Author:

• Hao Chen - Chen, H. - <chenhao2008518@outlook.com>
ORCID: https://orcid.org/0000-0002-8873-8266

Co-author(s):

• Jing Xu - Xu, J. - <xujing3404@qq.com>
ORCID: https://orcid.org/0000-0001-9946-4769
• Hao Xie - Xie, H. - <miki.xie@gmail.com>
ORCID: https://orcid.org/0000-0003-3066-7589
• Yufen Huang - Huang, Y. - <huang-yu-fen@163.com>
ORCID: https://orcid.org/0000-0002-6566-5420
• Xin Shen - Shen, X. - <shenxintcm@163.com>
ORCID: https://orcid.org/0000-0002-9950-3403
• Fei Xu - Xu, F - <feixu@hznu.edu.cn>
ORCID: https://orcid.org/0000-0001-8989-9603

Abstract:

The aim of the study was toinvestigate the effects of physical activity (PA) onheart rate variability (HRV)in children and adolescents.Weconducted aresearch of Web of Science, PubMed, ScienceDirect, Springer-Link and EBSCO-host. The literature selection and data extraction are completed independently by two authors.The revised Newcastle-Ottawa Scale was used in an investigative analysis to assessbias risk. A total of 21 studies were included.Overall,medium-sized associations were found between PA and low frequency (r = 0.66; 95%CI = 0.60, 0.71) and high frequency(r = 0.52; 95%CI = 0.45, 0.59)in children and adolescents.High PA levelhad significantlyhigherstandard deviation of RR intervals(MD = 22.83; 95%CI = 7.89, 37.77) and root of the mean of the sum of the squares of differences between adjacent RR intervals (MD = 28.35; 95%CI = 15.26, 41.44)in children and adolescents.The effects of PA on HRV wereconsistent in children and adolescents.The relationship between PA and HRV are influenced by the confounding factorsand testing tools.Our systematic review and meta-analysis revealed medium-sized between PA and HRV in children and adolescents.Promoting children's and adolescents' participation in moderate-to-vigorous physical activity (MVPA) will increase parasympathetic nerve activity and decreased sympathetic nerve activity.Our findings support motivating children and adolescents

Keywords:

Physical activity, Heart rate variability, Autonomic nervous system, Children, Adolescents

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