Impact of a 12-wk physical conditioning program on the aerobic capacity of aviation cadets

BACKGROUND Flight cadets need to have good physical fitness to cope with the challenges of flying missions.The continuous development of science and technology has led to the constant upgrading of fighter jets and the improvement of their performance,which has resulted in new and higher requirements for the physical fitness of flight personnel.The traditional physical training mode,method,and assessment have been used for many years and do not meet current fitness needs.AIM To investigate the impact of a 12-wk comprehensive anti-G fitness training program on the aerobic capacity of aviation cadets and to evaluate its effectiveness.METHODS Fifty-five cadets were randomly assigned to control and experimental groups using a randomized,single-blind design.The control group maintained their existing training regimen,while the experimental group participated in a 12-wk comprehensive training intervention.The training program comprised strength training twice per week,high-intensity interval training three times per week,and supplemental nutritional and psychological support.Maximal oxygen uptake(VO2max),lower limb strength,and hemoglobin levels were measured at baseline,at 6 wk and 12 wk post-intervention.RESULTS Repeated measures analysis of variance revealed significant differences of both VO2max and relative VO2 in both groups across time points(P<0.05).However,no significant time-group interaction was observed(P>0.05).Paired t-tests comparing baseline and 12-wk results showed that VO2max and relative VO2 were significantly higher in the experimental group than the control group(P<0.05).This suggests that the training program effectively enhanced the aerobic capacity of the experimental group.Key indicators of aerobic capacity,bilateral lower limb strength and hemoglobin levels,were also significantly different over time and between groups(P<0.05).No significant differences were noted in heart-rate metrics(P>0.05).CONCLUSION A 12-wk comprehensive anti-G fitness training program significantly improved the aerobic capacity of aviation cadets,thereby enhancing their overall capacity and laying a physiological foundation for enduring high-G flights.

Relationship between physical activity and specific working memory indicators of depressive symptoms in university students

BACKGROUND The detection rate of depression among university students has been increasing in recent years,becoming one of the main psychological diseases that endangers their physical and mental health.According to statistics,self-harm and suicide,for which there is no effective intervention,are the second leading causes of death.AIM To explore the relationship between different elements and levels of physical activity and college students’depression-symptom-specific working memory indicators.METHODS Of 143 college students were analyzed using the Beck Depression Self-Rating Scale,the Physical Activity Rating Scale,and the Working Memory Task.RESULTS There was a significant difference between college students with depressive symptoms and healthy college students in completing verbal and spatial working memory(SWM)tasks correctly(all P<0.01).Physical Activity Scale-3 scores were significantly and positively correlated with the correct rate of the verbal working memory task(r=0.166)and the correct rate of the SWM task(r=0.210)(all P<0.05).There were significant differences in the correct rates of verbal and SWM tasks according to different exercise intensities(all P<0.05)and different exercise durations(all P<0.05),and no significant differences in the correct rates of verbal and SWM tasks by exercise frequency(all P>0.05).CONCLUSION An increase in physical exercise among college students,particularly medium-and high-intensity exercise and exercise of 30 min or more,can improve the correct rate of completing working memory tasks.

The Effect of Procrastination on Physical Exercise among College Students—The Chain Effect of Exercise Commitment and Action Control

Background:Exercise procrastination is prevalent among college students,causing decline in physical fitness.It is imperative to investigate the mechanism affecting college students’physical activity behaviors.This study was aimed at investigating the effect of procrastination on college students’physical exercise behavior,and the chain mediation effects of exercise commitment and action control(AC),to provide a theoretical basis for interventions targeting physical exercise behavior among college students.Methods:A questionnaire survey was conducted using convenience sampling.The General Procrastination Scale,Exercise Commitment Scale,Action Control Scale,and Physical Activity Rating Scale-3 questionnaires were used.Participants were 581 college students(age 19.27±0.94 years;243 males and 338 females).Statistical methods of regression analysis and structural equation modeling(SEM)were applied.Results:Procrastination,exercise commitment,and action control were found to be significant predictors of physical exercise behavior.Among these predictors,exercise commitment and action control showed full mediation effects in the relationship between procrastination and physical exercise behavior,and explained 25.48%and 30.77%of the total variance,respectively.The chain mediation effect of exercise commitment-action control was significant,accounting for 22.60%of the total variance,and the total indirect effect was 79.33%.Conclusion:Therefore,higher procrastination was associated with less participation in physical exercise behavior among college students.Improvements in exercise commitment and volitional decision-making ability for physical exercise behavior promoted physical exercise behavior,and increased exercise commitment promoted volitional decision-making ability among the students.The chain reaction effect of exercise commitment and action control also buffered the negative effects of procrastination on physical exercise behavior,thereby increasing physical exercise behavior among college students.

The relationship between transport-to-school habits and physical activity in a sample of New Zealand adolescents

Objectives:Adolescents using active transport(AT)to school have higher levels of physical activity(PA)compared with motorized transport(MT)users.This study compared school day and weekend day PA in adolescents using AT,MT,or combined AT and MT(AT + MT)to travel to school.Methods:Adolescents(n= 314;age:14.7±1.4 years;32.8% boys)from Dunedin(New Zealand)wore an accelerometer for 7 days and completed a self-reported survey regarding mode of transport to school(73 AT,56 AT + MT,and 185 MT).Data were analyzed using t tests,analysis of variance,and χ2 tests.Results:Although the proportion of adolescents meeting PA guidelines significantly differed among transport groups(AT,47.9%;AT + MT,46.4%;MT,33.5%;p=0.048;overall,39.2%),the observed differences were due mainly to girls.Compared with MT,AT and AT+MT engaged in more moderate-to-vigorous PA(MVPA)per day(AT:61.2 ± 23.2 min;AT+MT:59.6 ± 21.7 min;MT:52.5 ± 19.6 min;p = 0.004;p<0.001,adjusted for gender),per school day and before school.Immediately after school(15:00-16:00),AT engaged in significantly more MVPA compared with AT + MT and MT.No differences in MVPA between the groups were observed in the late afternoon/early evening period during school days or on weekend days.Conclusion:Compared with MT users,adolescent girls using AT or AT + MT accumulated more MVPA during school commute time.AT + MT to school is also a plausible way to increase adolescent girls’ PA when AT only is not feasible.

Influence of personal and lesson factors on caloric expenditure in physical education

Increasing caloric expenditure in physical education is considered an effective school-based approach to addressing the child obesity epidemic.This study was designed to determine synergistic influences of student characteristics and lesson factors o caloric expenditure in elementary and middle school physical education.Methods:The study used a multi-level design.Level-1 factors included personal characteristics:age,gender,and body mass index.Level-2 factors included lesson length,content,and school level.Based on the Center for Disease Control and Prevention age-gender adjusted growth chart,students in 87 classes from 14 elementary and 15 middle schools were pre-screened into "Overweight","Healthy weight",or “Thin” groups.One boy and one girl were randomly selected from each group in each class as data providers(264 elementary and 294 middle school students).Caloric expenditure was measured in 243 physical education lessons using accelerometers.Results:Analysis of variance revealed and hierarchical linear modeling confirmed separate age by body mass index,age by gender,and content by lesson-length interaction effects,suggesting that the personal and lesson factors influenced caloric expenditure independently.Older male and heavier students burned more calories in all lessons.Students burned more calories in 45-60 min sport skill or fitness lessons than in shorter (30 min)or longer(75-90 min)game or multi-activity lessons.Conclusions:The hypothesized cross-level interaction was not observed in the data.Caloric expenditure can be optimized in 45-60 min sport skill or fitness development lessons.It can be recommended that schools adopt 45-60 min lesson length and provide skill and fitness development tasks in physical education to maximize caloric expenditure.Copyright(c)2012,Shanghai University of Sport.Production and hosting by Elsevier B.V.All rights reserved.

Research on the Importance of Lifelong Education Concept in College Physical Education

With the deepening of physical education reform in colleges and universities in China, especially in recent years, some achievements have been made in the teaching reform of physical education in colleges and universities. In this paper, through the methods of literature, on-the-spot visit and so on, it makes a deep analysis on the reform of college PE teaching and its influence on lifelong education, aiming at making a contribution to the improvement of the college PE teaching system and the development of lifelong education in the national sports.

Influencing of students＇ health status and physical education

Schools and parents should pay attention to health education for students＇ health awareness and good health habits, to establish a correct concept of health. School mental health education should be the first place; school should create a positive learning environment for students to get knowledge and skills of exercising. Especially in the nine years of compulsory education stage, we should ensure necessary physical exercise, reasonable arrangements for extracurricular activities to improve students＇ physical fitness. We should improve the school＇ s sports facilities, and create a good campus atmosphere. Schools should actively carry out extra-curricular sports activities, improve the level of quality of physical education teachers, develop students＇ sports consciousness, and improve material conditions for the students to create a good learning environment, meanwhile, we should increase the content of education, and enrich the content of physical education to enable students to select and reach more sports.

Influence of physical education on anxiety, depression, and selfesteem among college students

BACKGROUND Physical education is pivotal in our country’s education reform.Urban schools have notably enhanced the intensity of physical education in recent years.However,the effects of physical education on students'anxiety,depression,and self-esteem levels,as well as their interrelations,remain unexplored.Compared with the domestic norms,SAS and SDS scores were higher,and SES scores were lower(P<0.05).Among the participants,210(43.93%)had PARS-3 scores below 20,94(19.67%)had scores of 20-42,and 174(36.40%)had scores above 42.After adjusting for daily sleep time,gender,being an only child,major,father’s educational background,mother’s educational background,and family residence,PARS-3 scores were independent influencing factors for anxiety,depression,and low self-esteem(P<0.05).The AUC of PARS-3 scores predicting anxiety,depression,and low self-esteem were 0.805(0.760-0.849),0.799(0.755-0.843),and 0.831(0.788-0.874),respectively.The sensitivities were 0.799,0.801,and 0.748,and the specificities were 0.743,0.716,and 0.814,respectively.PARS-3 was negatively correlated with SAS and SDS scores(r=-0.566,-0.621,both P<0.001)and positively correlated with SES scores(r=-0.621,P<0.001).SES scores were negatively correlated with SAS and SDS scores(r=-0.508,r=-0.518,both P<0.001).CONCLUSION The amount of physical activity is negatively correlated with anxiety and depression degree and positively correlated with self-esteem degree.

Professional Development of Rural Physical Education Teachers from the Perspective of Educational Ecology:A Case Study of Deqing County

Based on the theoretical perspective of educational ecology,the basic situation of professional development of rural physical education teachers in Deqing County and the restricting factors in the process of professional development were investigated and analyzed by using the methods of literature review,questionnaire survey and mathematical statistic analysis,aiming to find out the problems existing in the professional development of rural physical education teachers in Deqing County.The targeted optimization strategies were explored,so as to achieve the effects of enriching the research theory of professional development of rural physical education teachers,improving the quality of physical education in rural schools,inheriting excellent rural sports culture,driving the development of rural mass sports,promoting the construction of rural material and spiritual civilization,and improving the quality of rural human capital.According to the research,the gender structure of rural physical education teachers in Deqing County was unreasonable;the teachers were undertaken heavy teaching task;there was a shortage of highly educated people;some teachers lacked understanding and attention to the connotation of professional development;the teachers had insufficient knowledge of educational science;teachers’sense of responsibility needed to be strengthened;schools did not pay enough attention to teachers’continuing education and training,and teachers were less satisfied with training.

Research on the Effective Ways of Improving the Teaching System of Physical Education Theory in Universities

Through the methods of literature and on-the-spot visit, this paper aims at studying the teaching system of physical education theory and the innovation of teaching methods in colleges and universities, and promoting the perfection of the teaching system of physical education （PE） theory in universities.

Research on Subject Nature and Objective of Physical Education Training

Physical education and training is considered as a new subject among the same type of discipline.It has a short history background and is relatively young.However,the influence of the discipline of physical education and training must not be ignored by simply blaming it as the youngest discipline.In addition,especially in the case of rapid economic development and rapid improvement in living standards today,the influence of this discipline is relatively strong.Therefore,this thesis mainly studies the subject nature and object of physical education training.The research object of this subject can be studied from three key points,such as:the curriculum of the subject,the research method and the research of the subject of education.The comprehensive development of physical education and physical education is a comprehensive discipline.

Research on the Reform and Development of School Sports Education under the Perspective of Lifetime Sports and Nationwide Fitness

In this paper, we conduct research on the reform and development of school sports education under the perspective of lifetime sports and nationwide fitness. School physical education is the foundation and the strategic focus of the development of sports which is the foundation of the national fitness program which is also an important part of the whole education career. Our proposed approach and reform combines the advances of the state-of-the-art methodologies which will not only enhance the current model but set up for prospect and rnnrlifieatinn as well

Overweight, obesity, and screen-time viewing among Chinese school-aged children: National prevalence estimates from the 2016 Physical Activity and Fitness in China—The Youth Study

Purpose: This study presents the most recent estimates of prevalence of overweight, obesity, and screen-time viewing among Chinese school-aged children. Demographic differences in these estimates between sexes and resident locales were also examined.Methods: Cross-sectional analyses of 116,615 Chinese school children 9 to 17 years of age who participated in the 2016 Physical Activity and Fitness in China—The Youth Study project. Outcomes were the prevalence of children's overweight(85 th ≤ body mass index(BMI) < 95 th percentile) and obesity(BMI ≥95 th percentile)(defined by the Working Group on Obesity in China) and not meeting screen-time viewing recommendations("not meeting" was defined as more than 2 h per day of viewing activities after school). Analyses were conducted on the whole sample and by school grade cohorts(primary, junior middle, and junior high schools), sex, and residence locales(urban, rural).Results: Overall, 14.4%(95% confidence interval(CI): 13.8%–15.0%) of children and adolescents were overweight, 11.9%(95%CI: 11.0%–13.0%) were obese, and 36.8%(95%CI: 34.7%–38.9%) did not meet screen-time viewing recommendations. Across the 3-grade cohorts, boys were more likely to be obese than girls, and primary and junior middle school children living in urban areas were more likely to be obese than those living in rural areas. Primary and junior middle school boys were less likely to meet screen-time recommendations than girls, and junior high school children living in urban areas were less likely to meet screen-time recommendations than school children of the same grades living in rural areas.Conclusion: In 2016, the prevalence of obesity among Chinese school children was about 12%, and about 37% of them did not meet screen-time viewing recommendations. The prevalence of obesity and sedentary behavior was generally higher among boys than among girls, and it was higher for children living in urban areas than for those living in rural areas.

School and community physical activity characteristics and moderate-to-vigorous physical activity among Chinese school-aged children： A multilevel path model analysis

Purpose: The purpose of this study was to examine the association between school and community physical activity(PA) characteristics and levels of moderate-to-vigorous physical activity(MVPA) among Chinese school children.Methods: Data were obtained from the 2016 Physical Activity and Fitness in China—The Youth Study project. Participants were 80,928 school children(Grades 4–12; 39,747 boys, 41,181 girls; mean age = 13 years) and 935 physical education(PE) teachers who completed a study survey.Independent variables included both school-related factors(school-level PA support, availability of and access to PA facilities, and the duration of school PE classes) and community-related factors(the frequency of sports events, sports training opportunities, availability of sports clubs and organizations, and access to PA facilities). The dependent variable was the children's self-reported participation in MVPA. The data were analyzed,in 2017, via multilevel modeling.Results: PA support from school administrators was the only school-level factor significantly related to children's participation in MVPA.Children's perceptions of the frequency of community-sponsored sports events, availability of sports clubs and organizations, and convenient access to PA facilities were associated with a high level of MVPA participation. In regard to residency in urban and rural areas, children attending urban schools who perceived high availability of PA facilities were associated with a low level of participation in MVPA.Conclusion: School support for PA and community PA resources are associated with MVPA among Chinese school children. School PA facilities appear underutilized among urban schools as evidenced by low levels of MVPA among school children.

Acute effects of physical exercise in type 2 diabetes: A review

The literature has shown the efficiency of exercise in the control of type 2 diabetes(T2D), being suggested as one of the best kinds of non-pharmacological treatments for its population. Thus, the scientific production related to this phenomenon has growing exponentially. However, despite its advances, still there is a lack of studies that have carried out a review on the acute effects of physical exercise on metabolic and hemodynamic markers and possible control mechanisms of these indicators in individuals with T2 D, not to mention that in a related way, these themes have been very little studied today. Therefore, the aim of this study was to organize and analyze the current scientific production about the acute effects of physical exercise on metabolic and hemodynamic markers and possible control mechanisms of these indicators in T2 D individuals. For such, a research with the following keywords was performed:-exercise; diabetes and post-exercise hypotension; diabetes and excess post-exercise oxygen consumption; diabetes and acute effects in PUBMED, SCIELO and HIGHWIRE databases. From the analyzed studies, it is possible to conclude that, a single exercise session can promote an increase in the bioavailability of nitric oxide and elicit decreases in postexercise blood pressure. Furthermore, the metabolic stress from physical exercise can increase the oxidation of carbohydrate during the exercise and keep it, in high levels, the post exercise consumption of O2, this phenomenon increases the rate of fat oxidation during recovery periods after exercise, improves glucose tolerance and insulin sensitivity and reduces glycemia between 2-72 h, which seems to be dependent on the exercise intensity and duration of the effort.

Associations between parental support for physical activity and moderate-to-vigorous physical activity among Chinese school children： A cross-sectional study

Purpose: The objective of this study was to examine the associations between parental support for physical activity(PA) and levels of moderate-to-vigorous physical activity(MVPA) among Chinese school children.Methods: Study participants were 81,857 school-aged children(aged 9–17 years; mean age = 13 years; 49.0% boys) and their parents or guardians who took part in the 2016 Physical Activity and Fitness in China—The Youth Study project. The independent variables included various forms of parental support for PA ascertained through a survey completed by parents or guardians. The dependent variable was the children's average MVPA in minutes per day by self-report. Structure equation modeling was used to examine the associations between parental support for PA and children's MVPA minutes.Results: The overall mean for MVPA participation time for the child participants was 48.82 ± 28.71 min/day. Significant associations between various forms of parental support and MVPA among children were found. Parental encouragement, accompanying, financial support, involvement,and role modeling for PA were positively associated with a high level of student MVPA participation. Parental PA knowledge-sharing was not associated with MVPA. The patterns of the associations were similar across sex, residence locale(i.e., urban and rural), and school grades(primary,junior middle, and junior high schools).Conclusion: Findings from this study suggest that, among Chinese school children, parental support for PA is important in promoting and facilitating children's participation in MVPA.

Prevalence and correlates of meeting the muscle-strengthening exercise recommendations among Chinese children and adolescents:Results from 2019 Physical Activity and Fitness in China—The Youth Study

Purpose This study aimed to describe the national prevalence of Chinese children and adolescents who met the World Health Organization muscle-strengthening exercise(MSE)recommendations and identify correlates of meeting the MSE recommendations.Methods Cross-sectional data from the 2019 Physical Activity and Fitness in China—The Youth Study,a nationally representative sample of Chinese children and adolescents(n=80,413;mean age=13.7 years;53.9%girls)and their parents,were analyzed.Children and adolescents who reported engaging≥3 days(up to 7 days)of MSE per week were classified as meeting the MSE recommendations.MSE,demographics,lifestyle behaviors(sport participation,moderate-to-vigorous physical activity,screen time,and sleep duration),exercise intention,peer and parental support,and parental MSE participation were assessed through self-reports.Logistic regression models were used to determine the correlates of meeting the MSE recommendations.The analyses were completed in 2020.Results Overall,39.3%of children and adolescents met the MSE recommendations.Girls,10th-12th graders,minorities,those from lower income households and those from families with lower parental education were less likely to meet the MSE recommendations.Children and adolescents who were proficient in≥2 sports were more likely to meet the MSE recommendations(adjusted odds ratio(aOR)=1.44,95%confidence interval(95%CI):1.26-1.65),as were those with more moderate-to-vigorous physical activity(aOR=1.57,95%CI:1.53-1.61).Additionally,children and adolescents with high exercise intention(aOR=1.60,95%CI:1.51-1.69),those whose parents met the adult MSE recommendations(aOR=1.46,95%CI:1.40-1.52),and those who received high peer(aOR=1.27,95%CI:1.20-1.34)and parental support(aOR=1.07,95%CI:1.04-1.12)were more likely to meet the MSE recommendations.Conclusion Less than two-fifths of Chinese children and adolescents met the World Health Organization MSE recommendations.The correlates identified in our study can help inform the development of school and community based strategies and policies to enhance participation in MSE and improve muscular fitness of all Chinese children and adolescents.

Neighborhood environment,physical activity,and quality of life in adults:Intermediary effects of personal and psychosocial factors

Background: Studies have indicated that there is a positive and indirect relationship between physical activity(PA) and quality of life(QoL). The current study examined this relationship through a social cognitive model with consideration to the intermediary effects of exercise self-efficacy,and physical(PCS, physical component summary) and psychological(MCS, mental component summary) health. Additionally, this model was widened to include concepts from the ecological theory, and any causal associations among neighborhood environment, PA, and QoL.Methods: Six hundred and eighty-four physically active adults(39.16 ± 13.52 years, mean ± SD), living in Athens, Greece, completed a series of questionnaires measuring PA, QoL, exercise self-efficacy, PCS, MCS, neighborhood environment, and family and friend support for PA. The examined models were analyzed using structural equation modeling.Results: The social cognitive and ecological models proved to be of appropriate fit. Within the social cognitive model, PA positively affected QoL through the mediating effects of exercise self-efficacy, PCS, and MCS. With regards to the ecological model, neighborhood environment positively influenced QoL through the intermediary effects of family support for PA, exercise self-efficacy, PA, PCS, and MCS.Conclusion: Results indicated that the most important mediators in the examined models were exercise self-efficacy and health. Further, findings demonstrated the role of neighborhood environment in enhancing PA and QoL. Future studies should be carried out applying longitudinal data for a better understanding of these associations over time.

Exergames： neuroplastic hypothesis about cognitive improvement and biological effects on physical function of institutionalized older persons

Exergames can be considered a dual task because the games are performed by a man-videogame interface, requiring cognitive and motor functions simultaneously. Although the literature has shown improvements of cognitive and physical functions due to exergames, the intrinsic mechanisms involved in these functional changes have still not been elucidated. The aims of the present study were（1） to demonstrate the known biological mechanisms of physical exercise regarding muscle adaptation and establish a relationship with exergames; and（2） to present a neurobiological hypothesis about the neuroplastic effects of exergames on the cognitive function of institutionalized older persons. These hypotheses are discussed.

A Dataset on the Status Quo of Health and Health-Related Behaviors of Chinese Youth: A Longitudinal Large-Scale Survey in the Secondary School Students of Shandong Province

This data article describes data acquired from the Database of Youth Health(DYH)program.The DYH program consisted of a multi-wave survey conducted annually in the academic year 2015/2016,2016/2017,2017/2018,and 2020/2021 to investigate the status quo of health and health-related behaviors of Chinese junior and senior high school students.A total of 99,327 students from 186 secondary schools in 17 cities of Shandong province participated in the survey.The dataset is longitudinal and consists of rich parameters in aspects of individual information,social-economic status,social interaction,nutrition and diet,psychological cognition,mental health,school adaptation,quality of life,spare-time physical activity,risk behaviors,and physical fitness evaluation results based on the National Student Physical Fitness and Health 2014.It is the first open shared dataset about Chinese adolescents’health and health-related behaviors.It would be valuable and beneficial for policy makers,educational institutions,and other stakeholders to generate or adjust the existing strategies for improving Chinese adolescents’wellbeing.