High Body Mass Index is not a barrier to physical activity: Analysis of international rugby players’ anthropometric data

Abstract

Recent data indicate that levels of overweight and obesity are increasing at an alarming rate throughout the world. At a population level (and commonly to assess individual health risk), the prevalence of overweight and obesity is calculated using cut-offs of the Body Mass Index (BMI) derived from height and weight. Similarly, the BMI is also used to classify individuals and to provide a notional indication of potential health risk.

It is likely that epidemiologic surveys that are reliant on BMI as a measure of adiposity will overestimate the number of individuals in the overweight (and slightly obese) categories. This tendency to misclassify individuals may be more pronounced in athletic populations or groups in which the proportion of more active individuals is higher. This differential is most pronounced in sports where it is advantageous to have a high BMI (but not necessarily high fatness). To illustrate this point we calculated the BMIs of international professional rugby players from the four teams involved in the semi-finals of the 2003 Rugby Union World Cup. According to the World Health Organisation (WHO) cut-offs for BMI, approximately 65% of the players were classified as overweight and approximately 25% as obese.

These findings demonstrate that a high BMI is commonplace (and a potentially desirable attribute for sport performance) in professional rugby players. An unanswered question is what proportion of the wider population, classified as overweight (or obese) according to the BMI, is misclassified according to both fatness and health risk? It is evident that being overweight should not be an obstacle to a physically active lifestyle. Similarly, a reliance on BMI alone may misclassify a number of individuals who might otherwise have been automatically considered fat and/or unfit.     

Does current behaviour predict the course of children's physical fitness?

Abstract

The secular trend of reduced physical fitness (PF) leads to increased health risks. The aim of the present paper is to analyse various current factors that affect health behaviour with respect to the course of PF over 2 years. A path analysis combined with a latent growth curve analysis was based on a study that was conducted between June 2008 and June 2010 with 145 primary German school children (52.1% male, average age at baseline 7.95 years ± 0.95). PF was tested with the German Motor Test 6–18. For the mean PF and the course of PF, direct and indirect influences were shown over three levels, including migration background on the first level and physical activity (PA) on the second level. Body mass index (BMI) impacted the mean PF but not the course of PF. The influence of sedentary behaviour on the mean PF was diminished (compared to bivariate analysis) due to its common variance mainly with BMI. PA affected not only current PF in children but also the course of PF (a_intercept = .28, P = .001; a_slope = .27, P = .21). Consequently, preventive measures should focus on early adoption and maintenance of PA.     

BMI、WHR与膝关节慢性创伤发病风险的关系研究

研究对象为哈尔滨市第六医院康复科402例膝关节慢性创伤患者（2005年～2010年）,数据采集内容包括：年龄、性别、膝关节慢性创伤、体质指数、腰臀比。根据性别不同对数据进行数理统计分析,通过体质指数（BMI）和腰臀比（WHR）标准对患者的肥胖程度进行分析。根据数据结果显示男子通过腰臀比定义为肥胖的往往高于女士。腰臀比在评价受试者肥胖的比例明显高于BMI测定结果（P〈0．05）,尤以男性突出。在膝关节慢性创伤患者中,腰臀比（WHR）与男性、女性膝关节骨关节慢性创伤的患病率存在显著性相关,男性患者达到了非常显著行相关,而体质指数（BMI）没有达到显著性相关。     

体育与非体育专业女大学生瘦身倾向及行为的调查

采用问卷调查法,对体育与非体育专业的女大学生自我体重的评价、期望及认知偏差和瘦身的动机、方法等实际情况进行比较。调查发现,两组女大学生在自我体重认知及瘦身倾向上并无差异,但在瘦身的期望值上,非体育专业比体育专业女大学生怀有更不切实际的想法。     

EONPS减肥工程对单纯性超重与肥胖女学生形态、机能及生化实验的研究

探讨健康有效的减肥工程促进模式和对单纯性超重与肥胖女学生身体形态、机能及生化指标与肥胖程度的关系,为早期预防提供了理论依据。研究对象分为实验组和对照组,采用目前我国通用的肥胖标准和腰围新标准,进行为期一年的干预实验。结果显示,实验组各项指标与实验前及对照组比较均具有显著性差异P<0.05,BMI的变化与机能和生化指标明显相关。结论:通过减肥工程的干预,单纯性超重与肥胖女学生的血压、血脂水平得到了调节,并且改变了各项指标相互间的动态平衡,为我国单纯性超重与肥胖青少年健康减肥提供了新的理论与方法。     

普通高校大学生体质测试总分与指标间的相关性研究--以武汉工程大学为例

本文以提取的武汉工程大学本科生体质健康测试数据为样本,通过Excel、SPSS 22.0等工具,采用单因素方差分析法、相关性分析、多元回归分析法对测试数据进行分析研究。结果显示:男女体质测试指标和派生指标BMI均与体测总分之间存在高度相关性,其中坐位体前屈、引体向上/仰卧起坐、50m指标对体质测试总分影响较大;男女生BMI指标与坐位体前屈之间没有显著性相关关系;BMI与800m/1000m之间有很强的正线性关系。研究结果表明,通过锻炼身体,降低肥胖者的BMI值,有利于提升学生体质状态,提高测试成绩。     

拉丁舞对大学生BMI与体脂肪率的多维影响

目前拉丁舞受到越来越多高校大学生的喜爱。本文通过对高校70名拉丁舞爱好者进行测试,分析比较拉丁舞运动者BMI指标与体脂肪率的变化情况,结果表明:拉丁舞这种有氧运动对体重指标的影响具有多重意义,可以起到减少脂肪,匀称体形的作用。由此可以看出此项运动对健康、健美的价值,希望大学生长期坚持锻炼,为终身体育打下良好基础。     

Neural decoding based on probabilistic neural network

Brain-machine interface (BMI) has been developed due to its possibility to cure severe body paralysis. This technology has been used to realize the direct control of prosthetic devices,such as robot arms,computer cursors,and paralyzed muscles. A variety of neural decoding algorithms have been designed to explore relationships between neural activities and movements of the limbs. In this paper,two novel neural decoding methods based on probabilistic neural network (PNN) in rats were introduced,the PNN decode...     

上海市国民体质监测中高血压检出人群的体质现状

本研究以2005年上海市国民体质监测中一次性血压测量下的高血压检出人群。且两周内采服用过降压药物者为研究对象,分析不同血压类型人群的体质特征,以掌握高血压对体质各方面造成的影响。结果表明：随着血压水平的增高,人群中的体质状况呈下降趋势;BMI和WHR越高,患高血压的风险越大,而WHR来预测高血压比用BMI的价值更高。     

根据BMI和体脂百分比标准判别成人肥胖度效力的评估性研究

用WHO推荐的BMI标准和日本体脂百分比标准,对5 020名18～22岁成年学生的肥胖度进行交互判别的结果显示,对体脂正常者与体重偏轻者的判别结果一致性程度较高,其差异不超过10%,但被F%标准判别为轻、中、重度肥胖者的比例大于用BMI标准判别为超重和肥胖者的比例.如按F%标准衡量,在男女BMI正常者中约10%～20%的人属于超重或肥胖者.BMI的第95%位数相当于BMI超重标准,F%的第85%位数相当于F%的男子轻度肥胖与女子中度肥胖标准.