomly assigned to either an intervention group or a control group. The intervention spans 5 months and is followed by a 1-month follow-up period (Month 6). The intervention group will perform short bursts of exercise (e.g., 1-minute sprints, squats) multiple times daily during school breaks. The program is divided into three progressive phases: adaptation, enhancement, and consolidation. The study aims to determine whether this sustained "snack-style" exercise regimen can significantly lower mobile phone addiction scores, improve physical fitness, and enhance psychological traits such as self-control and resilience over a semester-long period.
详细描述
Background and Rationale: Adolescents face increasing risks of mobile phone addiction, which is associated with sedentary behavior. "Exercise Snacks"-isolated bouts of vigorous exercise performed periodically throughout the day-offer a time-efficient solution. This study applies the COMB model and Self-Determination Theory to a long-term, semester-based intervention.
Study Design: This is a single-blind, randomized controlled trial conducted over a 6-month period (5 months of intervention + 1 month of follow-up).
Intervention Protocol: The intervention group follows a progressive "Exercise Snacks" program:
Adaptation Phase (Month 1 / Weeks 1-4): Focus on habit formation. Participants perform "Sprint Snacks" (e.g., stair climbing) 3 times daily and "Strength Snacks" (e.g., squats) 2 times weekly. Intensity is monitored to ensure safety and correct posture.
Enhancement Phase (Months 2-3 / Weeks 5-12): Focus on physiological adaptation. Frequency increases to 4 daily Sprint Snacks and 3 weekly Strength Snacks. A weekly collective High-Intensity Interval Training (HIIT) session is introduced to maximize cardiorespiratory benefits.
Consolidation Phase (Months 4-5 / Weeks 13-20): Focus on psychological integration. Daily snacks continue. Collective HIIT sessions increase to twice weekly. A cognitive-behavioral guidance component is added (bi-weekly) to help students identify phone use triggers and internalize healthy behaviors.
Follow-up Phase (Month 6 / Weeks 21-24): The structured intervention ceases. Participants are encouraged to maintain self-guided exercise. Final assessments are conducted at the end of Month 6 to evaluate the retention of intervention effects and any "rebound" in mobile phone addiction.
Outcome Measures: The primary outcome is Mobile Phone Addiction (SAS-SV), assessed at baseline, Month 3, Month 5 (post-intervention), and Month 6 (follow-up). Secondary outcomes include physical activity levels (PARS-3 and wearables), self-control (BSCS), resilience (RSCA), and mental health status.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Outcomes Assessor)
盲法说明
Due to the nature of the behavioral intervention (exercise training), it is not possible to blind the participants or the instructors to the group allocation. However, outcome assessors and data analysts are blinded to the group assignment to minimize detection and reporting bias. All data will be coded, and the statistical analysis will be conducted without knowledge of group identity.
入排标准
- 年龄范围
- 12 Years 至 18 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Adolescents aged 12-18 years enrolled in the participating middle/high school.
- •Owner of a smartphone with daily usage time \> 2 hours.
- •Score on the Smartphone Addiction Scale-Short Version (SAS-SV) indicating a risk of addiction (e.g., score \> 31 for males, \> 33 for females).
- •Physically capable of participating in high-intensity exercise (PAR-Q screening negative).
- •Provided written informed consent (from both student and guardian).
排除标准
- •Diagnosed with severe physical disabilities or cardiovascular diseases that contraindicate high-intensity exercise (e.g., congenital heart disease).
- •Currently participating in other professional sports training or weight loss programs.
- •Diagnosed with severe psychiatric disorders (e.g., severe depression, schizophrenia) requiring medication.
- •Taking medications that affect heart rate or cognitive function.
研究组 & 干预措施
Exercise Snacks Group
Participants in this group follow a 5-month structured "Exercise Snacks" protocol. The intervention consists of daily short bursts of high-intensity exercise (e.g., 1-minute sprints, squats) performed during school breaks, supplemented by weekly collective HIIT sessions. The program progresses through adaptation, enhancement, and consolidation phases.
干预措施: Exercise Snacks Protocol (Behavioral)
Control Group
Participants in this group are instructed to maintain their usual daily campus life and academic routines without altering their existing physical activity habits. They do not participate in the structured exercise snacks program during the study period.
结局指标
主要结局
Change in Mobile Phone Addiction Severity (assessed by SAS-SV)
时间窗: Baseline, Month 3, Month 5, and Month 6
The severity of mobile phone addiction is measured using the Smartphone Addiction Scale-Short Version (SAS-SV). This self-report scale consists of 10 items. Each item is rated on a 6-point Likert scale ranging from 1 ("Strongly Disagree") to 6 ("Strongly Agree"). The total score is calculated by summing the scores of all 10 items, resulting in a range from 10 to 60. Higher scores indicate a higher level of mobile phone addiction risk.
次要结局
- Self-Control Capacity (BSCS Score)(Baseline, Month 3, Month 5, and Month 6.)
- Psychological Resilience(CD-RISC-10 Score)(Baseline, Month 3,Month 5, and Month 6)
研究者
Ma Ruisi
Lecturer, School of Physical Education, Jinan University
Jinan University Guangzhou