A Study On The Relationship Between Movement Behaviors And Health Status Of Preschool Children

In the field of preschool physical education,people often emphasize and value the health benefits of physical activity(PA),to be precise,of moderate-to-vigorous intensity physical activity(MVPA).Although MVPA is undoubtedly an important health behavior,it only accounts for a small part of the day,and low-intensity physical activity(LPA),sedentary behavior(SB)and sleep dominate the 24 hours a day.Therefore,in recent years,people have gradually emphasized the importance of movement behaviors(PA,SB,and sleep)of preschool children.One of the important manifestations is that major countries and organizations in the world have begun to put forward 24-h movement guidelines for preschool children in recent years.However,limited to the constraints of preschool children’s cognitive development level,movement behaviors evaluation methods,and traditional statistical methods,movement behaviors related research,especially domestic research on the movement behaviors status,is very lacking.The relationship between the physical and mental health of preschool children needs to be further explored.Therefore,the purpose of this study is to monitor the movement behaviors level of preschool children as a whole,and to explore its relationship with health,so as to provide data support for the development of 24-h movement guidelines for preschool children in China,and then promote the healthy growth of preschool children.This research mainly adopts research methods such as literature data method,questionnaire survey method,testing method,expert judgment method and mathematical statistics method.First of all,this study combed the current research status of preschool children’s movement behaviors and its relationship with health,and pointed out the current research deficiencies;Secondly,from the perspective of video observation and analysis,use the children’s PA intensity rating scale as a tool to calibrate and verify the best critical value of the activity count measured by the acceleration sensor in the diagnosis of preschool children’s PA intensity;Third,it reveals the consistency of 4 different sleep assessment methods(sleep questionnaire;sleep log;Sadeh algorithm;Tudor-Locke algorithm)in sleep assessment of preschool children,and demonstrates the automatic sleep algorithm of acceleration sensor-Tudor-Locke algorithm Feasibility in sleep assessment of preschool children;Then,530 preschool children in Changsha City were used as subjects to monitor for 7 consecutive days using a three-axis accelerometer as an evaluation tool,and a self-made questionnaire was used to supplement the survey of the types of SB,revealing the movement behaviors and influencing factors of preschool children;Finally,based on the composition data-isochronous substitution analysis,the physical health benefits and mental health benefits of movement behaviors of preschool children are explored.Through the above theoretical and empirical research,this research mainly draws the following conclusions:1.The optimal threshold for PA and SB of preschool children based on the three-axis acceleration sensor,as well as the selected PA and SB sampling interval and sleep time evaluation algorithm,have certain applicability in the movement behaviors evaluation.2.The proportion of preschool children in Changsha that can meet the recommendations of the 24-h movement guidelines is very low,and will be affected by factors such as gender,age,activity period,and family socioeconomic status.Among them,MVPA,sedentary screen time(SST),and daytime sleep duration(DSP)It is the key factor of whether the recommended amount is satisfied or not.3.The mutual substitution of time spent by different behaviors is different from the physical health of preschool children,and the time of MVPA is particularly important.MVPA has positive physical health benefits when it replaces other behaviors isochronously,among which the health benefits of isochronous replacement of LPA are the best;The benefits of isochronous substitution are asymmetry.With the increase in time for MVPA isochronous substitution of other behaviors,the physical health of preschool children will slowly improve,and vice versa,it will decline rapidly;When MVPA is unchanged,total of sleep time duration isochronously replaces LPA and DSP isochronously replaces LPA,SB and nighttime sleep duration(NSP)all have certain physical health benefits.Future educators need to focus on the overall behavior when improving the physical health of preschool children,Among them,increasing MVPA and reducing LPA may be one of the effective ways to improve the physical health of preschool children.4.The mutual substitution of the time spent by different movement behaviors is different from the mental health of preschool children.Among them,DSP,SST,Non-screen-based sedentary time(NSST)and MVPA time may all have a certain effect.Promoting the moderate conversion of SST to NSST may be an effective way to reduce the psychological and behavioral problems of preschool children.Promoting a moderate increase in DSP and MVPA time may be an effective way to improve the pro-social behavior of preschool children.But in general,the correlation between movement behaviors and preschool children’s mental health is weak,and researchers should be cautious about the relevant research results.