中学生课业负担过重的原因与对策

中学生课业负担过重 ,有其现实的社会物质根源和传统意识根源 ,有学校内部因素和社会环境因素的相互影响。减轻学生课业负担 ,需要加大教育投入 ,转变教育观念 ,创新评估机制 ,提高教师的职业道德素质和业务水平。     

Assessing Overweight,Obesity, Diet,and Physical Activity in College Students

Abstract

The authors surveyed 738 college students aged 18 to 27 years to assess overweight, obesity, dietary habits, and physical activity. They used BMI (body mass index) > 25 kg/m² or BMI > 85th percentile and BMI > 30 kg/m¹ or BMI > 95th percentile to estimate overweight and obesity in those aged < 19 years. To define overweight and obesity in those > 20 years, they used BMI > 25 kg/m² and > 30 kg/m². They found overweight rates of 21.6% using BMI directly and 16.2% using BMI percentile and obesity rates of 4.9% using BMI directly and 4.2% using BMI percentile. More than 69% of the participants reported < 5 servings of fruits and vegetables per day and more than 67% reported < 20 g of fiber per day; participants reported physical activity on fewer than 3 d/wk. Most college students are not meeting dietary and physical activity guidelines, suggesting the need for prevention interventions and increased understanding of overweight in college students.     

Low-intermediate dose testosterone replacement therapy by different pharmaceutical preparations improves frailty score in elderly hypogonadal hyperglycaemic patients

Abstract

An open-label follow-up study of low-to-intermediate dose testosterone replacement therapy (TRT) was conducted in 64 overweight patients (aged 65–75 years) with late onset hypogonadism (LOH) and increased fasting plasma glucose (FPG). Patients were subdivided into four treatment groups: oral testosterone (T) (T undecanoate, 80?mg/d), transmucosal T (60?mg/d), transdermal T (30?mg/d) or no treatment (control), and evaluated at 0 and 6 months. FPG, hemoglobin (Hb), prostate-specific antigen (PSA) and total T were measured and the Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) index was calculated. Body mass index (BMI), waist circumference, fitness level (6-min walking test), Aging Males’ Symptoms (AMS) scale, handgrip strength and energy expenditure with physical activity (Minnesota questionnaire for Leisure Time Physical Activity (LTPA)) were evaluated and a “frailty score” (based on: grip strength, gait speed and LTPA) was calculated. T levels increased in all treatment groups; the oral T group had values still in the hypogonadal range (5.9?±?1.1?nmol/L). PSA and Hb concentrations did not change in any group. BMI, waist circumference, FPG and HOMA-IR improved in all T-treated groups after 6 months, with a greater effect seen with transmucosal and transdermal T compared with oral T. This study indicates that low-to-intermediate dose TRT may be safely utilized in LOH patients to ameliorate somatic and psychological frailty symptoms in association with improved anthropometric and glycometabolic parameters in aging, overweight men with LOH and impaired fasting glucose.     

高校硕士研究生体质指数与体质指标的相关研究

运用文献资料法、身体测量法、频数分析等方法对中北大学、山西大学2002级~2004级在读硕士研究生的体质指数(Body Mass Index,BMI)和研究生身体机能、身体素质指标进行分析研究。结果显示:研究生BMI分布呈现"细峰右尾"型,10%~75%位点之间数值大致分布在18.5≤BMI<23的标准范围,但"右边粗大的尾部"说明研究生中存在着相当数量的超重或肥胖的人数;BMI与收缩压/舒张压、握力呈显著性正相关,与肺活量指数、纵跳、男生的俯卧撑、女生仰卧起坐、男生坐位体前屈存在着显著性负相关。结论:BMI水平与身体机能、身体素质密切相关。BMI偏低或偏高均会对身体机能、素质产生不同程度的消极影响。     

Physiological Daily Inhalation Rates for Health Risk Assessment in Overweight/Obese Children,Adults, and Elderly

Physiological daily inhalation rates reported in our previous study for normal‐weight subjects 2.6–96 years old were compared to inhalation data determined in free‐living overweight/obese individuals (n = 661) aged 5–96 years. Inhalation rates were also calculated in normal‐weight (n = 408), overweight (n = 225), and obese classes 1, 2, and 3 adults (n = 134) aged 20–96 years. These inhalation values were based on published indirect calorimetry measurements (n = 1,069) and disappearance rates of oral doses of water isotopes (i.e., ²H₂O and H₂¹⁸O) monitored by gas isotope ratio mass spectrometry usually in urine samples for an aggregate period of over 16,000 days. Ventilatory equivalents for overweight/obese subjects at rest and during their aggregate daytime activities (28.99 ± 6.03 L to 34.82 ± 8.22 L of air inhaled/L of oxygen consumed; mean ±  SD) were determined and used for calculations of inhalation rates. The interindividual variability factor calculated as the ratio of the highest 99th percentile to the lowest 1st percentile of daily inhalation rates is higher for absolute data expressed in m³/day (26.7) compared to those of data in m³/kg‐day (12.2) and m³/m²‐day (5.9). Higher absolute rates generally found in overweight/obese individuals compared to their normal‐weight counterparts suggest higher intakes of air pollutants (in μg/day) for the former compared to the latter during identical exposure concentrations and conditions. Highest absolute mean (24.57 m³/day) and 99th percentile (55.55 m³/day) values were found in obese class 2 adults. They inhale on average 8.21 m³ more air per day than normal‐weight adults.     

An integrative review of interventions for limiting gestational weight gain in pregnant women who are overweight or obese

ProblemExcessive gestational weight gain in women who are overweight or obese puts them at risk of poor short- and long-term outcomes for maternal and neonatal health. Several interventions have been trialled to encourage women who are overweight or obese to limit gestational weight gain during pregnancy.AimThe aim of this review was to analyse the evidence on interventions to limit gestational weight gain in pregnant women who are overweight or obese.MethodAn integrative review guided by the Joanna Briggs Institute approach was conducted. An unlabeled search query of pregnancy, weight, and obesity was conducted in Medline, Scopus and CINAHL, limited to English language, 2010–2020 publications, and primary research on humans. Unlabeled search query of “((pregnancy outcome) OR (prenatal care) OR (pregnancy complications)) AND ((weight loss) OR (weight gain) OR (weight management)) AND (obesity) was used. Additional 9 records were identified through reference lists. Following a critical appraisal, 21 primary research articles were included in this review. A thematic synthesis was undertaken.FindingsFour major themes were identified. These are (1) mixed findings of lifestyle interventions for weight management, (2) ineffectiveness of probiotics or metformin for weight management, (3) psycho-behavioural interventions for weight management, and (4) midwifery role as an integral component in multidisciplinary intervention for weight management.ConclusionThe literature suggests a need for longer duration of behavioural lifestyle intervention sessions led by the same midwife trained in motivational interviewing to limit weight gain in pregnant women who are overweight or obese.     

Does Metabolic Syndrome Impair Sexual Functioning in Adults With Overweight and Obesity?

Objectives: Obesity is a growing public health concern worldwide, and results in increased risk of cardiovascular disease, type 2 diabetes, metabolic syndrome, insulin resistance, dyslipidemia, hypertension, and reduced sex hormone production. Previous research suggests that obesity may contribute to sexual dysfunction. This review aims to determine the relationship between obesity and sexual dysfunction, and ascertain the associated cardiometabolic conditions that may contribute to impaired sexual functioning in individuals with obesity. Methods: Literature searches were conducted through PubMed and Embase from 1980 to 2016, to identify original research articles, reviews including systematic reviews and meta-analyses, using the search terms: obese, obesity, overweight, sexual function, sexual dysfunction, metabolic syndrome, CVD, T2D, hormones and weight loss. Results: This review found that individuals with obesity and cardiometabolic comorbidities were more likely to report the greatest degree or sexual dysfunction and/or reduction in sexual quality of life, compared to those without. Conclusions: Current evidence supports an association between sexual dysfunction and factors associated with obesity, such as reduced insulin sensitivity, dyslipidaemia, hypertension, and low oestrogen or testosterone. To establish efficacious treatments, research examining the impact of weight loss on the conditions associated with obesity, such as hypertension, reduced insulin sensitivity, dyslipidaemia, and low sex hormones and sexual functioning in individuals with overweight and obesity should be a priority.     

A Longitudinal Examination of Family Processes,Demographic Variables,and Adolescent Weight

Nationally representative studies estimate that almost one in five adolescents in the United States is overweight. This is a major concern for individuals' physical and psychological health and the overall economy in terms of health care costs and loss of productivity. A 12- to 14-year-old subsample of 4,688 adolescents from the NLSY97 cohort was used to address the association between family processes, demographic variables, and adolescent body mass index (BMI) percentile over 4 years. The final model indicated that frequency of family meals, gender, race, control, and mothers' BMI were important predictors of adolescent BMI percentile over time. Mothers' BMI was the strongest predictor of adolescent BMI percentile. More frequent family meals led to decreases in BMI percentile over time, whereas males, African Americans, and Latinos had higher average BMI percentiles than other groups.     

Sleep Quality and Body Mass Index in College Students: The Role of Sleep Disturbances

Abstract

Objective: Obesity and its comorbidities have emerged as a leading public health concern. The aim of this study was to explore the relationship between body mass index (BMI) and sleep patterns, including duration and disturbances. Methods: A convenience sample of 515 college students completed an online survey consisting of the Pittsburgh Sleep Quality Index (PSQI), and self-reported height and weight to calculate BMI. Univariate and multivariate logistic regression analyses were performed using components of the PSQI as predictors of overweight (BMI ≥ 25). Results: One-third of the participants had BMI ≥ 25, and 51% were poor-quality sleepers (PSQI > 5). Controlling for age and sex, only sleep disturbances were associated with overweight (odds ratio = 1.66, 95% confidence interval [1.08, 2.57]). Conclusions: Sleep disturbances, rather than sleep duration, predicted overweight among young adults; this is consistent with the most recent evidence in the literature. These findings support expanding the scope of wellness programs to promote healthy sleep among students.     

Exploring the Climate for Overweight and Obese Students in a Student Health Setting

Attitudes and beliefs of health care providers, in conjunction with a nonthreatening physical environment, are important components in establishing a constructive and supportive climate for care of overweight and obese students. Objective: The authors explored providers' attitudes about obesity and assessed the physical environment in a student health clinic to identify areas that may be detrimental to the care of overweight and obese students. Participants: Eighteen direct care providers participated in the project. Methods: The authors conducted focus groups with direct care providers and assessed their experiences and perceived challenges in working with overweight and obese students. The authors also conducted a walk-through assessment of the physical environment. Results: Direct care providers expressed discomfort in deciding how and when to discuss weight with students. The authors found that elements of the physical environment could present barriers to care for overweight and obese students. Conclusions: The authors make recommendations for improving the health care climate for overweight and obese students.