Study on the Influence of New Media on College Students’ Physical Exercise Behavior

New media is becoming an important method to promote physical exercise,and it is also an essential factor affecting the physical exercise behavior of college students.This study takes the influence of new media sports information on college students’physical exercise behavior as the research objective.By using a questionnaire survey and mathematical statistics,545 college students in Shandong Province of China are selected as research samples.Based on the theory of new media exposure,fitness behavior theory,and self-efficacy theory,this study systematically discusses the influence and mechanism of new media exposure on the physical exercise behavior of college students in Shandong Province,so as to help college students improve their physical exercise behavior.

Effects of Physical Exercise and Music Therapy on Cognitive Aspects in Tunisian Patients with Mild Alzheimer’s Type Dementia

Aim: The objective of this research is to highlight the effectiveness of physical exercise and music therapy in older patients with Alzheimer’s disease (AD). Methods: Patients with a mild level of AD were included in this study, divided into the therapy group (TG;N = 30, aged 68 ± 3.2 years) and the control group (CG;N=30, aged 65 ± 2.6 years). The therapy group was enrolled in an exercise-training program (walking, resistance and balance exercises) combined with musical therapy for 10 weeks (three sessions of 60 minutes per week). The Control group was instructed to follow their daily rhythm of life (e.g., rest, reading) under the same conditions. The intervention program was enrolled under the supervision of;one psychologist;a neurologist;two music therapists, and two physiotherapists, all belonging to the same hospital unit. After 10 weeks of participation in the combined program, cognitive parameters were improved in the therapy group measured with the Behavior Pathology in Alzheimer Disease (BEHAVE-AD), (p < 0.05) for activity disturbance, diurnal rhythm disturbances, anxieties and phobias, affective disturbance. The percentage range of improvements is 1.07% to 2.96%. Results: Our results demonstrate that physical exercise combined with music therapy improves cognitive function in patients with Alzheimer’s disease. Conclusions: Physical exercise and music therapy are beneficial combined treatments for improving life quality in older patients. This approach may be useful to help patients with a mild level of Alzheimer’s disease improve their behavioral and psychological parameters.

Treadmill exercise in combination with acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice through the brain-derived neurotrophic factor-and Cygb-associated signaling pathways

A reduction in adult neurogenesis is associated with behavioral abnormalities in patients with Alzheimer's disease.Consequently,enhancing adult neurogenesis represents a promising therapeutic approach for mitigating disease symptoms and progression.Nonetheless,nonpharmacological interventions aimed at inducing adult neurogenesis are currently limited.Although individual non-pharmacological interventions,such as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,have shown limited capacity to improve neurogenesis and cognitive function in patients with Alzheimer's disease,the therapeutic effect of a strategy that combines these interventions has not been fully explored.In this study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in the hippocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 months.Amyloid deposition became evident at 4 months,while neurogenesis declined by 6 months,further deteriorating as the disease progressed.However,following a 4-week multifactor stimulation protocol,which encompassed treadmill running(46 min/d,10 m/min,6 days per week),40 Hz acousto-optic stimulation(1 hour/day,6 days/week),and olfactory stimulation(1 hour/day,6 days/week),we found a significant increase in the number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,the amyloid-beta load in the hippocampus decreased.These findings suggest that multifactor stimulation can enhance adult hippocampal neurogenesis and mitigate amyloid-beta neuropathology in amyloid precursor protein/presenilin 1 mice.Furthermore,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice following multifactor stimulation,as evidenced by Morris water maze,novel object recognition,forced swimming test,and tail suspension test results.Notably,the efficacy of multifactor stimulation in consolidating immature neurons persisted for at least 2weeks after treatment cessation.At the molecular level,multifactor stimulation upregulated the expression of neuron-related proteins(NeuN,doublecortin,postsynaptic density protein-95,and synaptophysin),anti-apoptosis-related proteins(Bcl-2 and PARP),and an autophagyassociated protein(LC3B),while decreasing the expression of apoptosis-related proteins(BAX and caspase-9),in the hippocampus of amyloid precursor protein/presenilin 1 mice.These observations might be attributable to both the brain-derived neurotrophic factor-mediated signaling pathway and antioxidant pathways.Furthermore,serum metabolomics analysis indicated that multifactor stimulation regulated differentially expressed metabolites associated with cell apoptosis,oxidative damage,and cognition.Collectively,these findings suggest that multifactor stimulation is a novel non-invasive approach for the prevention and treatment of Alzheimer's disease.

Effect of cognitive behavior therapy combined with exercise intervention on the cognitive bias and coping styles of diarrhea-predominant irritable bowel syndrome patients

BACKGROUND Irritable bowel syndrome(IBS)is a common digestive system disease with a high incidence rate and is common in women.The cause of IBS remains unclear.Some studies have shown that mental and psychological diseases are independent risk factors for IBS.At present,the treatment of IBS is mainly symptomatic treatment.Clinically,doctors also use cognitive behavioral therapy to improve patients'cognitive ability to diseases and clinical symptoms.In recent years,exercise therapy has attracted more and more attention from scholars.Improving the symptoms of IBS patients through psychosomatic treatment strategy may be a good treatment method.AIM To explore the effects of an intervention of cognitive behavioral therapy combined with exercise(CBT+E)on the cognitive bias and coping styles of patients with diarrhea-predominant irritable bowel syndrome(IBS-D);and to provide a theoretical reference for the management of IBS.METHODS Sixty IBS-D patients and thirty healthy subjects were selected.The 60 IBS-D patients were randomly divided into experimental and control groups.The experimental group was treated with the CBT+E intervention,while the control group was treated with conventional drugs without any additional intervention.The cognitive bias and coping styles of the participants were evaluated at baseline and after 6 wk,12 wk and 24 wk using the Automatic Thoughts Questionnaire(ATQ),Dysfunctional Attitudes Scale(DAS)and Pain Coping Style Questionnaire(CSQ)instruments,and the intervention effect was analyzed using SPSS 17.0 statistical software.RESULTS At baseline,the scores on the various scales showed that all subjects had cognitive bias and adverse coping styles.The IBS Symptom Severity Scale(IBSSSS)scores,ATQ total scores,DAS scores and CSQ scores of the two groups were not significantly different(P>0.05).Compared with baseline,after 6 wk of the CBT+E intervention,there were significant differences in the ATQ scores,the dependence and total scores on the DAS,and the catastrophization,distraction and prayer scores on the CSQ(P<0.05).After 12 wk,there were significant differences in the scores for perfectionism on the DAS and in the scores for reinterpretation,neglect and pain behavior on the CSQ in the experimental group(P<0.05).After 24 wk,there were significant differences in the vulnerability,dependence,perfectionism,and total scores on the DAS and in the catastrophization,distraction and prayer scores on the CSQ in the experimental group(P<0.01).The IBS-SSS scores were negatively correlated with the ATQ and DAS total scores(P<0.05)but were positively correlated with the CSQ total score(P<0.05).CONCLUSION Intervention consisting of CBT+E can correct the cognitive bias of IBS-D patients and eliminate their adverse coping conditions.CBT+E should be promoted for IBS and psychosomatic diseases.

Physical activity,sedentary behaviors,physical fitness,and their relation to health outcomes in youth with type 1 and type 2 diabetes:A review of the epidemiologic literature

Diabetes is a leading chronic disease of childhood and adolescence. In addition to the well-known auto-immune, insulin-dependent diabetes mellitus （type 1 diabetes （T 1D））, the past two decades have witnessed the emergence of type 2 diabetes （T2D） in children and adolescents, which previously was only seen in middle-aged or older adults. One of the key components of diabetes management is physical activity （PA）. The beneficial effects of increased PA and decreased sedentary behavior are extremely important in youth with diabetes because of the markedly increased long-term risk of cardiovascular disease in this population compared to persons without diabetes. This review aims to comprehensively summarize the epidemiologic, observational research published and listed in PubMed between 1970 and 2012 on PA and sedentary behaviors, as well as physical fitness in children and adolescents with T1D and T2D. Additionally, we describe briefly the state of knowledge on perceived barriers of PA in persons with diabetes, with a focus on hypoglycemia. Finally, we provide an overview of the epidemiological literature pertaining to health benefits of increased PA in youth with TID and T2D and briefly discuss the topic of exercise-related hypoglycemia, Copyright ~ 2012, Shanghai University of Sport. Production and hosting by Elsevier B.V. All rights reserved.

Physical activity among Chinese school-aged children:National prevalence estimates from the 2016 Physical Activity and Fitness in China The Youth Study

Purpose: This study was to present national estimates of participating in moderate-to-vigorous physical activity(MVPA) and adherence to the recommendations of 60 min/day of MVPA among Chinese school-aged children and to assess demographic differences in MVPA.Methods: Cross-sectional analyses of data from the 2016 Physical Activity and Fitness in China—The Youth Study. Participants were 90,712 primary, junior middle, and junior high school children(boy: 47%; girl: 53%), recruited from 1204 rural and urban schools across 32 administrative provinces and regions in the Mainland of China. Main outcomes were(a) average MVPA minutes per day in the previous 7 days by self-reports and(b) percentage meeting MVPA recommendations.Results: Average MVPA time was 45.4 min/day, with boys having more MVPA(47.2 min/day) than girls(43.7 min/day) overall and across the 3 school grade categories. About 30% of participants met MVPA recommendations, with a higher percentage of boys(32%) than girls(28%) overall and across the 3 grades categories. Urban school children outperformed rural children in terms of MVPA time. Overall, boys were more likely to meet MVPA recommendations(adjusted odds ratio(a OR) = 1.19, 95% confidence interval(CI): 1.16–1.22) compared with girls; children in higher grades(junior middle(a OR = 0.92, 95%CI: 0.87–0.98) and junior high(a OR = 0.59, 95%CI: 0.53–0.66)) were less likely to meet recommendations compared with primary school children. The odds of meeting recommendations did not differ between urban and rural children(p = 0.07),but urban boys were found to be more likely to meet recommendations compared with rural boys(a OR = 1.14, 95%CI: 1.06–1.19).Conclusion: Overall, the average MVPA minutes per day among Chinese school-aged children is low, and less than one-third of them meet MVPA recommendations. These results were most evident among junior middle and junior high school children and those living rural areas.

Updated overview on interplay between physical exercise,neurotrophins,and cognitive function in humans

The many important benefits of physical exercise also encompass maintenance or improvement of cognitive functions. Among the variousmechanisms underlying the association between physical exercise and brain health, recent evidence attests that neurotrophin receptor signalingmay have an important role, because the activation of this pathway leads to growth and differentiation of new neurons and synapses, supportsaxonal and dendritic growth, fosters synaptic plasticity, and preserves survival of existing neurons. In this review of published evidence, we highlightthat a positive relationship exists between physical exercise and circulating brain-derived neurotrophic factor levels and that the postexercisevariation of this molecule is associated with improvement of neurocognitive functioning. Less clear evidence has instead been published forother neurotrophins, such as nerve growth factor, neurotrophin-3, and neurotrophin-4. Overall, promotion of adequate volumes and intensities ofphysical exercise (i.e., approximately 3 months of moderate-intensity aerobic exercise, with 2—3 sessions/week lasting not less than 30 min)may hence be regarded as an inexpensive and safe strategy for boosting brain-derived neurotrophic factor release, thus preserving or restoringcognitive functions.

Exercise Recommendation with Preferences and Expectations Based on Ability Computation

In the era of artificial intelligence,cognitive computing,based on cognitive science;and supported by machine learning and big data,brings personalization into every corner of our social life.Recommendation systems are essential applications of cognitive computing in educational scenarios.They help learners personalize their learning better by computing student and exercise characteristics using data generated from relevant learning progress.The paper introduces a Learning and Forgetting Convolutional Knowledge Tracking Exercise Recommendation model(LFCKT-ER).First,the model computes students’ability to understand each knowledge concept,and the learning progress of each knowledge concept,and the model consider their forgetting behavior during learning progress.Then,students’learning stage preferences are combined with filtering the exercises that meet their learning progress and preferences.Then students’ability is used to evaluate whether their expectations of the difficulty of the exercises are reasonable.Then,the model filters the exercises that best match students’expectations again by students’expectations.Finally,we use a simulated annealing optimization algorithm to assemble a set of exercises with the highest diversity.From the experimental results,the LFCKT-ER model can better meet students’personalized learning needs and is more accurate than other exercise recommendation systems under various metrics on real online education public datasets.

Longitudinal associations of physical activity and pubertal development with academic achievement in adolescents

Objective: We sought to investigate the longitudinal associations of moderate-to-vigorous physical activity(MVPA) and pubertal development with academic achievement in adolescents.Methods: A total of 635 adolescents(283 boys, 352 girls) aged 11-13 years participated in the study. MVPA was assessed by the Health Behaviour in School-aged Children study questionnaire, and pubertal development was assessed by the Pubertal Development Scale at beginning of the 6 th grade(baseline) and end of the 7 th grade(follow-up). Grade point average(GPA) at the end of Grades 5 and 7 was computed from data acquired from the school registers. The data were analyzed using linear regression and analyses of covariance.Results: In boys, MVPA was positively associated with GPA at baseline after adjustment for age(b = 0.144, 95% confidence interval(CI):0.028-0.260, p = 0.028). In girls, the Pubertal Development Scale was positively associated with GPA at baseline(b = 0.104, 95%CI: -0.004 to0.211, p = 0.058) and follow-up(b = 0.104, 95%CI: -0.002 to 0.211, p = 0.055) after adjustment for age, and these associations strengthened after further adjustment for MVPA(p < 0.05). Adolescents who were inactive at baseline or at baseline and follow-up had lower GPA during followup than their continuously highly active peers(mean difference = -0.301, 95%CI: -0.543 to -0.058, p = 0.009) and all other adolescents(mean difference = -0.247, 95%CI: -0.475 to -0.019, p = 0.029). These differences were greater in girls than in boys.Conclusion: Lower levels of MVPA were associated with lower GPA in boys at baseline. Girls who were continuously inactive had lower GPA over the follow-up period than those who were continuously active. Finally, earlier pubertal development was associated with better academic achievement in girls.

Effects of a multimodal exercise protocol on functional outcomes,epigenetic modulation and brain-derived neurotrophic factor levels in institutionalized older adults:a quasi-experimental pilot study

Epigenetic changes have been shown to be associated with both aging process and aging-related diseases.There is evidence regarding the benefits of physical activity on the functionality,cognition,and quality of life of institutionalized older adults,however,the molecular mechanisms involved are not elucidated.The purpose of this pilot study was to investigate the effects of a multimodal exercise intervention on functional outcomes,cognitive performance,quality of life(QOL),epigenetic markers and brain-derived neurotrophic factor(BDNF)levels among institutionalized older adult individuals.Participants(n=8)without dementia who were aged 73.38±11.28 years and predominantly female(87.5%)were included in this quasi-experimental pilot study.A multimodal exercise protocol(cardiovascular capacity,strength,balance/agility andflexibility,perception and cognition)consisted of twice weekly sessions(60 minutes each)over 8 weeks.Balance(Berg Scale),mobility(Timed Up and Go test),functional capacity(Six-Minute Walk test),cognitive function(Mini-Mental State Examination)and QOL(the World Health Organization Quality of Life-BREF Scale questionnaire)were evaluated before and after the intervention.Blood sample(15 mL)was also collected before and after intervention for analysis of biomarkers global histone H3 acetylation and brain-derived neurotrophic factor levels.Significant improvements were observed in cognitive function,balance,mobility,functional capacity and QOL after the intervention.In addition,a tendency toward an increase in global histone H3 acetylation levels was observed,while brain-derived neurotrophic factor level remained unchanged.This study provided evidence that an 8-week multimodal exercise protocol has a significant effect on ameliorating functional outcomes and QOL in institutionalized older adult individuals.In addition,it was also able to promote cognitive improvement,which seems to be partially related to histone hyperacetylation status.The Ethics Research Committee of Centro Universitário Metodista-IPA,Brazil approved the current study on June 6,2019(approval No.3.376.078).

Effects of cognitive behavior therapy combined with Baduanjin in patients with colorectal cancer

BACKGROUND Cancer-related fatigue(CRF)is the most common concomitant symptom in the treatment of colorectal cancer(CRC).Such patients often present with subjective fatigue state accompanied by cognitive dysfunction,which seriously affects the quality of life of patients.AIM To explore the effects of cognitive behavior therapy(CBT)combined with Baduanjin exercise on CRF,cognitive impairment,and quality of life in patients with CRC after chemotherapy,and to provide a theoretical basis and practical reference for rehabilitation of CRC after chemotherapy.METHODS Fifty-five patients with CRC after radical resection and chemotherapy were randomly divided into either an experimental or a control group.The experimental group received the intervention of CBT combined with exercise intervention for 6 mo,and indicators were observed and measured at baseline,3 mo,and 6 mo to evaluate the intervention effect.RESULTS Compared with the baseline values,in the experimental group 3 mo after intervention,cognitive function,quality of life score,and P300 amplitude and latency changes were significantly better(P<0.01).Compared with the control group,at 3 mo,the experimental group had significant differences in CRF,P300 amplitude,and quality of life score(P<0.05),as well as significant differences in P300 latency and cognitive function(P<0.01).Compared with the control group,at 6 mo,CRF,P300 amplitude,P300 latency,cognitive function and quality of life score were further improved in the experimental group,with significant differences(P<0.01).The total score of CRF and the scores of each dimension were negatively correlated with quality of life(P<0.05),while the total score of cognitive impairment and the scores of each dimension were positively correlated with quality of life(P<0.05).CONCLUSION CBT combined with body-building Baduanjin exercise can improve CRF and cognitive impairment in CRC patients after chemotherapy,and improve their quality of life.

Comparing the effectiveness of karate and fitnes training on cognitive functioning in older adults——A randomized controlled trial

Background：Recent studies demonstrate a slowdown in deterioration of cognitive functioning in old age through aerobic training.There is evidence that the combination of aerobic,balance,and coordination exercises leads to an improvement or maintenance of cognitive functions.Such age-related exercises can especially be found in East Asian martial arts.The purpose of the current study is to verify whether karate training for older adults improves cognitive functioning and,if an improvement can be found,which cognitive field are influenced Methods：Eighty-nine older women and men（mean age：70 years） participated in this study.The participants were randomized into 2 intervention groups（karate group and fitnes group,duration of intervention：5 months） and a control group.All participants had to accomplish a cognitive test battery before and after the intervention.In a secondary study the karate group had an additional intervention for another 5 months.Results：The results show that there is a significan improvement in motor reactivity,stress tolerance,and divided attention only after the 5-month karate training period.Additionally,the results of the secondary study indicate further improvements after 10 months.Conclusion：The 5-month karate training can help to enhance attention,resilience,and motor reaction time,but a training period of 10 months is even more efficient

Sport participation and vigilance in children:Influence of different sport expertise

Purpose： The present study aimed to investigate the relationship between different types of sport expertise （externally-paced vs. self-paced sports） and vigilance performance in children by evaluating the cardiovascular fitness level of the participants. Methods： Three groups of children （11.0 ± 0.2 years） differentiated in terms of their regular sport participation （football players, n = 20; track and field athletes, n = 20; non-athletic controls, n = 20） took part in the study. In one session, participants performed the Leger Multi-stage fitness test to estimate their aerobic fitness level. In another session, participants completed the Psychomotor Vigilance Task （PVT） to evaluate their vigilance performance under 2 conditions of velocity demands （normal vs. speed）. Results： The results revealed that both groups of sport practitioners had higher cardiovascular fitness than non-athlete controls. In contrast, no significant differences in the performance PVT were found between track and field athletes and controls. Crucially, football players showed better performance in the PVT than track and field athletes and controls. These between-group differences were not modulated by the speed demands of the task. Conclusion： The major novel finding of this research points to a positive relationship between sport participation and vigilance performance during childhood. We discuss our results in terms of the different hypotheses put forward in the literature to explain the relationship between regular exercise and cognitive fimctioning： the ＂cardiovascular fitness＂ and the ＂cognitive component skills＂ hypotheses.2018 Published by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license. （http：//creativecommons.org/licenses/by-nc-nd/4.0/）.

What do we know from clinical trials on exercise and Alzheimer's disease?

Alzheimer's disease(AD) is the most common form of dementia in elderly with major symptoms of a general term for memory loss and other intellectual abilities impairment which are serious enough to interfere with daily life.While there is no treatment can prevent and revise the cognitive function impairment in AD,physical activity becomes a potential beneficia intervention for AD.Multiple evidences suggested that exercise in general plays beneficia roles in improving brain function.Most common mechanisms of exercise-induced enhancement of brain function are including alteration of neurogenesis,neuron plasticity,neuronal signaling and receptors,as well as neuronal networks.This mini review includes most recent clinical studies and focuses on the effects of physical exercise,cognitive stimulation,and combination of both physical and cognitive training on protection and rescue cognitive decline in people with AD.

Inter-individual differences in the responses to aerobic exercise in Alzheimer’s disease: Findings from the FIT-AD trial

Background:Despite the strong evidence of aerobic exercise as a disease-modifying treatment for Alzheimer’s disease(AD)in animal models,its effects on cognition are inconsistent in human studies.A major contributor to these findings is inter-individual differences in the responses to aerobic exercise,which was well documented in the general population but not in those with AD.The purpose of this study was to examine inter-individual differences in aerobic fitness and cognitive responses to a 6-month aerobic exercise intervention in community-dwelling older adults with mild-to-moderate dementia due to AD.Methods:This study was a secondary analysis of the Effects of Aerobic Exercise for Treating Alzheimer’s Disease(FIT-AD)trial data.Aerobic fitness was measured by the shuttle walk test(SWT),the 6-min walk test(6MWT),and the maximal oxygen consumption(VO2max)test,and cognition by the AD Assessment Scale-Cognition(ADAS-Cog).Inter-individual differences were calculated as the differences in the standard deviation of 6-month change(SDR)in the SWT,6MWT,VO2max,and ADAS-Cog between the intervention and control groups.Results:Seventy-eight participants were included in this study(77.4±6.3 years old,mean±SD;15.7±2.8 years of education;41%were female).VO2max was available for 26 participants(77.7±7.1 years old;14.8±2.6 years of education;35%were female).The SDR was 37.0,121.1,1.7,and 2.3 for SWT,6MWT,VO2max,and ADAS-Cog,respectively.Conclusion:There are true inter-individual differences in aerobic fitness and cognitive responses to aerobic exercise in older adults with mild-tomoderate dementia due to AD.These inter-individual differences likely underline the inconsistent cognitive benefits in human studies.

Feasibility of breaking up sitting time in mainstream and special schools with a cognitively challenging motor task

Background: Children spend 70% of the school day sitting in class. Classroom-based active breaks can benefit children's physical health, but if the breaks are cognitively demanding(i.e., combine physical exertion and mental engagement), they may also improve focus and cognitive functions. Teachers and students play a crucial role in the successful implementation of active breaks, and their perspectives are critical to the feasibility of these strategies. The aim of this study was to assess the feasibility of implementing a cognitively challenging motor task as an active break in mainstream and special primary schools.Methods: A total of 5 teachers in 2 mainstream schools and 7 teachers in 1 special school(attended by children with neurodevelopmental disorders) attended a 20-min training on how to implement a 4-min cognitively challenging active break, before conducting a feasibility trial(twice a day for 1 week). To understand individual perceptions, one-on-one semistructured interviews were conducted before and after the trial with teachers, and focus group interviews were conducted with typically developing children after the trial. Questions were based on a predefined framework for feasibility studies. All interviews were audio recorded, transcribed and analyzed in NVivo 11 using a framework approach. A total of 12 teachers(11 females; 7 between 20 and 34 years old) and 34 children(16 girls; 9.3 § 1.7 years, mean § SD) participated in the interviews.Results: In mainstream schools, teachers viewed the cognitively challenging motor task as appropriate and potentially beneficial for children's health and focus. Children reported enjoying the active breaks. Teachers in special schools viewed the task as complex and potentially frustrating for children. In both school types, children's disruptive behavior and lack of time were seen as the main potential barriers to implementation. The use of music, videos, visual cards, and support staff were noted as potential facilitators.Conclusion: The cognitively challenging motor task was a feasible way to interrupt children's sitting time and promote physical activity in mainstream schools, but required changes in special schools. Further research could investigate the effectiveness of these types of task interruptions on children's physical and cognitive health.

Nutrition and exercise can attenuate inflammatory and psychobiological changes in hypoxia?

Exposure to hypoxia causes damage in several physiological systems, whose tissues are dependent on the O2 supply. Recently, there has been growing attention on the immunosuppressive and inflammatory potential of the hypoxia, including stimulation, nuclear factor kappa B pathway in macrophages and Th2 response from lymphocytes. These changes may result in transient immunosuppression and happen at the same time to worsening of cognition and other psychobiological aspects. Furthermore, exercise and nutrition, especially glutamine supplementation may provide important role, not pharmacological partially reversing the effects of hypoxia. In fact, recent studies show that moderate exercise can improve cognition in people exposed to hypoxia while the exercise associated with glutamine supplementation can reverse the increase in inflammatory markers and the Th1/Th2 balance. This review aims to bring the light of the discussion about nonpharmacological ways to prevent the effects of hypoxia on the connection between the immune system and the central nervous system.

角色认同、内部动机、主观锻炼体验与青少年锻炼行为的关系研究

目的:运用交叉滞后研究设计,探讨青少年角色认同、内部动机、主观锻炼体验与锻炼行为的因果关系。方法:采用《锻炼认同量表》中的角色认同分量表,《因果控制点知觉量表》的内部动机分量表,《主观锻炼体验量表》的积极幸福感和心理困扰分量表,以及《体育活动等级量表》等,对1091名青少年(45.28%男生)进行为期12周、两阶段的纵向问卷调查。结果:对于青少年,角色认同、内部动机、主观锻炼体验和锻炼行为的性别、学段差异显著(各指标男性皆高于女性,初中生皆高于高中生);角色认同、内部动机、主观锻炼体验与锻炼行为皆具有跨时间的稳定正相关;交叉滞后分析显示,角色认同与内部动机、角色认同与锻炼行为分别存在互为因果的关系,且内部动机能够单向预测12周后的锻炼行为和主观锻炼体验,锻炼行为能够单向预测12周后的主观锻炼体验,主观锻炼体验能够单向预测12周后的角色认同。结论:在青少年体育锻炼情境中,角色认同、内部动机、主观锻炼体验和锻炼行为具有性别、学段的非一致性特征;角色认同与内部动机、角色认同与锻炼行为分别存在互促、互抑关系,且内部动机是锻炼行为、主观锻炼体验的原因变量,锻炼行为是主观锻炼体验的原因变量,主观锻炼体验是角色认同的原因变量。

大变迁时代国民体育锻炼行为的“中国实践”——基于年龄、时期、队列的视角

以实证研究考察社会变迁进程中国民体育锻炼行为的多重形态。从年龄、时期和队列三维视角分析发现,队列趋势主导国民体育锻炼行为变迁,城市化水平提升、高等教育普及、社会保障持续完善间接驱动国民体育锻炼行为的集体改变,这一特点在“50后”中表现最为显著。在时期层面,国民体育锻炼参与程度自2010年开始持续提升,2013年开始进入快速发展期,除整体走向与政策实施、重大事件的发生周期基本吻合外,国民收入水平提升是重要外生力量。从个体生命历程判断,随年龄增长体育锻炼参与程度逐渐降低是一个共性规律,但下降过程中呈现2个不同的速率阶段。国民体育锻炼行为变迁呈现代际的趋同和分化,“60后”“70后”“80后”是驱动城乡趋同的主要力量,性别趋同集中表现在“50后”“60后”“75前”群体中,由高等教育福利获得的机遇差异可能是导致新老代际分化趋势扩大的重要因素。

中国式现代化视域下家庭体育锻炼行为决策模型构建研究

目的:构建家庭体育锻炼行为决策模型,分析家庭体育锻炼行为决策的多维影响因素,为中国式现代化进程中家庭体育行为决策提供参考。方法:采用斯特劳斯(Strauss)编码程序,借助“Nvivo12.0Plus”软件对研究资料进行三级编码,搭建家庭体育锻炼行为决策结构框架;通过项目分析、探索性和验证性因素分析,并借助SPSS24.0和AMOS24.0软件对决策结构指标进行优化,构建家庭体育锻炼行为决策模型。结果:提取410个行为决策标签化节点,抽绎30条内容相对集中的概念,归纳7个核心类属,彼此间相互关联和作用形成家庭体育锻炼行为决策结构框架;决策结构指标优化得到30个观测指标,且通过项目分析检验;探索性因素分析依次剔除3个未通过检验的观测指标,变异累积率趋于稳定,达到63.278%;家庭体育锻炼行为决策模型拟合指数为GFI=0.925、AGFI=0.911、CFI=0.919、RMSEA=0.051;项目信度大于0.3,组成信度大于0.7,收敛效度大于0.36;相关性权重法得出家庭体育锻炼行为决策权重。结论:家庭体育锻炼行为决策模型适配度高,模型拟合理想,模型具备较高的信效度;家庭体育锻炼行为决策受个体特质、家庭氛围、居住环境、家庭资本、生活习惯、时间分配和健康程度7个因子的影响,因子间存在两两配对的相关性,表现为一个七维交互影响的联动机制;决策程度由大到小依次是个体特质、家庭氛围、居住环境、家庭资本、生活习惯、时间分配和健康程度,家庭体育锻炼行为决策通过多个因素的共同作用实现。