Association between outdoor activity, screen time and the performance of 20 meter shuttle run test among children and adolescents
	    		
	    			
	    			
		        		
			        		
		        		
			        
		        		
			        		
		        		
			        
		   		
		   		
		   			
		   		
	    	
    	 
    	10.16835/j.cnki.1000-9817.2022.07.013
   		
        
        	
        		- VernacularTitle:儿童青少年户外活动视屏时间与20 m往返跑成绩的相关性
 
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		ZONG Qiao, XU Shaojun, ZHU Yi, ZHAO Mengya, ZHANG Yi, WANG Xi, SUN Jian, WU Xiaoyan, WAN Yuhui, TAO Fangbiao
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		
		        		
		        		
		        		
		        		
		        			
			        		
			        		Author Information
			        		
		        		
		        		
			        		
			        		
			        			1. Departmetn of Maternal, Child & Adolescent Health, School of Public Health/MOE Key Laboratory of Population Health across Life Cycle, Anhui Medical University, Hefei  (230032) , China
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:期刊文章
 
        	
        	
        		- Keywords:
        			
	        			
	        				
	        				
			        		
				        		Motor activity;
			        		
			        		
			        		
				        		Fixation,ocular;
			        		
			        		
			        		
				        		Time;
			        		
			        		
			        		
				        		Physical endurance;
			        		
			        		
			        		
				        		Regression analysis;
			        		
			        		
			        		
				        		Students
			        		
			        		
	        			
        			
        		
 
        	
            
            
            	- From:
	            		
	            			Chinese Journal of School Health
	            		
	            		 2022;43(7):1011-1014
	            	
            	
 
            
            
            	- CountryChina
 
            
            
            	- Language:Chinese
 
            
            
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		        	Abstract:
			       	
			       		
				        
				        	Objective:To analyze the relationship between outdoor activity, screen time and 20 meter shuttle run test (20 m SRT) score among children and adolescents in Baoan District, Shenzhen, so as to provide scientific basis for the management and promotion of physical health of children and adolescents.
				        	
				        
				        	Methods:Stratified cluster sampling was used to select students from 14 schools in 6 communities in Baoan District of Shenzhen, from April to May 2019. A self designed questionnaire was used to investigate demographic characteristics, outdoor activity duration and screen time of primary and middle school students. A total of 3 192 primary and secondary school students in grade 1-12 were selected from each school. Weight, height and 20 m SRT were measured.
				        	
				        
				        	Results:About 985(30.9%) out of 3 192 primary and middle school students were estimated excellent on 20 m SRT test, with boys being higher than that of girls (34.7% vs 26.3%) ( χ 2=26.43, P <0.01). Logistic regression analysis showed that compared with the group with outdoor activity <2 h/d, the excellent and good performers on 20 m SRT with outdoor activity time ≥2 h/d was higher( OR=1.38, 95%CI =1.12-1.70). Compared with students with screen time ≥2 h/d, the excellent and good performers on 20 m SRT with screen time <2 h/d was higher( OR=1.42, 95%CI=1.17-1.71). Compared with students with outdoor activity  time < 2 h/d and screen time ≥ 2 h/d, students with outdoor activity time ≥2 h/d and video time < 2 h/d had a higher proportion of excellent score on 20 m SRT( OR=1.97, 95%CI =1.46-2.67).
				        	
				        
				        	Conclusion:Increasing outdoor activity and reducing screen time are helpful to improve the performance score of 20 m SRT among primary and secondary school students.