Associations of Sedentary Time and Physical Activity with Metabolic Syndrome among Chinese Adults:Results from the China Health and Nutrition Survey

Objective This study aimed to determine the independent and joint associations of sedentary time(ST)and physical activity(PA) with metabolic syndrome(MetS) and its components among Chinese adults.Methods The study analyzed data from 4,865 adults aged ≥ 18 years who participated in the 2009 and2015 China Health and Nutrition Surveys(CHNS). Four types of leisure ST and three types of PA selfreported at baseline were collected. Multivariable logistic regressions were used to determine the independent and joint associations of ST and PA with the odds of MetS or its components.Results For independent effects, higher levels of television time and total leisure ST was associated with higher MetS risk [odds ratio(OR) 1.3, 95% confidence interval(CI) 1.1–1.6, P < 0.001;OR 1.4, 95% CI1.2–1.8, P < 0.001, respectively]. The MetS risk in the computer time > 7 hours/week(h/w) group was higher than that in the < 7 h/w group in(OR 1.5, 95% CI 1.2–1.9). Higher levels of moderate-to-vigorousintensity physical activity(MVPA) and total PA were associated with a lower MetS risk(OR 0.7, 95% CI0.6–0.9, P < 0.001;OR 0.8, 95% CI 0.7–0.9, P < 0.001, respectively). For the joint effects, compared with those reporting the lowest level of total leisure ST(< 14 h/w) and the most active tertile of MVPA(≥ 61.0 MET-h/w), participants reporting the most total leisure ST(≥ 35 h/w) and the lowest level of MVPA(0 MET-h/w) had the highest odds of MetS(OR 2.0;95% CI 1.4–2.7). Except for people reporting ST(14–21 h/w) within the most active tertile of MVPA, the associations in all other groups were significant.With the increase of TV time and decreased MVPA, the odds of MetS almost showed a curve acceleration.Conclusions MVPA and total PA have independent preventive effects, and sedentary behavior(mainly watching TV) has an unsafe effect on MetS and its components. Strengthening the participation of MVPA and combining the LPA to replace the TV-based ST to increase the total PA may be necessary to reduce the prevalence of MetS in Chinese adults.

Relationship between Physical Activity Level, Hepatic Steatosis Presence, Metabolic Syndrome and the Risk of Developing Type 2 Diabetes in Men

Cardiovascular disease, cancer, respiratory and metabolic disease represent 63% of all deaths worldwide and are considered the major causes of morbidity and mortality. Physical inactivity is considered a case of public health, and other behavioral and metabolic risk factors, according to WHO (2011), such as smoking, increased blood pressure, increased blood glucose, hypercholesterolemia, overweight and obesity. The Nonalcoholic Fatty Liver Disease (NAFLD) is the most prevalent liver disease in adults, and can progress and be characterized as hepatic steatosis (HS) which is derived from the accumulation of lipids in hepatocytes, and histopathologic condition is more than 5% of the weight of liver. So, the purpose of this study is to identify the relationship between the physical activity level and the hepatic steatosis presence, metabolic syndrome and the risk of developing type 2 diabetes mellitus in men. We evaluated retrospectively medical records of 1399 men (40.7 ± 8.18 years old) who participated in the protocol of Preventive Health Check-up at Hospital Israelita Albert Einstein from January to October 2011. According to the results, it is concluded that there is a positive association between low physical activity level and the presence of Hepatic steatosis. The results further demonstrate that, despite the high BMI, blood levels of the subjects remained unchanged. Even without a positive association between these variables, the results showed a high risk behavior for the development of diabetes mellitus type 2.

Physical activity levels in American and Japanese men from the ERA-JUMP Study and associations with metabolic syndrome

Background:Metabolic syndrome(MetS) is a global health problem.Physical activity(PA) is a known modifiable risk factor for MetS and individual MetS components.However,the role of PA could differ between sub-populations due to differences in the variability of PA and other MetS risk factors.To examine these differences,multi-country studies with standardized outcome measurement methods across cohorts are needed.Methods:Cross-sectional PA levels(total and domain specific) in healthy middle-aged(44-56 years) men in the Risk Factor Assessment among Japanese and U.S.Men in the Post-World War Ⅱ Birth Cohort(ERA-JUMP) Study(n=730;American:n=417;Japanese:n=313;from population-representative samples in Pittsburgh,Pennsylvania,USA,and Kusatsu,Shiga,Japan) were compared.The relationships between PA levels and MetS(overall and specific components) in/across the American and Japanese sub-cohorts(adjusting for age,smoking,and alcohol consumption)were also assessed using the same instruments(pedometer and validated questionnaire) to measure PA in both cohorts.Results:A total of 510 individuals provided complete data on PA(American:n=265;Japanese:n=245).The American cohort had significantly lower mean±SD steps/day(7878±3399 steps/day) vs.the Japanese cohort(9055±3797 steps/day)(p <0.001) but had significantly higher self-reported moderate-vigorous leisure PA(American:15.9(7.4-30.3) metabolic task equivalent hours per week(MET-b/week) vs.Japanese:4.0(0-11.3) METh/week,p <0.0001).In both sub-cohorts,each 1000 steps/day increase was associated with lower odds of having MetS(American:OR=0.90,95%CI:0.83-0.98;Japanese:OR=0.87,95%CI:0.79-0.95) and the individual MetS component of high waist circumference(American:OR=0.86,95%CI:0.79-0.94;Japanese:OR=0.87,95%CI:0.80-0.95).In the American cohort only,higher self-reported leisure PA(Met-b/week) was associated with lower odds of MetS and high waist circumference(OR=0.98,95%CI:0.97-0.99 for MetS and waist circumference,respectively).Conclusion:Higher total step counts/day had an important protective effect on MetS prevalence in both the Japanese and American cohorts,despite differences in PA levels and other MetS risk factors.The effect of steps/day(across all intensity levels) was much greater than domainspecific moderate-vigorous PA captured by questionnaire,suggesting the need for measurement tools that can best capture total movement when examining the effects of PA on MetS development.

Physical activity of patients with a primary open angle glaucoma

AIM:To assess physical activity(PA)including its intensity in primary open angle glaucoma(POAG).METHODS:PA was characterized by the use of questionnaires:Seven-Day Physical Activity Recall and Historical Leisure Activity Questionnaire.A questionnaire of 36 questions,developed by the authors,was used to assess the level of knowledge about glaucomaRESULTS:The study was conducted among 625 adults.The study group comprised 312 POAG patients aged over 40 y,including 238 women(76%)and 74 men(24%).The control group consisted of 313 adults(>40 years old),including 202(65%)women and 111 men(35%).The duration of current PA with an intensity of 4 metabolic equivalents(METs)was significantly shorter among people with POAG.PA in the past was significantly lower among people from the study group,regardless of gender.The level of glaucoma knowledge in patients with POAG was poor and significantly lower in men.CONCLUSION:Regular PA is an important and underestimated factor predisposing to the progression of POAG.There is a necessity to undertake educational and preventive actions with a view to modify the health behavior of glaucoma patients.

Physical Activity, Mediterranean Diet and Biomarkers-Assessed Risk of Alzheimer’s: A Multi-Modality Brain Imaging Study

Increased physical activity and higher adherence to a Mediterranean-type diet (MeDi) have been independently associated with reduced risk of Alzheimer’s disease (AD). Their association has not been investigated with the use of biomarkers. This study examines whether, among cognitively normal (NL) individuals, those who are less physically active and show lower MeDi adherence have brain biomarker abnormalities consistent with AD. Methods: Forty-five NL individuals (age 54 ± 11, 71% women) with complete leisure time physical activity (LTA), dietary information, and cross-sectional 3D T1-weigthed MRI, 11C-Pittsburgh Compound B (PiB) and 18F-fluorodeoxyglucose (FDG) Positron Emission Tomography (PET) scans were examined. Voxel-wise multivariate partial least square (PLS) regression was used to examine the effects of LTA, MeDi and their interaction on brain biomarkers. Age, gender, ethnicity, education, caloric intake, BMI, family history of AD, Apolipoprotein E (APOE) genotype, presence of hypertension and insulin resistance were examined as confounds. Subjects were dichotomized into more and less physically active (LTA+ vs. LTA-;n = 21 vs. 24), and into higher vs. lower MeDi adherence groups (n = 18 vs. 27) using published scoring methods. Spatial patterns of brain biomarkers that represented the optimal association between the images and the groups were generated for all modalities using voxel-wise multivariate Partial Least Squares (PLS) regression. Results: Groups were comparable for clinical and neuropsychological measures. Independent effects of LTA and MeDi factors were observed in AD-vulnerable brain regions for all modalities (p β load and lower glucose metabolism) were observed in LTA- compared to LTA+ subjects, and in MeDi- as compared to MeDi+ subjects. A gradient effect was observed for all modalities so that LTA+/MeDi+ subjects had the highest and LTA+/MeDi+ subjects had the lowest AD-burden (p < 0.001), although the LTA × MeDi interaction was significant only for FDG measures (p < 0.03). Adjusting for covariates did not attenuate these relationships. Conclusion: Lower physical activity and MeDi adherence were associated with increased brain AD-burden among NL individuals, in-dicating that lifestyle factors may modulate AD risk. Studies with larger samples and longitudinal evaluations are needed to determine the predictive power of the observed associations.

Assessment of physical activity status among pregnant women in southwestern China

Objective: To assess the patterns and intensities of physical activity among pregnant women in southwestern China, which help us create a fitness regimen based on the 2002 American College of Obstetricians and Gynecologists (ACOG) guidelines for exercise during pregnancy. Methods: A cross-sectional study was performed to recruit pregnant women at a prenatal checking visit clinic with the self-administered Chinese version of Pregnancy Physical Activity Questionnaire (PPAQ). Results: A total of 1179 Chinese pregnant women were enrolled, of whom 92.60% were classified as not meeting the ACOG guidelines. By intensity, 47.36% of the score was attributed to light-intensity activities (1.5 to <3.0 metabolic equivalent [MET]) in the first trimester;the other 2 trimesters were similar. By patterns, about 45.15% of the score was attributed to inactivity. More than 82.35% of enrolled pregnant women regarded slowly walking as the most common type of exercise during pregnancy. Conclusions: This study represents a group of Chinese women who maintained an inactive lifestyle, including low-intensity activities and unitary type of exercises during their pregnancy. Health-care providers are advised to provide appropriate physical activity guidelines to pregnant women. Development of MET-hours/week recommendations is warranted to promote greater physical activity during pregnancy.

Negative Association of Domestic Activity and Active Commuting with Metabolic Syndrome in a Chinese Population Aged 35-64 Years

Objective To understand the associations of physical activity domains with metabolic syndrome among a middle-aged Chinese population. Methods In all, 3326 professional adults aged 35-64 years from Beijing and Zhejiang province were recruited with a cluster random sampling method. The Global Physical Activity Questionnaire was modified, and the recommended Asia-Pacific cut-offs of waist circumstance were introduced into the criteria for metabolic syndrome from the Adult Treatment Panel III. A binary logistic regression model was applied to examine the association of all physical activity domains with the risk of the syndrome. Results Participants who engaged in domestic activity for 〉1176 MET-min/week had a 41.6% less chance of having metabolic syndrome [odds ratio （OR）, 0.584; 95% confidence interval （CI）, 0.480-0.710] than those without this activity. In adjusted models, adults who actively commuted for 〉33 MET-rain/week but 〈52g MET-min/week had a 25% less chance of having the syndrome （OR, 0.750; 95% CI, 0.582-0.966） than those who did not. No interaction was detected between the two domains of activity and the syndrome. Conclusion This study highlighted the independently negative association of traffic and house activity with the prevalence of the syndrome in this sample with a generally low level of moderate activity.

《身体活动汇编》(Compendium of Physical Activities):内容、应用与发展

身体活动(physical activity,PA)不足被世界卫生组织认定为全球第四大死亡风险因素,如何应对PA不足是21世纪公共健康领域的一个重要议题,其中,测量、监控、评估PA的能量消耗和强度是寻求“解决之道”的关键环节之一。《身体活动汇编》(Compendium of Physical Activities,CPA)对PA能量消耗进行评估和分类,其由美国Barbara Ainsworth等编创。CPA自1993年发布后,在国外得到广泛认可和应用,并于2000年和2011年进行了2次更新,但其在国内的知晓度、应用率不高,且存在汉语翻译不统一、运用不灵活的现象。为此,在其原版主要创始人Barbara Ainsworth的授权下,笔者翻译了2011年版,完成了《身体活动汇编(汉英对照版)》,并对Barbara Ainsworth进行了采访,全面介绍和阐述CPA的发展历程、主要内容、汉语翻译、情境应用与未来发展,推广这一可直接量化PA能量消耗的工具,规范其汉语翻译,提高其知晓度,并鼓励相关人员使用,提升其应用率和使用灵活度,进而推进我国PA研究与实践的发展。

Metabolic Syndrome and DNA Damage: The Interplay of Environmental and Lifestyle Factors in the Development of Metabolic Dysfunction

The Metabolic Syndrome (MetS) is a complex condition which is characterized by increased risk factor for cardiovascular diseases, such as dyslipidemia, hypertension and central obesity, in addition to increased risk for type 2 diabetes mellitus (T2DM). All of these factors alone have a notable relationship with DNA damage. However, when the risks are combined, the extent for major outcomes being related to DNA damage (cancer), the consequence can be accelerated by the metabolic dysfunction. This article will illustrate the scientific evidence of the role of DNA damage in MetS, as well as discuss the interplay of major risks factors (air pollution, physical inactivity and dietary interventions) in genomic stability.

Modeling on Metabolic Rate and Thermoregulation in Three Layered Human Skin during Carpentering, Swimming and Marathon

Metabolisms play a vital role in thermoregulation in the human body. The metabolic rate varies with the activity levels and has different behaviors in nature depending on the physical activities of the person. During the activity, metabolic rate increases rapidly at the beginning and then increases slowly to become almost constant after a certain time. So, its behavior is as logistics in nature. The high metabolic rate during activity causes the increase of body core temperature up to 39˚C [1] [2]. The logistic model of metabolic rate is used to re-model Pennes’ bioheat equation for the study of temperature distribution in three layered human dermal parts during carpentering, swimming and marathon. The finite element method is used to obtain the solution of the model equation. The results demonstrate that there is a significant change in tissue temperature due to sweating and ambient temperature variations.

Nutritional and Metabolic Profile in Diabetic Patients and Relationship with Metabolic Syndrome

Background & Objectives: Diabetes and metabolic syndrome spread alarmingly throughout the whole world including Algeria, so our study makes the links closer between these two entities and that through studying nutritional, metabolic and physical profiles. Study Design: 204 patients were recruited and interviewed (anthropometric measurements, blood pressure, age, sex, personal and family history, the practice of physical activity and evaluation of food consumption). Patients and Methods: A cross-sectional survey was conducted in the western Algerian region (Sidi Bel Abbes). Patients with MetS are defined according to the criteria of the National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III). Results: The results show that the frequency of the metabolic syndrome is 86.27% with predominance of women (92.15% women vs 80.39% men). The age group most affected by the MetS among women and men is [54 - 79] years. We also note that 51.28% of men present three criteria of MetS, while 65.21% of women have four and five criteria. The results show that the criteria most dominant in men are hypertension and type 2 diabetes, whereas in women, the high waist is the most abundant criterion. Moreover, the whole is underlined by a low physical activity with only 21.56% who practice it regularly (15.95% women vs 28.04% men). The estimate of food intake shows a qualitative imbalance: protein intake is 19.65% in women vs. 19.43% in men represented mainly by vegetable protein (83.72% for women vs. 72.85% for men);lipids intake is characterized by a lower consumption than the recommendation of the Mediterranean diet concerning the mono-unsaturated fatty acids (MUFA) (39.44% among women vs 40.24% at the men), as in poly unsaturated fatty-acids including (PUFA) (23.30% among women vs 23.64% at the men) whereas an increase in the consumption of the saturated fatty-acids (SFA) is observed in the whole population including (37.24% among women vs 36.10% at the men);lower concentration in calcium, magnesium and en fibers;important concentration of sodium and an insufficient contribution of water. Conclusion: We should be aware of the importance of the modulation of these risk factors through harmonization of “lifestyle” to prevent the occurrence of metabolic syndrome.

肥胖症患者减重代谢手术后体力活动的研究进展

对肥胖症患者减重代谢手术后体力活动现状、影响因素、体力活动改善策略以及体力活动效果评价指标进行综述,以期为医护人员采取有效措施改善患者体力活动水平提供依据。

2种杀菌剂对茉莉根际土壤酶活性和微生物碳源代谢多样性的影响

本研究在人工温室大棚条件下,以白绢病染病茉莉植株根际土壤为材料,分析比较2种杀菌剂(氟啶胺和戊唑醇)处理对土壤理化性质、土壤酶活性及土壤微生物群落碳源代谢多样性的影响。结果表明:在2种不同浓度杀菌剂处理前后,茉莉根际土壤理化性质各项指标具有显著差异。50%氟啶胺处理后,土壤pH和有机质含量分别降低14.8%和18.8%,而50%戊唑醇处理后,有机质含量则显著增加,增幅高达76.8%;50%戊唑醇对土壤全氮、有效磷、速效钾的影响最为显著,其中,全氮最高增幅为77.8%;有效磷最高增加了1.3倍;速效钾最高增幅达2.1倍。杀菌剂对茉莉根际土壤蔗糖酶、脲酶、酸性磷酸酶活性具有显著影响。50%氟啶胺处理后,蔗糖酶活性显著降低92.8%;50%戊唑醇处理后,脲酶活性显著降低,较喷施前减少41.9%;杀菌剂处理后酸性磷酸酶活性均呈递增的变化趋势。比较2种杀菌剂处理后土壤微生物群落的碳源代谢多样性发现,CK的平均每孔颜色变化率(AWCD)最低,2种杀菌剂处理后,AWCD均降低,且戊唑醇对AWCD的抑制作用最显著。总体上,杀菌剂处理后,土壤微生物Shannon-Wiener多样性指数(H)与McIntosh均匀度指数(U)均呈下降趋势,各处理间的Simpson优势度指数(D)无显著差异;土壤微生物群落对6类碳源的代谢能力具有一定的抑制作用。土壤微生物群落碳源利用能力的主成分分析表明,氨基酸类和碳水化合物2类碳源的利用率相似,多聚物类和羧酸类相似。本研究结果可为评估杀菌剂处理后茉莉根际土壤微生物的生态功能提供科学依据。

体力活动水平与子宫肌瘤发生关系的研究

目的探讨体力活动水平与中老年女性子宫肌瘤发生的关系。方法采用以医院为基础的病例对照研究方法。病例组是由35～62岁的382例子宫肌瘤患者组成,对照组是由同期入住相同医院按年龄进行频数匹配的382例非子宫肌瘤患者组成。采用自行设计的健康状况调查表对两组人群进行调查,内容包括人口学特征、生活方式以及疾病既往史等。同时还采用国际体力活动调查表(IPAQ)对两组人群的体力活动情况进行调查,将每周进行的不同体力活动所花费的时间转换成代谢当量(MET)。应用多因素Logistic回归分析估计不同体力活动与子宫肌瘤关联的比值比(OR)及其相应的95%可信区间(CI)。结果调整了多种潜在性混杂因素后,与总体力活动量≤137.20MET-h/周相比较,总体力活动量为178.11～229.35 MET-h/周发生子宫肌瘤的危险性降低〔OR=0.586,95%CI(0.453,0.946),P=0.002〕。在职业性体力活动中,与体力活动量为最低四分位数相比较,体力活动量为第三个四分位数发生子宫肌瘤的危险性降低〔OR=0.622,95%CI(0.415,0.960),P=0.003〕。而在家务劳动中,体力活动量≥28.81 MET-h/周发生子宫肌瘤的危险性是体力活动量≤8.70 MET-h/周的近1.5倍〔OR=1.492,95%CI(1.006,2.049),P=0.030〕。娱乐性体力活动和交通性运动与发生子宫肌瘤的危险性无关(P>0.05)。但是,高强度体力活动(>6 METs)每周活动时间为≥4.51 h能降低发生子宫肌瘤的危险性〔OR=0.601,95%CI(0.402,0.997),P=0.011〕。结论进行适度的体力活动,可能有助于预防子宫肌瘤。

浙江省成年居民体力活动模式与影响因素研究

目的探讨浙江省成年居民体力活动模式与主要影响因素。方法利用2002年浙江省居民营养与健康状况调查数据,以代谢当量为基础对多阶段整群随机抽取3226名成年居民的体力活动现状进行测算分析与影响因素的单因素方差分析。结果低与中高强度体力活动分别占成年居民周体力活动总量52.13%、47.87%,成年居民体力活动来源依次为职业、家务、休闲活动和交通出行,分别占56.41%、20.07%、13.57%和9.95%;居民周体力活动总量与周中高强度体力活动量在城乡、年龄、性别、文化程度、职业、婚姻、家庭收入间差异均有统计学意义(P<0.05)。结论浙江省成年居民体力活动总体已呈现低强度主体模式,职业劳动仍是中高强度体力活动的主要来源;城市、年龄35岁以下、女性、无配偶、高学历、高收入居民应作为重点干预人群。

中国健康成年人身体活动能量消耗参考值

目的:编制中国健康成年人(18~64岁)身体活动汇编(compilation of physical activities,CPA),对身体活动(physical activity,PA)进行分类并提供能量消耗参考数值。方法:计算机检索PubMed,EMbase,Scopus,Ebsco,Web of Science,WANFANG DATA和CNKI数据库,以及国家科技报告服务系统、国家人口与健康科学数据共享平台和公共卫生科学数据中心等,搜集与中国健康人群PA能量消耗相关资料,检索时限均从建库至2022年1月31日,由2位评价员独立筛选、提取、分类和汇总资料。结果:共汇编13类、241种身体活动,提供了具体PA的详细描述和代谢当量值。结论:本研究创编了中国第一版18~64岁健康成年人身体活动汇编,为经常进行体育锻炼人群、研究人员、教育工作者、健身专业人员以及卫生或商业部门提供了宝贵的资源,未来可在中国版CPA基础上针对不同年龄段开展多种PA能量消耗的测量。

1997—2009年我国9省区18～49岁成年居民身体活动状况及变化趋势研究

目的研究1997—2009年我国9省区18~49岁成年居民身体活动状况及变化趋势。方法利用＂中国健康与营养调查＂资料中选取1997、2000、2004、2006和2009年5轮调查有完整身体活动数据的18~49岁健康成年居民25 507人作为研究对象,计算该人群每周身体活动量。结果男、女性成年居民身体活动量从1997年的358.7 metabolic equivalent-hours（MET-hrs）/周和403.1 MET-hrs/周分别下降至2009年的255.8 METhrs/周和249.0 MET-hrs/周;城市、农村成年居民身体活动量从1997年的311.1 MET-hrs/周和416.9 MET-hrs/周分别下降至2009年的181.4 MET-hrs/周和285.3 MET-hrs/周,男性、女性、城市、农村成年居民身体活动量在不同调查年间比较差异均有统计学意义（P〈0.01）。成年居民以静态活动为主要休闲方式的人群比例从1997年的89.0%升高至2009年的91.2%;以步行和骑自行车为主要出行方式的人群比例从1997年的70.0%下降至2009年的47.1%,成年居民休闲方式及出行方式的人群比例在不同调查年间比较差异均有统计学意义（P〈0.01）。结论我国9省区18~49岁成年居民身体活动量发生显著变化,该人群身体活动量的大幅度下降值得关注。

体力活动划分:不同类型体力活动的代谢当量及体力活动的分级

体力活动是一个非常复杂的过程 ,受多种因素包括运动时间、强度、频率等的影响。日常生活的多样性使得传统的体力活动划分的原则受到挑战。《体力活动概要》是一套完整的体力活动编码系统 ,按活动目的、类型和强度对体力活动进行了划分 ,是对日常体力活动分级研究的一个重要的工具。本文介绍了国内外有关体力活动的划分原则及新近推出的体力活动概要编码系统。

女性体力活动水平和骨矿物质含量及骨代谢关系的研究

目的 :探讨成年女性体力活动水平与骨矿含量和反映骨代谢有关生化指标的关系。方法 :以江门市 2 2 0位健康成年女性作为研究对象 ,采用MOSPA体力活动问卷评价其体力活动水平 ,并测量骨矿含量以及血清钙、磷、碱性磷酸酶、酸性磷酸酶、非前列腺酸性磷酸酶及尿钙和尿肌酐比值等反映骨代谢的生化指标的水平。结果 :校正有关混杂因素后 ,与低体力活动组相比 ,高体力活动组女性骨矿含量和骨皮质系数增加 ,血清碱性磷酸酶含量增加 ,酸性磷酸酶和非前列腺酸性磷酸酶含量下降。结论 :与低体力活动组比较 ,高体力活动组女性骨矿含量增加 ,骨形成较活跃 ,而骨吸收减少。

体力活动水平预测代谢综合征相关风险因素的有效性研究

目的：探讨体力活动水平预测代谢综合征（MS）相关风险因素的有效性。方法：对246名40～49岁健康中年男性进行问卷调查和相关生理生化指标测试．观察体力活动量和强度两个因素对MS相关风险因素的影响。根据国际体力活动调查问卷（IPAQ）的标准将体力活动量划分为低、中、高3种等级；体力活动强度划分为低、中、大强度3种等级：MS依据中国成人血脂异常防治指南的标准界定。结果：（1）随着体力活动量等级的提高，MS的发病率和相关风险指标均未呈逐级下降趋势。体力活动量各等级之间的相关风险因素无显著性差异（P〉0．05）；（2）随着体力活动强度等级的提高，MS发病率和相关风险指标呈显著性下降，其中中等强度等级组发病率和相关风险指标最低。结论：（1）体力活动量与MS相关风险因素之间无相关性，不能作为预测MS发病率和相关风险因素的评价指标：（2）中等强度以上的体力活动水平有利于MS发病率和相关风险因素指标的改善．体力活动强度可以作为评定MS相关风险因素的评价指标。