Evidence map›Paper›PMID 40898144›Full record

SynthesisBMC public health2025

Effects of physical activity interventions on physical fitness in preschool children: a meta-analysis of randomized controlled trials and dose-response study.

Yixin Liang, Yong Yang, Yuan Yuan, Lanzhi Chen, Tian Wang, Beibei Luo, Junyu Wang, Jie Zhuang

Abstract readMeta-Analysis
In one paragraph

Synthesis in BMC public health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Yixin LiangSchool of Exercise and Health, Shanghai University of Sport, 399 Changhai Rd, Yangpu District, Shanghai City, 200438, China.
Yong YangSchool of Physical Education, Chaohu University, Hefei City, China.
Yuan YuanDepartment of Sport Industry Studies, Yonsei University, Seoul, Republic of Korea.
Lanzhi ChenSchool of Exercise and Health, Shanghai University of Sport, 399 Changhai Rd, Yangpu District, Shanghai City, 200438, China.
Tian WangSchool of Exercise and Health, Shanghai University of Sport, 399 Changhai Rd, Yangpu District, Shanghai City, 200438, China.
Beibei LuoSchool of Exercise and Health, Shanghai University of Sport, 399 Changhai Rd, Yangpu District, Shanghai City, 200438, China.
Junyu WangSchool of Exercise and Health, Shanghai University of Sport, 399 Changhai Rd, Yangpu District, Shanghai City, 200438, China. 635006994@qq.com.ORCID http://orcid.org/0000-0003-2263-9879
Jie ZhuangSchool of Exercise and Health, Shanghai University of Sport, 399 Changhai Rd, Yangpu District, Shanghai City, 200438, China. zhuangjiesh@163.com.ORCID http://orcid.org/0000-0002-2442-7418

Funding

Shanghai Public Health System GWVI-11.1-31the National Social Science Fund of China CLA210280
6 · The paper itself

Abstract

backgroudTo evaluate the effects of chronic physical activity (PA) interventions on physical fitness (PF) in preschool children and to determine the optimal weekly PA dose for improving specific fitness components through meta-analysis and dose-response analysis.

methodsLiterature searches were conducted in PubMed, Embase, Web of Science, and the Cochrane Central Register of Controlled Trials from database inception to January 4, 2025. Eligible randomized controlled trials (RCTs) involved healthy children aged 3-7 years, applied PA interventions lasting ≥ 4 weeks, and assessed at least one PF component, including muscular strength, cardiorespiratory fitness (CRF), flexibility, coordination, or balance. Meta-analyses used random-effects models to calculate standardized mean differences (SMDs) with 95% confidence intervals (CIs). Bayesian dose-response models with restricted cubic splines were used to explore non-linear associations.

resultsFourteen RCTs (n = 3376) were included. PA interventions significantly improved overall PF (SMD = 0.30; 95% CI: 0.22-0.38), as well as upper muscle strength (SMD = 0.30), lower muscle strength (SMD = 0.29), flexibility (SMD = 0.27), CRF (SMD = 0.29), coordination (SMD = 0.54), and static balance (SMD = 0.38). Dose-response analysis revealed optimal weekly doses of 270 min for overall PF, 260 min for lower muscle strength, 190 min for upper muscle strength and flexibility, 300 min for coordination, and 180 min for static balance. CRF improved linearly up to 380 min/week. Subgroup analyses indicated that session frequency, length, and total duration moderated intervention effects.

conclusionsPA interventions effectively improve physical fitness in preschool children. Optimal weekly doses range from 180 to 380 min, depending on the fitness component. Intervention effectiveness is further moderated by session frequency, duration, and total program length, highlighting the need for tailored PA strategies targeting specific physical fitness outcomes in early childhood. PROSPERO REGISTRATION: CRD42025639632.

Indexed as

ExercisePhysical FitnessCardiorespiratory FitnessChildChild, PreschoolHumansMaleRandomized Controlled Trials as TopicDose–responseExerciseMeta-analysisPhysical activityPhysical fitnessPreschool children

Identifiers

PMID40898144
PMCPMC12406408

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.