Objective: To explore the effect of all day physical activity in a 4 week closed training camp on the improvement of body composition and cardiovascular metabolic risk in metabolic unhealthy obese adolescents (MUO), so as to provide stronger evidence for the health promotion of obese adolescents with different metabolic states. Methods: From July to August 2019, 58 obese adolescents aged 10-17 years from a closed training camp in Shenzhen were recruited and their body composition, blood pressure,lipid profile, and fasting blood glucose before admission were measured. They were divided into MUO group( n =31) and metabolic healthy obese (MHO) group( n =27). Using an Actigraphw GT3xBT triaxial accelerometer, the physical activity of the two groups during the whole day from 9:00 to 19:00 in a closed training camp for four weeks was recorded. After the conclusion of the camp, the above indicators were detected to compare the differences between the two groups before and after the intervention and the changes within the group. Results: A total of 51.6% of MUO adolescents transitioned to MHO adolescents; Body weight, BMI Z score, body fat mass, SBP, TG, HDL-C, and FPG had time×group significant interactions( F=11.25, 11.25, 11.04, 4.89, 16.75, 5.92 , 5.57, P <0.05). The main effect of the group showed that before entering the camp, the BMI Z score, SBP, TG, and FPG in the MUO group were higher than those in the MHO group, while the HDL-C was lower than those in the MHO group( F=5.60, 6.62 , 20.21, 10.17, 31.04, P <0.05). The main effect of time showed that the body weight, BMI Z score, body fat mass, SBP, and TG of both groups decreased significantly( P <0.05), and HDL-C only showed a significant increase in the MUO group( P < 0.01 ). There was no significant change in FPG in both groups before and after intervention( P >0.05). The time×group interactions of body fat ratio, DBP, TC, and LDL-C was not significant( P >0.05), and the main effect of the group was not significant( P > 0.05 ), the main effect of time was significant( P <0.01). Conclusion Increased physical activity in the form of closed training camps can help MUO adolescents reduce fat, MUO adolescents should increase physical activity in their daily life to reduce the risk of cardiovascular metabolic diseases.

Objective: To verify the current cut off points of physical activity intensity for adolescents to assess moderate to vigorous physical activity (MVPA) among overweight or obese adolescents. Methods: The total activity counts, heart rate and steps indicators most commonly used to reflect physical activity intensity were adopted, and a total of 15 MVPA cut off points standards for adolescents were included. Ninety four overweight or obese adolescents were tested for walking and running at 3-7 km/h in a free state, while simultaneously wearing MetaMax 3B gas metabolism analyzer, polar belt and actigraph w-GT3x BT triaxial accelerometer to collect energy consumption and activities count, heart rate and steps. Kappa consistency test and paired χ 2 test were used for statistical analysis. Results: Kappa consistency coefficients (0.27-0.53) <0.60 between all cut off points standards and the "gold standard" and the P <0.01, indicating that the consistency is varied and not strong. In the standard diagnosis of each cut points, low sensitivity (49.11-67.59), high specificity (92.50-97.65), high - LR (0.14-0.52, >0.1) and low DOR (8.26-25.19, <30) indicated high rate of misdiagnosis. Low specificity (36.75-69.41), high sensitivity (84.82-96.36) and low + LR (1.52- 9.83 , <10) indicated a high rate of misdiagnosis; AUC of 0.67-0.80 suggested lower diagnostic performance. Conclusion Existing physical activity intensity cut off points for overweight or obese adolescents were not consistent with MVPA and have low diagnostic capabilities. The following criteria of MVPA for overweight or obese adolescents are supposed.

ObjectiveTo study the current status and development trend of research on the executive function in overweight or obesity， and to grasp the research hotspots in this field. MethodsA total of 1 321 literatures relevant to the executive function in overweight or obesity collected in Web of Science Core Collection database from 2010 to 2021 were selected. CiteSpace and VOSviewer were used to generate knowledge graphs for visualization analysis， then the number of articles issued， countries/regions， institutions and the co-occurrence， clustering and burst of keywords were analyzed. Results①In terms of the trend of the number of articles issued from 2010 to 2021， the annual quantity of published articles about the executive function in overweight or obesity presented a rapid growth over 2010-2014， then entered into a slow growth stage over 2014-2017， and emerged a rapid growth over 2017-2021. ②From the perspective of countries / regions， a total of 64 countries and regions participated in the research. The largest number of articles issued in this field was the USA， which had the most frequent cooperation and exchanges with other countries and regions， and exerted the greatest academic influence， occupying the core position of this research field. ③From the perspective of research institutions， a total of 1 627 institutions participated in this research field， among which the Illinois University published the most papers and closely cooperated with many productive institutions， forming a research group with a certain scale. ④From the perspective of keywords， the research content mainly involved dietary behavior research， prevention and intervention research， risk factor assessment， and analysis of the characteristics of different groups. ConclusionResearches on executive function in overweight or obesity have been developing rapidly， attracting international attention and covering a wide range of areas.