Article(id=1325530030645989685, tenantId=1146029695717560320, journalId=1256213402557890569, issueId=1325529948685091532, articleNumber=null, orderNo=null, doi=10.16835/j.cnki.1000-9817.2025240, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1744732800000, receivedDateStr=2025-04-16, revisedDate=1748966400000, revisedDateStr=2025-06-04, acceptedDate=null, acceptedDateStr=null, onlineDate=1793960586462, onlineDateStr=2026-11-06, pubDate=1756051200000, pubDateStr=2025-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793960586462, onlineIssueDateStr=2026-11-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793960586462, creator=13701087609, updateTime=1793960586462, updator=13701087609, issue=Issue{id=1325529948685091532, tenantId=1146029695717560320, journalId=1256213402557890569, year='2025', volume='46', issue='8', pageStart='1065', pageEnd='1216', issueExtLink='null', onlineDate='null', pubDate='1756051200000', pubDateStr='2025-08-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793960566921, creator='13701087609', updateTime=1793960566921, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=1120, endPage=1124, ext={EN=ArticleExt(id=1325530030880870710, articleId=1325530030645989685, tenantId=1146029695717560320, journalId=1256213402557890569, language=EN, title=Compositional isotemporal substitution effects of recess physical activity on mental health among junior high school students, columnId=1259565859148804482, journalTitle=Chinese Journal of School Health, columnName=Health Education and Promotion, runingTitle=null, highlight=null, articleAbstract=
Objective

To explore the isotemporal substitution effects among different intensities of physical activity within a 10-minute recess period on the mental health of junior high school students, aiming to provide evidence-based references for targeted practical interventions.

Methods

From May to November 2024, a total of 845 junior high school students from Tianjin, Taiyuan and LV Liang in Shaanxi Province, Puyang in Henan Province, Xi'an in Shaanxi Province, Quzhou in Zhejiang Province, and Chaoyang in Liaoning Province were selected by using a combination of stratified random sampling and convenience sampling. ActiGraph wGT3X-BT accelerometers was used to measure physical activity during a 10-minute recess period. Mental health status was assessed with the Depression Anxiety Stress Scale (DASS-21). An isotemporal substitution model was constructed in 1-minute increments to predict the effects of substituting different physical activity behaviors on students' mental health.

Results

During recess, sedentary behavior (SB) was predominant among junior high school students, with an average duration of [7.08(5.85, 7.98)] minutes, while moderate-to-vigorous physical activity (MVPA) accounted for the shortest duration at [0.42(0.21, 0.85)] minutes. There were statistically significant differences in MVPA, LPA and SB time between students of different genders and grades(Z/H=-9.08, -8.34, -9.51;84.87, 126.82, 135.27, all P < 0.01). Isotemporal substitution analysis, adjusted for gender and age, showed that replacing 1 minute of SB with 1 minute of MVPA significantly improved anxiety levels (β=-0.29, 95%CI=-0.53 to -0.04) and overall mental health (β=-0.72, 95%CI=-1.39 to -0.04), with both results reaching statistical significance (both P < 0.05). No significant effects were observed for other substitution patterns (both P>0.05).

Conclusions

Substituting SB with MVPA during a 10-minute recess period exerts a positive impact on the mental health of junior high school students. It is recommended to optimize the daily recess activity structure in schools to enhance students' mental well-being.

, authors=Siji WANG1, Xiubing ZHANG1, Yingzhe SONG2, Jiu CHEN3, Yibing WANG4, Yanmin LIN5, Jun XIE*, 3, authorsList=Siji WANG, Xiubing ZHANG, Yingzhe SONG, Jiu CHEN, Yibing WANG, Yanmin LIN, Jun XIE, authorCompany=null, correspAuthors=Jun XIE, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2025 Chinese Journal of School Health. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1325530031459684663, articleId=1325530030645989685, tenantId=1146029695717560320, journalId=1256213402557890569, language=CN, title=初中生课间身体活动与心理健康的成分等时替代效应, columnId=1259565859903779205, journalTitle=中国学校卫生, columnName=健康教育与健康促进, runingTitle=null, highlight=null, articleAbstract=
目的

探讨初中生课间10 min内不同强度身体活动之间的等时替代对心理健康的影响,为更有针对性地开展实践干预提供参考依据。

方法

于2024年5—11月,采用分层随机抽样结合方便抽样的方法,选取来自天津市、山西省太原市和吕梁市、河南省濮阳市、陕西省西安市、浙江省衢州市、辽宁省朝阳市的845名初中生。利用ActiGraph wGT3X-BT加速度计测量学生课间10 min身体活动时间,采用抑郁-焦虑-压力自评量表(DASS-21)评估学生心理健康水平。以1 min为单位建立等时替代模型预测各活动行为替代后对初中生心理健康产生的影响。

结果

初中生课间以久坐行为(SB)占主导[(7.08(5.85,7.98)min],中高强度身体活动(MVPA)所占时间最低[0.42(0.21,0.85)min]。不同性别、年级学生课间MVPA、轻度身体活动(LPA)及SB时间比较,差异均有统计学意义(Z/H值分别为-9.08, -8.34, -9.51;84.87, 126.82, 135.27,P值均<0.01)。等时替代分析结果显示,在控制性别与年龄的情况下,将1 min SB等时替代为1 min MVPA可改善学生的焦虑水平(β=-0.29,95%CI=-0.53~-0.04)和总体心理健康水平(β=-0.72,95%CI=-1.39~-0.04)(P值均<0.05),其他替代方式均无统计学意义(P值均>0.05)。

结论

在课间10 min,MVPA替代SB对初中生心理健康具有正向效应。建议优化学生在校课间日常活动结构,提升心理健康水平。

, authors=王思积1, 张秀兵1, 宋英哲2, 陈九3, 王逸冰4, 林延敏5, 谢军*, 3, authorsList=王思积, 张秀兵, 宋英哲, 陈九, 王逸冰, 林延敏, 谢军, authorCompany=null, correspAuthors=谢军, authorNote=

王思积(1996-),男,山西吕梁人,在读博士,主要研究方向为儿童青少年健康促进和学校体育学

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谢军,E-mail:
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王思积(1996-),男,山西吕梁人,在读博士,主要研究方向为儿童青少年健康促进和学校体育学

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Comparison of average time per recess spent in MVPA, LPA, and SB among middle school students by genders and grades[M(Q1, Q3), min]

, figureFileSmall=null, figureFileBig=null, tableContent=
组别选项人数统计值MVPALPASB
性别男3990.64(0.29,1.26)2.93(2.02,3.74)6.39(5.02,7.52)
女4460.32(0.16,0.57)2.12(1.48,2.92)7.42(6.60,8.23)
Z值-9.08-8.34-9.51
P值<0.01<0.01<0.01
年级初一3070.67(0.33,1.47)3.22(2.39,3.97)6.10(4.36,7.21)
初二2900.34(0.17,0.63)a2.19(1.55,3.05)a7.34(6.37,8.20)a
初三2480.32(0.17,0.62)a2.02(1.47,2.70)ab7.55(6.82,8.19)a
H值84.87126.82135.27
P值<0.01<0.01<0.01
), ArticleFig(id=1325530036308300143, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530030645989685, language=CN, label=表1, caption=

不同组别初中生课间MVPA、LPA和SB时间比较[M(Q1,Q3), min]

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组别选项人数统计值MVPALPASB
性别男3990.64(0.29,1.26)2.93(2.02,3.74)6.39(5.02,7.52)
女4460.32(0.16,0.57)2.12(1.48,2.92)7.42(6.60,8.23)
Z值-9.08-8.34-9.51
P值<0.01<0.01<0.01
年级初一3070.67(0.33,1.47)3.22(2.39,3.97)6.10(4.36,7.21)
初二2900.34(0.17,0.63)a2.19(1.55,3.05)a7.34(6.37,8.20)a
初三2480.32(0.17,0.62)a2.02(1.47,2.70)ab7.55(6.82,8.19)a
H值84.87126.82135.27
P值<0.01<0.01<0.01
), ArticleFig(id=1325530036387991920, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530030645989685, language=EN, label=Tab.2, caption=

Compositional linear regression of 10-minute recess activity time distribution and mental health among junior high school students(n=845)

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心理健康活动类型β值P值模型P值模型R2值
压力MVPA-0.840.01<0.010.03
LPA-0.280.07
SB0.560.01
焦虑MVPA-0.510.090.030.01
LPA-0.240.09
SB0.270.16
抑郁MVPA-0.530.080.190.01
LPA-0.160.25
SB0.370.06
总体MVPA-1.880.02<0.010.02
LPA-0.680.07
SB1.200.02
), ArticleFig(id=1325530036459295089, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530030645989685, language=CN, label=表2, caption=

课间10 min行为时间分布与初中生心理健康得分多元线性回归分析(n=845)

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心理健康活动类型β值P值模型P值模型R2值
压力MVPA-0.840.01<0.010.03
LPA-0.280.07
SB0.560.01
焦虑MVPA-0.510.090.030.01
LPA-0.240.09
SB0.270.16
抑郁MVPA-0.530.080.190.01
LPA-0.160.25
SB0.370.06
总体MVPA-1.880.02<0.010.02
LPA-0.680.07
SB1.200.02
), ArticleFig(id=1325530036543181170, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530030645989685, language=EN, label=Tab.3, caption=

Reallocation 1 min between MVPA, LPA, and SB and change in predictive value of mental health among junior high school students[OR(95%CI), n=845]

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心理健康活动类型MVPA↓LPA↓SB↓
压力MVPA↑-0.04(-0.55~0.46)-0.23(-0.50~0.05)
LPA↑1.07(-1.05~3.18)-0.15(-0.39~0.10)
SB↑1.20(-0.78~3.18)0.18(-0.15~0.50)
焦虑MVPA↑-0.23(-0.68~0.22)-0.29(-0.53~-0.04)*
LPA↑1.71(-0.19~3.61)-0.05(-0.27~0.17)
SB↑1.76(-0.02~3.54)0.05(-0.25~0.34)
抑郁MVPA↑-0.14(-0.60~0.32)-0.20(-0.45~0.05)
LPA↑1.17(-0.75~3.09)-0.05(-0.27~0.17)
SB↑1.22(-0.58~3.01)0.05(-0.24~0.35)
总体MVPA↑-0.42(-1.65~0.82)-0.72(-1.39~-0.04)*
LPA↑3.95(-1.21~9.10)-0.25(-0.85~0.35)
SB↑4.18(-0.65~9.00)0.28(-0.52~1.08)
), ArticleFig(id=1325530038204125555, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325530030645989685, language=CN, label=表3, caption=

MVPA、LPA和SB之间重新分配1 min与初中生心理健康预测值变化[OR值(95%CI),n=845]

, figureFileSmall=null, figureFileBig=null, tableContent=
心理健康活动类型MVPA↓LPA↓SB↓
压力MVPA↑-0.04(-0.55~0.46)-0.23(-0.50~0.05)
LPA↑1.07(-1.05~3.18)-0.15(-0.39~0.10)
SB↑1.20(-0.78~3.18)0.18(-0.15~0.50)
焦虑MVPA↑-0.23(-0.68~0.22)-0.29(-0.53~-0.04)*
LPA↑1.71(-0.19~3.61)-0.05(-0.27~0.17)
SB↑1.76(-0.02~3.54)0.05(-0.25~0.34)
抑郁MVPA↑-0.14(-0.60~0.32)-0.20(-0.45~0.05)
LPA↑1.17(-0.75~3.09)-0.05(-0.27~0.17)
SB↑1.22(-0.58~3.01)0.05(-0.24~0.35)
总体MVPA↑-0.42(-1.65~0.82)-0.72(-1.39~-0.04)*
LPA↑3.95(-1.21~9.10)-0.25(-0.85~0.35)
SB↑4.18(-0.65~9.00)0.28(-0.52~1.08)
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初中生课间身体活动与心理健康的成分等时替代效应
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王思积 1 , 张秀兵 1 , 宋英哲 2 , 陈九 3 , 王逸冰 4 , 林延敏 5 , 谢军 *, 3
中国学校卫生 | 健康教育与健康促进 2025,46(8): 1120-1124
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中国学校卫生 |健康教育与健康促进 2025 , 46 (8) : 1120 -1124
初中生课间身体活动与心理健康的成分等时替代效应
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王思积(1996-),男,山西吕梁人,在读博士,主要研究方向为儿童青少年健康促进和学校体育学

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王思积(1996-),男,山西吕梁人,在读博士,主要研究方向为儿童青少年健康促进和学校体育学

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王思积1, 张秀兵1, 宋英哲2, 陈九3, 王逸冰4, 林延敏5, 谢军*, 3
作者信息
  • 1首都体育学院体育教育训练学院,北京 100191
  • 2首都体育学院体育人工智能研究院
  • 3首都体育学院休闲与社会体育学院
  • 4首都体育学院体医融合创新中心
  • 5吕梁学院体育与健康系
通讯作者:
谢军,E-mail:
作者简介:

王思积(1996-),男,山西吕梁人,在读博士,主要研究方向为儿童青少年健康促进和学校体育学

Compositional isotemporal substitution effects of recess physical activity on mental health among junior high school students
Siji WANG1, Xiubing ZHANG1, Yingzhe SONG2, Jiu CHEN3, Yibing WANG4, Yanmin LIN5, Jun XIE*, 3
Affiliations
  • 1Institute of Physical Education and Training of Capital University of Physical Education and Sports, Beijing 100191, China
出版时间: 2025-08-25 doi: 10.16835/j.cnki.1000-9817.2025240
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目的

探讨初中生课间10 min内不同强度身体活动之间的等时替代对心理健康的影响,为更有针对性地开展实践干预提供参考依据。

方法

于2024年5—11月,采用分层随机抽样结合方便抽样的方法,选取来自天津市、山西省太原市和吕梁市、河南省濮阳市、陕西省西安市、浙江省衢州市、辽宁省朝阳市的845名初中生。利用ActiGraph wGT3X-BT加速度计测量学生课间10 min身体活动时间,采用抑郁-焦虑-压力自评量表(DASS-21)评估学生心理健康水平。以1 min为单位建立等时替代模型预测各活动行为替代后对初中生心理健康产生的影响。

结果

初中生课间以久坐行为(SB)占主导[(7.08(5.85,7.98)min],中高强度身体活动(MVPA)所占时间最低[0.42(0.21,0.85)min]。不同性别、年级学生课间MVPA、轻度身体活动(LPA)及SB时间比较,差异均有统计学意义(Z/H值分别为-9.08, -8.34, -9.51;84.87, 126.82, 135.27,P值均<0.01)。等时替代分析结果显示,在控制性别与年龄的情况下,将1 min SB等时替代为1 min MVPA可改善学生的焦虑水平(β=-0.29,95%CI=-0.53~-0.04)和总体心理健康水平(β=-0.72,95%CI=-1.39~-0.04)(P值均<0.05),其他替代方式均无统计学意义(P值均>0.05)。

结论

在课间10 min,MVPA替代SB对初中生心理健康具有正向效应。建议优化学生在校课间日常活动结构,提升心理健康水平。

运动活动  /  精神卫生  /  等时替代  /  学生
Objective

To explore the isotemporal substitution effects among different intensities of physical activity within a 10-minute recess period on the mental health of junior high school students, aiming to provide evidence-based references for targeted practical interventions.

Methods

From May to November 2024, a total of 845 junior high school students from Tianjin, Taiyuan and LV Liang in Shaanxi Province, Puyang in Henan Province, Xi'an in Shaanxi Province, Quzhou in Zhejiang Province, and Chaoyang in Liaoning Province were selected by using a combination of stratified random sampling and convenience sampling. ActiGraph wGT3X-BT accelerometers was used to measure physical activity during a 10-minute recess period. Mental health status was assessed with the Depression Anxiety Stress Scale (DASS-21). An isotemporal substitution model was constructed in 1-minute increments to predict the effects of substituting different physical activity behaviors on students' mental health.

Results

During recess, sedentary behavior (SB) was predominant among junior high school students, with an average duration of [7.08(5.85, 7.98)] minutes, while moderate-to-vigorous physical activity (MVPA) accounted for the shortest duration at [0.42(0.21, 0.85)] minutes. There were statistically significant differences in MVPA, LPA and SB time between students of different genders and grades(Z/H=-9.08, -8.34, -9.51;84.87, 126.82, 135.27, all P < 0.01). Isotemporal substitution analysis, adjusted for gender and age, showed that replacing 1 minute of SB with 1 minute of MVPA significantly improved anxiety levels (β=-0.29, 95%CI=-0.53 to -0.04) and overall mental health (β=-0.72, 95%CI=-1.39 to -0.04), with both results reaching statistical significance (both P < 0.05). No significant effects were observed for other substitution patterns (both P>0.05).

Conclusions

Substituting SB with MVPA during a 10-minute recess period exerts a positive impact on the mental health of junior high school students. It is recommended to optimize the daily recess activity structure in schools to enhance students' mental well-being.

Motor activity  /  Mental health  /  Isotemporal substitution  /  Students
王思积, 张秀兵, 宋英哲, 陈九, 王逸冰, 林延敏, 谢军. 初中生课间身体活动与心理健康的成分等时替代效应. 中国学校卫生, 2025 , 46 (8) : 1120 -1124 . DOI: 10.16835/j.cnki.1000-9817.2025240
Siji WANG, Xiubing ZHANG, Yingzhe SONG, Jiu CHEN, Yibing WANG, Yanmin LIN, Jun XIE. Compositional isotemporal substitution effects of recess physical activity on mental health among junior high school students[J]. Chinese Journal of School Health, 2025 , 46 (8) : 1120 -1124 . DOI: 10.16835/j.cnki.1000-9817.2025240
青春期是个体发展的关键时期,个体的身心和社会适应方面都会发生巨大变化。调查发现,在全球10~19岁人群中,1/7有心理卫生问题,占该年龄组全球疾病负担的15%[1]。为应对这一挑战,教育部等十七部门推出了《全面加强和改进新时代学生心理健康工作专项行动计划(2023—2025年)》,强调了五育并举促进儿童青少年心理健康水平,同时提出以体强心的重要实践路径[2]。
身体活动对青少年心理健康具有积极影响,可有效调节个体情绪状态,减少心理问题[3]。反观低身体活动者则更容易产生抑郁、焦虑等心理健康问题[4]。近年来,关于青少年24 h身体活动与心理健康关系的研究逐渐增多。久坐行为(sedentary behaviour, SB)、中高强度身体活动(moderate-to-vigorous physical activity, MVPA)、轻度身体活动(light physical activity, LPA)等共同构成了青少年24 h的活动模式。基于24 h活动的成分等时替代研究表明,久坐行为是导致青少年心理健康水平下降的关键因素,将一定时间的久坐行为替换为相同时间较为活跃的身体活动能够提高其心理健康水平[5-6]。本研究根据初中生上学日活动行为模式,探讨基于课间久坐行为的等时替代对心理健康的影响,为具体的剂量效应研究以及更有针对性地开展实践干预提供参考依据。
运用分层随机抽样与方便抽样相结合的方式选取研究对象。以地区与年级为分层变量,每所学校每个年级随机抽取至少20名学生。西南地区因调查时段冲突而导致样本获取受限,采用邻近地区具备相似特征的学校进行方便抽样补充,共计补充样本94人。于2024年5—11月在天津市、山西省太原市和吕梁市、河南省濮阳市、陕西省西安市、浙江省衢州市、辽宁省朝阳市10所中学进行测试,测试前至教室向受试学生进行自我介绍并说明研究目的,征得学生和家长同意后对学生进行基本健康筛查。纳入标准:(1)初中学生;(2)无精神病史和脑部损伤史;(3)无认知障碍;(4)听力、视力(或矫正视力)正常;(5)能够用汉语进行正常交流。共测试学生960名,最终纳入学生845名,有效率88.02%。其中男生399名(47.22%),女生446名(52.78%);初一学生307名(36.33%),初二290名(34.32%),初三248名(29.35%);平均年龄(13.89±1.16)岁。本研究获得首都体育学院学术委员会伦理道德专门委员会审批(审查批准号:2024A010)。
采用ActiGraph wGT3X-BT加速度计测量受试者一周上学日的身体活动时间。加速度计佩戴于髋部,除洗澡、游泳等涉水活动外需全程佩戴。测试结束后使用ActiLife version 6.13.6软件进行数据处理与分析。由于本研究不涉及学生周末活动时间,因此将有效数据定义为每日醒时佩戴至少10 h,且至少包含2个上学日[7]。选择Evenson的算法[8],0~100 counts/min为SB,101~2 295 counts/min为LPA,2 296~4 011 counts/min为中等强度身体活动,≥4 012 counts/min为高强度身体活动。
采用抑郁-焦虑-压力自评量表简版(Depression Anxiety and Stress Scale,DASS-21)[9]调查学生抑郁、焦虑和压力等常见的心理健康问题。DASS-21简体中文版量表包含21个条目,抑郁、焦虑和压力3个分量表(各含7个条目)。采用Likert 4级评分(0=正常~3=非常严重),总分0~63分,分值越高代表心理健康水平越低,量表评级包括正常、轻度、中度、重度和非常严重。本研究中该量表的Cronbach α系数为0.91。
施测前组织统一培训,确保施测人员熟练掌握操作流程。测试中通过标准化讲解与现场监督,指导受试者正确配戴加速度计,并依流程识别非穿戴时间与异常值。问卷调查过程中,严格执行填写指导、问卷核查与无效数据剔除流程,确保数据的完整性与可靠性。
采用Excel 2022软件建立数据库,利用SPSS 27.0软件进行统计学分析。首先对课间MVPA、LPA及SB数据进行Shapiro-Wilk检验,结果显示三者均不符合正态分布。由于等时替代分析在建模前需对成分数据进行对数比转换,因此原始数据不符合正态分布不会影响该分析的适用性。计数资料以频数和百分比表示,计量资料以中位数(四分位数)[M(Q1,Q3)] 表示。性别差异采用Mann-Whitney U检验,年级差异采用Kruskal-Wallis H检验,采用Dunn-Bonferroni进行事后两两比较。采用Dumuid等[10]提出的成分分析方法(Compositional Data Analysis, CoDA),运用R 4.3.3软件中Compositions包对学生课间活动数据进行统计分析。计算成分几何均值,描述成分数据的集中趋势和离散程度。采用等距对数比转换(isometric log-ratio transformation, ILR),将成分数据进行等距对数比转换,从而满足经典回归模型对自变量的独立性要求。数据转换后以性别和年龄作为协变量进行多元线性回归分析。研究发现,用1 min左右超短时身体活动替代久坐能够给个体健康带来积极效益[11],因此,据拟合的线性回归模型,评估在课间10 min固定的前提下,预测将1 min的某一身体活动行为等时替代为另一行为对学生心理健康产生的变化。双侧检验水准α=0.05。
由于所测时间段内学生没有睡眠活动,因此仅对MVPA、LPA和SB的分布进行探究。由表1可知,初中生平均每日课间MVPA时间为0.42(0.21,0.85)min,LPA时间为2.47(1.70,3.33)min,SB时间为7.08(5.85,7.98)min。男生课间MVPA和LPA时间均高于女生,SB时间低于女生,差异均有统计学意义(P值均<0.05)。初一年级学生课间MVPA和LPA时间高于初二和初三年级,SB时间低于初二和初三年级;初二年级学生的课间LPA高于初三年级(P值均<0.05)。
在时间占比上,学生大部分课间时间都花费在SB(67.60%)上,其次为LPA(25.70%)和MVPA(6.70%)。男生MVPA、LPA、SB时间占比分别为9.10%,29.30%,61.60%;女生分别为4.70%,2.24%,72.90%。初一年级学生MVPA、LPA、SB时间占比分别为10.20%,31.60%,58.20%;初二年级分别为4.50%,23.20%,72.30%;初三年级分别为5.00%,21.40%,73.70%。
依据变异矩阵可知,MVPA与SB之间的对数比方差最大(1.97),LPA与SB之间最小(0.62),说明LPA与SB的关联程度较高,更容易发生相互转换;MVPA与SB的关联程度较小,两者之间较难发生转换。多元线性回归分析结果显示,MVPA的时间占比与压力、总体心理健康得分呈负相关,SB的时间占比与压力、总体心理健康得分呈正相关,见表2。以1 min为替代时间的结果显示,增加1 min MVPA,减少1 min SB,LPA不变时,初中生焦虑得分减少0.29分,心理健康总分减少0.72分;其余替代均未产生显著性变化。见表3。
本研究发现,初中生上学日平均每日课间MVPA时间为0.42 (0.21,0.85) min,LPA时间为2.47(1.70,3.33) min,SB时间为7.08 (5.85,7.98) min。SB为初中生课间活动的主要内容,整体活动水平偏低。其中女生和高年级学生课间SB时间较长,MVPA和LPA时间较短,表现出年龄及性别差异,学生课间身体活动的活跃度存在下降趋势。通过基于几何均值的成分数据分析及对数比变异矩阵进一步探讨各行为之间的相对依赖关系,结果显示初中生课间10 min活动中,SB与LPA之间最容易发生转换,MVPA与SB之间最难发生转换,提示在课间10 min的时间分配中,学生较难将SB直接替代为MVPA,而较易将SB替代为更为简单的LPA。可能是由于课间时长有限,MVPA对环境与空间的依赖程度较高以及学生个体意愿难以改变与行为习惯固定,学生在较短的课间10 min对于参与MVPA的意愿较低。这一结果与行为科学中关于“逐级替代”策略的建议相符,即通过先由SB转向LPA,再逐步过渡至MVPA的干预路径,可能更符合青少年的行为习惯和接受能力[12]。
以往研究多以全天24 h为参考进行身体活动的成分数据分析,探讨并发现了用较短时间或较长时间的MVPA替代SB均能够有效改善个体的心理健康水平[13-14]。本研究进一步探讨了初中生在一天中具体时间段内的非静态活动行为替代SB所产生的心理健康效益。研究表明,即使进行非常短暂的适量身体活动也可对个体健康产生积极影响[15]。其主要健康效益源于用一定强度的身体活动来中断较长时间的久坐行为,从而减少久坐带来的健康危害。本研究发现,在保持课间总时间不变的前提下,将1 min的SB替代为1 min的MVPA时,初中生焦虑预测得分和总体心理健康预测得分下降,表明替代行为使初中生焦虑水平下降,总体心理健康水平提升。相比之下,将1 min的SB替代为1 min的LPA仅表现出趋势性改善,而其他替代方式均未观察到统计学意义上的差异。提示在课间10 min这一有限时段内,适度引入MVPA可以缓解初中生的焦虑水平,进而带动其总体心理健康水平的提升。MVPA相较于LPA和SB,具有更强的生理激活效应和神经调节作用,能有效减轻焦虑情绪。焦虑作为心理健康问题中的核心变量,其缓解往往能引发个体整体心理状态的积极转变。相比之下,LPA虽然同样具备活动性,但在刺激强度与心理干预效应上略显不足。然而,这并不意味着LPA对健康无益。Dunstan等[16]研究指出,任何强度的身体活动,包括LPA,在减少久坐时间的同时都能带来积极的健康影响。王思积等[17]研究表明,即使是1 min的LPA替代SB,也可能对个体健康促进发挥积极作用[19]。
此外,本研究发现,当LPA或MVPA减少1 min、相应增加SB时,心理健康得分虽有升高趋势,但并不显著,可能反映出短时间内的不良替代行为尚未立即造成可检测的心理损害。Biddle等[18]指出,MVPA对青少年抑郁、焦虑症状具有中等效应的干预效果,而LPA效应较为有限,SB则在超过一定时间长度后才显现负面影响。Chaput等[19]也指出,提高MVPA是提升儿童青少年整体健康的最关键因素之一,尤其是其在24 h行为模式中占比最少,需要开展重点干预。同样,张新宇等[20]的研究表明,课间10 min的非静坐活动行为能够有效改善儿童青少年的心理健康水平。本研究在等时替代分析中采用的是以1 min为单位的微替代模型,并未进一步展开1~10 min的持续替代变化研究,由于总时间较少,采用较多时间大幅替代会远离样本均值,造成模型推断失真。此外,从课间实践情境出发,10 min的时间结构相对紧凑,实际操作中较难实现持续3 min以上的高强度活动替换,因此1 min为单位的替代更贴近教育场景的真实限制。
随着我国“双减”政策的深入,已有部分地区和学校开始尝试将原有10 min课间时长延长至15 min,意图在不挤压课程时间的前提下,为学生提供更加充裕的身体活动机会[21]。在这一背景下,更长时间尺度的行为替代模拟(如5~10 min)将具备更强的现实基础与应用潜力。未来研究可进一步结合政策实践,基于“课间15 min”的新结构,系统评估不同强度活动行为持续替代对青少年心理、身体及社会健康的多维影响,为教育部门和学校设计分层次、可实施、低成本的课间健康干预策略提供实证支持与理论参考。
本研究存在一定的局限性:首先,研究聚焦于课间10 min这一特定短时时段,替代模型以1 min为单位建立,虽具现实可行性,但未能呈现替代对心理健康效益的累积变化趋势,限制了对剂量-效应关系的进一步探讨。其次,由于数据采集依赖于加速度计所记录的行为时间分布,难以全面捕捉学生在课间实际活动中的情境差异与行为质量,可能影响替代效应的外推性与实践适用性。
  • 国家社会科学基金项目(24BTY025);中国科协2024年度研究生科普能力提升项目(KXYJS2024007);天津市教育科学学会2024年度规划课题(JK145240457B)
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2025年第46卷第8期
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doi: 10.16835/j.cnki.1000-9817.2025240
  • 接收时间:2025-04-16
  • 首发时间:2026-11-06
  • 出版时间:2025-08-25
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  • 收稿日期:2025-04-16
  • 修回日期:2025-06-04
基金
国家社会科学基金项目(24BTY025);中国科协2024年度研究生科普能力提升项目(KXYJS2024007);天津市教育科学学会2024年度规划课题(JK145240457B)
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    1首都体育学院体育教育训练学院,北京 100191
    2首都体育学院体育人工智能研究院
    3首都体育学院休闲与社会体育学院
    4首都体育学院体医融合创新中心
    5吕梁学院体育与健康系

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