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1.
目的:对骨龄在6~12岁的儿童分别使用双能X线吸收法(DEXA)和生物电阻抗法(BIA)对身体成分进行测试,分析儿童身体成分指标的特征与变化规律,研究两种方法的相互关系,以DEXA为标准检验BIA与DEXA的相关性和一致性.方法:选取235名骨龄从6 ~12岁健康儿童(男童,n=127;女童,n=108),分别测试和计算身高、体重、身体体重指数和骨龄,分别使用DEXA和BIA(有16名男童和11名女童未完成BIA测试)测量儿童%BF.结果:DEXA所测儿童上肢、大腿、躯干和全身%BF均随骨龄增加而持续增加,在相同骨龄段儿童大腿部分%BF都要高于上肢和躯干部分% BF.在剔除性别和骨龄变量的影响条件下,儿童全身%BFDEXA与%BFBIA二变量的偏相关系数为0.906(P<0.01).所有儿童全身%BFDEXA与%BFBIA之间的线性回归分析,回归方程为DEXA% BF=1.040BIA% BF+0.119,判定系数R2=0.846,回归估计的标准误差SEE=3.779kg.结论:随着生长发育的进行儿童身体局部和全身% BF具有逐渐升高的趋势.BIA与DEXA在测量儿童全身体脂率时具有很高的相关性,BIA可以作为一种评价全身体脂率的方法.  相似文献   

2.
通过对1849岁成年人生物电阻抗法(BCAⅠ)与双能X线吸收测定法(DEXA)的身体成分测定结果进行比对研究,为BCAⅠ体成仪的实践应用提供参考依据。方法采用BCAⅠ与DEXA两法分析了132名成年人的身体成分,其中,男65名,女67名,年龄为(30.20±8.94)岁,BMI为(22.47±4.00)kg/m2,获取瘦体重(LBM)、肌肉重(SMM)、骨矿含量(BMC)、脂肪量(FM)、脂肪率(FM%)、躯干脂肪量(TFM)等,应用Bland-Altman一致图谱法与简单线性回归法比对了两测量结果间的一致性。结果 LBM、SMM、BMC、FM、FM%、TFM等指标两测量结果间具有较高的相关性(0.71249岁成年人生物电阻抗法(BCAⅠ)与双能X线吸收测定法(DEXA)的身体成分测定结果进行比对研究,为BCAⅠ体成仪的实践应用提供参考依据。方法采用BCAⅠ与DEXA两法分析了132名成年人的身体成分,其中,男65名,女67名,年龄为(30.20±8.94)岁,BMI为(22.47±4.00)kg/m2,获取瘦体重(LBM)、肌肉重(SMM)、骨矿含量(BMC)、脂肪量(FM)、脂肪率(FM%)、躯干脂肪量(TFM)等,应用Bland-Altman一致图谱法与简单线性回归法比对了两测量结果间的一致性。结果 LBM、SMM、BMC、FM、FM%、TFM等指标两测量结果间具有较高的相关性(0.7120.953,P<0.01),男女LBM、SMM、BMC参数BCAⅠ的测量结果高于DEXA(P<0.01),但FM、FM%、TFM参数BCAⅠ的测量结果低于DEXA(P<0.01)。与DEXA法相比,BCAⅠ法趋向于低估肥胖成年人与高估消瘦成年人的FM、TFM与FM%。结论采用BCAⅠ体成仪分析180.953,P<0.01),男女LBM、SMM、BMC参数BCAⅠ的测量结果高于DEXA(P<0.01),但FM、FM%、TFM参数BCAⅠ的测量结果低于DEXA(P<0.01)。与DEXA法相比,BCAⅠ法趋向于低估肥胖成年人与高估消瘦成年人的FM、TFM与FM%。结论采用BCAⅠ体成仪分析1849岁成年人的体成分时,与体脂正常者相比,肥胖与消瘦成年人体成分测量结果的准确性降低。  相似文献   

3.
目的:通过对18~56岁成年人使用生物电阻抗法(BCA I、BCA II)与双能X线吸收测定法(DEXA)测量全身瘦体重(LM)与四肢瘦体重(ALM),明确不同身体成分测量仪测量国人瘦体重分布特征时的差异,详述一致性界限与生存分析法在评价两种或多种方法测量结果间的一致性应用过程。方法:采用BCA I、BCA II与DEXA 3种设备测量163名成年人的身体成分,采用一致性界限与生存分析法评价3种设备测量LM与ALM结果的一致性。结果:男女受试者LM、ALM测量结果在3种测试方法中均具有较高的相关性(P<0.01),BCA I测量结果显著高于BCA II和DEXA,且都具有统计学意义(P<0.05),BCA II与DEXA的一致性程度较好。结论:生存分析与一致性图谱法可用于两种或多种方法测量结果间的一致性评价,两者可结合使用。相对于BCA I,BCA II与DEXA测量值一致性程度更好。  相似文献   

4.
两种方法评价武术运动员身体成分的比较研究   总被引:5,自引:0,他引:5  
通过人工测量法 (使用皮脂厚度计和皮尺 )和生物电阻抗法 (BioelectricalImpedanceAssessment,BIA) ,对北京体育大学的 71名国家武术运动员的体脂百分比和腰臀围之比进行了测量与评估。结果表明 :对男武术运动员 ,两种方法测量和评价结果非常一致 ,具有很高的相关性和可信度 ;但对女武术运动员 ,BIA方法比人工测量法结果普遍偏高 ,二者存在显著性差异  相似文献   

5.
运用体质指数法、皮褶厚度法及生物电阻抗法,判断上海城区儿童青少年超重、肥胖发生率及其一致性。结果显示:3种方法在判断不同年龄、性别儿童青少年超重、肥胖上一致性较低;测量原理与精确性不同,青少年儿童体成分化学组成不成熟及诊断、筛查标准的差异可能是3种方法一致性较低的原因。提出应建立适合我国儿童青少年"多维模型"假设下的体脂率预测方程。  相似文献   

6.
通过对辽宁省成年人体育锻炼的方式与体脂率的比较与研究,找出体脂率与体育锻炼的关系。  相似文献   

7.
基于医学指标检查结果的体脂率评价肥胖标准的方法研究   总被引:1,自引:0,他引:1  
研究试图以临床医学指标异常率为参照依据,探讨与健康密切相关的体脂率评价肥胖标准的方法。研究方法采用文献资料法、人体测量法、实验法、数理统计法等方法,对西安市108名自愿女性受试者进行身高、体重、皮褶厚度(肩胛部、臂部)、医学指标(SBP、DBP、TC、TG、HDLI、NS)等测试。所选医学指标均按临床医学标准判断。研究结果医学指标与体脂率均存在较高的相关关系;医学指标异常组体脂率均大于正常组;医学指标两项或两项以上异常的异常组与两项以下异常的正常组之间,体脂率均值差异非常显著;参照医学指标异常率,寻找出引起医学指标异常的体脂率临界点,即轻度肥胖评价标准和肥胖评价标准。主要结论引起医学指标两项或两项以上异常的主要原因是体脂率增加;随体脂率增加,医学指标异常率也不断增加;对肥胖评价标准的检验表明随肥胖程度增加临床医学诊断指标异常率同步提高。因此,可以尝试参照医学指标异常率,建立评价肥胖标准。  相似文献   

8.
体脂含量与体脂率测量与评价方法的比较   总被引:1,自引:0,他引:1  
体脂率指人体脂肪含量所占人体重量的百分数,是用于评价人体肥胖程度的一个最重要的指标,其高低与人体健康程度密切相关.随着人类社会的进步,科学技术的发展,人们的生活条件逐步改善,肥胖的人数在逐年增加.同时,研究体脂率的手段越来越多,评价方法也层出不穷:测量方法由简单的身体形态法发展到了较为精确的DEXA、空气置换法等,但由于这些方法都没有统一的标准,因此不同的测量方法都有着自己的一套评价体系.不同测量手段之间究竟有什么样的不同,以及在不同的条件下应该使用何种仪器对人体进行脂肪含量的测量,已经成为各国学者普遍关注的问题.  相似文献   

9.
对评价大学生身体成分方法的研究   总被引:2,自引:0,他引:2  
为研究在校大学生身体成分测量的最佳方法,采用皮褶法、生物电阻抗法(BAI)、身体质量指数(BMI)、腰臀比(WHR)和身高标准体重法,分别对随机抽取的220名大学生进行身体成分测试,并进行相关分析。结果发现:1.BAI、皮褶法、BMI和WHR可用来测量和评价大学生的身体成分,但其准确性依次是BAI>皮褶法>BMI>WHR;2.《标准》中身高标准体重不能客观有效地评价身体成分,故建议选用体脂百分比。  相似文献   

10.
目的:研究在BODPOD体成分测量仪中,利用估计测量与直接测量两种方法测得的成年人身体成分结果是否存在显著性差异,探索估计测量方法的准确性;方法:利用BODPOD体成分测量仪测量35名爱试者的身体成分。分别采用估计测量和直接测量两种方法测得胸腔内气体体积,然后再分别计算出体脂率。比较估计测量和直接测量两种方法所得的体成分值的差异性与相关性;结果:两种方法所得的%BF值无显著性差异,而是存在高度相关性(r=0.954,P〈0.001)。结论:估计测量方法也是一种较为精确的测量体成分的方法。从长远采看,存在估计测量方法代替直接测量方法测量体成分的可能。  相似文献   

11.
DEXA在身体成分测量中的应用   总被引:3,自引:0,他引:3       下载免费PDF全文
作为骨量测量“金标准”的双能X线吸收测定法(DEXA),近几年已被国外研究学者作为身体成分测量的新标准.但在国内DEXA还没有得到广泛应用.本文综合有关文献,从DEXA测量身体成分的原理、研究进展及展望等方面对DEXA进行综述,以期促进DEXA在国内更广泛的应用。  相似文献   

12.
The aims of this study were to determine the validity of fat mass of the trunk as a predictor for visceral fat area at the umbilicus level and to develop equations to predict visceral fat mass at the umbilicus level using fat mass of the trunk measured by dual-energy X-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA). The participants were 121 normal Japanese adults (69 males, 52 females). Another 60 volunteer adults (34 males, 26 females) were recruited for examination of cross-validity. Altogether, 41 adults (15 males, 26 females) in the original group and 19 adults (7 males, 12 females) in the cross-validity group received BIA measurement. We measured fat mass by DXA and the BIA system, which was a single-frequency BIA with 8-point contact electrodes, and visceral fat area by computed tomography. We observed significant correlations for visceral fat area in waist circumference (0.56) and fat mass of the trunk measured by DXA (0.64). There was no significant difference in fat mass of the trunk between the DXA and BIA systems, but the BIA system tended to provide an underestimate compared with DXA. With combined fat mass of the trunk measured by DXA and waist circumference as predictors, visceral fat area was estimated by equation (1) (R = 0.87, R(2) = 0.76, standard error of the estimate = 20.9 cm(2)). When substituting fat mass of the trunk measured by BIA into equation (1), there was no significant difference in visceral fat area between the reference and predicted values. An equation using fat mass of the trunk measured by BIA (equation 2) was obtained (R = 0.89, R(2) = 0.78, standard error of the estimate = 20.7 cm(2)), but a systematic error was found for the males. There was cross-validity in both equations. In conclusion, fat mass of the trunk is an effective predictor for the visceral fat area at the umbilicus level. Fat mass of the trunk measured by BIA might be a valid method to predict visceral fat, although further studies with larger samples taking into account the extent and type of obesity are required.  相似文献   

13.
对生物电阻抗法测定身体成分的评价   总被引:1,自引:0,他引:1  
采用生物电阻抗法测定身体成分的基本原理,对其主要的测试指标进行了分析评价。认为生物阻抗法简便、准确,可灵敏反应成人减肥效果和运动员的体重控制。同时,可以准确测定儿童的身体成分,为纵向研究提供可靠的数据。  相似文献   

14.
15.
Abstract

The aims of this study were to determine the validity of fat mass of the trunk as a predictor for visceral fat area at the umbilicus level and to develop equations to predict visceral fat mass at the umbilicus level using fat mass of the trunk measured by dual-energy X-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA). The participants were 121 normal Japanese adults (69 males, 52 females). Another 60 volunteer adults (34 males, 26 females) were recruited for examination of cross-validity. Altogether, 41 adults (15 males, 26 females) in the original group and 19 adults (7 males, 12 females) in the cross-validity group received BIA measurement. We measured fat mass by DXA and the BIA system, which was a single-frequency BIA with 8-point contact electrodes, and visceral fat area by computed tomography. We observed significant correlations for visceral fat area in waist circumference (0.56) and fat mass of the trunk measured by DXA (0.64). There was no significant difference in fat mass of the trunk between the DXA and BIA systems, but the BIA system tended to provide an underestimate compared with DXA. With combined fat mass of the trunk measured by DXA and waist circumference as predictors, visceral fat area was estimated by equation (1) (R = 0.87, R 2 = 0.76, standard error of the estimate = 20.9 cm2). When substituting fat mass of the trunk measured by BIA into equation (1), there was no significant difference in visceral fat area between the reference and predicted values. An equation using fat mass of the trunk measured by BIA (equation 2) was obtained (R = 0.89, R 2 = 0.78, standard error of the estimate = 20.7 cm2), but a systematic error was found for the males. There was cross-validity in both equations. In conclusion, fat mass of the trunk is an effective predictor for the visceral fat area at the umbilicus level. Fat mass of the trunk measured by BIA might be a valid method to predict visceral fat, although further studies with larger samples taking into account the extent and type of obesity are required.  相似文献   

16.
用DEXA 技术测量体成分及可行性研究   总被引:1,自引:0,他引:1  
采用DEXA技术测量人体成分,并对测量的瘦体重,脂肪含量与骨矿物质含量进行了相关分析,结果显示,受试者全身骨矿物质含量与全身瘦体重,脂肪含量,体重均呈中度正相关关系,双臂骨矿物质含量与双臂瘦体重,脂肪含量呈高度正相关关系,双腿骨矿物质含量与双腿瘦体重呈高度正相关关系,与双腿脂肪含量呈中度相关关系,躯干骨矿物质含量与躯干瘦体重呈中度正相关关系,与躯干脂肪含量呈低度正相关关系,全身及各个部位的骨矿物质含量与相应部位的体成分的相关分析表明,用DEXA技术进行身体成分的研究是有可行的。  相似文献   

17.
The main aim of this study was to determine the test-retest reliability of existing tests of health-related fitness. Participants (mean age 14.8 years, s?=?0.4) were 42 boys and 26 girls who completed the study assessments on two occasions separated by one week. The following tests were conducted: bioelectrical impedance analysis (BIA) to calculate percent body fat, leg dynamometer, 90° push-up, 7-stage sit-up, and wall squat tests. Intra-class correlation (ICC), paired samples t-tests, and typical error expressed as a coefficient of variation were calculated. The mean percent body fat intra-class correlation coefficient was similar for boys (ICC?=?0.95) and girls (ICC?=?0.93), but the mean coefficient of variation was considerably higher for boys than girls (22.2% vs. 12.2%). The boys' coefficients of variation for the tests of muscular fitness ranged from 9.0% for the leg dynamometer test to 26.5% for the timed wall squat test. The girls' coefficients of variation ranged from 17.1% for the sit-up test to 21.4% for the push-up test. Although the BIA machine produced reliable estimates of percent body fat, the tests of muscular fitness resulted in high systematic error, suggesting that these measures may require an extensive familiarization phase before the results can be considered reliable.  相似文献   

18.
About two thirds of adults in Germany are overweight or obese. While an increase in the consumption of high-calorie food is considered the main cause, the influence of various forms of sedentary activities is still controversially discussed. The aim of the present study is to compare the body composition of hobby gamers with reference data collected throughout Germany and to examine the effects of intensive use of computer games (gaming) on body composition. A total of 68 male participants of a computer game event aged 18–46 years (27.9 years; 180.1?cm; 83.5?kg; BMI 25.7) were examined for fat mass, body cell mass, extracellular mass, body water and phase angle using bioelectrical impedance analysis (BIA, Nutriguard MS type, data input). Ten test persons were retested by means of segmental 8?electrode BIA after a 24?h interval during their visit to the event. As a reference sample, data from 278 male adults of the same age (27.9 years, 179.4?cm; 78.8?kg; BMI 24.5) were collected in 168 locations throughout Germany. The hobby gamers reported on average 37.1?h screen media usage per week. Compared to the reference sample, they showed a slightly higher body cell mass index (p?<?0.01, T?=?4.07), but no differences in fat mass index (p?=?0.96, T?=?0.05) and phase angle (p?=?0.90, T?=?0.12). A significant increase in body water (T0: 48.2?l, T0+24?h: 49.3?l; p?=?0.04, T?=?2.39) and decrease in the phase angle of the lower extremities (T0:?7.40, T0+24?h: ?6.85; p?<?0.01, T?=?5.40) was observed in the 24?h retest. Compared to the reference data collected throughout Germany, hobby gamers show no differences in health-relevant parameters of body composition. Nevertheless, after intensive gaming, a short-term increase in the amount of extracellular water in the lower extremities was found. Due to these disturbances in the water balance, the consequent execution of movement breaks during gaming is important.  相似文献   

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