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1.
目的:本研究评定运动强度相同,不同运动量下肢优势侧和非优势侧相同负重往返跑对青年学员平衡能力产生的影响。方法:10名健康男性受试者平均年龄(20.80±2.04)岁,身高(173.99±2.87)cm。采用随机交互设计,10名受试者分别完成4次单侧负重往返跑:优势侧20 m×5、非优势侧20 m×5、优势侧20 m×10和非优势侧20 m×10,分别在运动后即刻和运动后20 min进行平衡能力测试,并记录R-R间期。结果:与安静状态相比,运动后,HR、EPOC和TRIMP值均显著增加(P<0.01),优势侧和非优势20 m×10 EPOC和TRIMP值显著大于20 m×5(P<0.01)。与安静值相比,优势侧和非优势侧20 m×5和20 m×10运动后即刻,整体、前后和左右方向摆动均显著增加(P<0.05),20 m×10优势侧和非优势侧左右方向摆动程度均显著高于20 m×5(P<0.05),但优势侧和非优势侧之间不存在显著差异(P>0.05),表现出对称性的变化;此外,恢复期20 min内均迅速回落到安静值(P>0.05)。结论:运动后即刻平衡能力受到干扰;运动量增加,左右方向损害程度增加;优势侧和非优势侧平衡能力的变化相似,可能存在交互效应。  相似文献   

2.
健康人不同年龄段HRV频谱分析及进食,心算的影响   总被引:1,自引:0,他引:1  
应用上医大生理教研室研制的“心率变异性频谱分析仪”,以R-R间距总变异性(TV)、低频成分(LF)、高频成分(HF)以及LP/HF比值为指标,对健康人不同年龄段、午饭前后及安静与心算时的心率变异性(HRV)进行频谱分析,结果表明:健康女性60岁以上,男性50岁以上各年龄段TV较低龄段显著降低,女性30岁以上各年龄段及男性50-60岁LF、女性20岁以上及男性21-50岁各年龄段HF均较低龄段升高显著,女性21-30岁较1-10岁LF/HF降低显著;午饭后TV均较饭前显著降低,心算时LF显著升高,HF显著降低,≥40岁组心算时LF/HF显著升高。结果提示:健康人高龄段调控心脏的自主神经整合功能显著降低,健康人的交感、迷走神经活动在不同年龄段有着不同的变化;健康成人午饭后自主神经整合功能显著降低;心算时交感神经活动显著增强,迷走神经活动显著降低,≥40岁组心交感神经活动增强尤为显著。  相似文献   

3.
精神紧张、焦虑等脑活动可以导致心脏疾病,而冥想能够改善心脏功能.采用心率变异性、有向传递函数和校正条件熵的方法研究了不同脑任务引起心脏功能的变化以及皮层脑活动和心脏活动的耦合模式.结果表明,意识活动可以通过抑制交感神经减慢心率,通过抑制副交感神经和激活交感神经加快心率.并且意识活动调节自主神经过程中脑皮层中央后区到前区的信息流增加,心脑间的耦合程度显著增强.有向传递函数和校正条件熵方法有望成为分析脑电信号的功能耦合及脑到心脏信息传递的有力工具.  相似文献   

4.
目的:探讨2型糖尿病(T2DM)患者心率变异性(HRV)与心率减速力(DC)的相关性及其对自主神经功能的评估价值。方法:选取2018年1月~2019年12月期间合肥市第一人民医院收治的120例T2DM患者为研究对象,纳入实验组,其中单纯T2DM患者69例(单纯T2DM组),T2DM伴周围神经病变(DPN)患者51例(DPN组),另选同期在我院进行心功能检查的健康志愿者120例作为对照组。所有受试者均进行24h动态心电图检查,根据检查结果计算HRV值[总标准差(SDNN)、两个相邻RR间期互差(PNN50)、差值均方根(RMSSD)]和DC值,根据各组受试者的DC值,统计对比各组的猝死风险,并分析T2DM患者DC值与HRV各项指标的相关性。结果:对照组、单纯T2DM组、DPN组的SDNN、PNN50、RMSSD、DC值依次降低(均P0.05)。对照组、单纯T2DM组、DPN组各猝死风险等级分布整体比较差异有统计学意义(P0.05),单纯T2DM组、DPN组猝死高危比例显著高于对照组,且DPN组猝死高危比例高于单纯T2DM组(均P0.05)。经Pearson相关分析,T2DM患者的DC值与SDNN、PNN50、RMSSD呈明显的正相关(P0.05)。结论:T2DM患者的DC值、HRV指标均低于正常人群,合并DPN的T2DM患者猝死风险明显提高,DC值与HRV指标间存在明显的正相关,可作为T2DM患者自主神经功能状态评估的重要指标。  相似文献   

5.
目的 基于心率变异性(heart rate variability,HRV)分析评估运输应激对Beagle犬自主神经功能的影响,并界定其恢复期.方法 16只Beagle犬随机分成两组(每组8只),即对照组和运输应激组,利用大动物无创生理信号遥测技术,分别监测清醒自由活动状态下对照组和运输应激组应激4 h后、恢复1、2、...  相似文献   

6.
目的:探讨心率变异性(HRV)及β-羟丁酸(β-HB)水平与冠心病(CHD)合并心力衰竭(HF)患者经皮冠状动脉介入术(PCI)术后预后的关系。方法:选取2023年12月至2024年12月66例CHD合并HF患者进行分析,所有患者均行PCI治疗,术后依照患者3个月随访情况记录其MACE发生率,依照是否发生MACE将患者分为预后良好组(40例)与预后不良组(26例)。比较2组患者一般资料,HRV指标及β-HB水平,并建立logistics回归模型,分析预后影响因素,随后建立受试者工作特征(ROC)曲线,分析HRV、β-HB联合对CHD合并HF患者PCI术后预后预测价值。结果:66例患者中共30例发生MACE,发生率为45.45%,其中心源性死亡3例,再发心肌梗死8例,恶性心律失常19例;预后良好组与预后不良组性别、体质量指数(BMI)、起病到治疗时间、吸烟史、饮酒史、合并基础疾病、入院时心率、入院时MAP对比无明显差异(P>0.05),预后良好组与预后不良组年龄、Killip心功能分级对比差异显著(P<0.05);预后不良组正常窦性心搏间期标准差(SDNN)、低频功率(LF)、β-HB高于预后良好组,高频功率(HF)、全程相邻窦性心搏间期差值大于50 ms的心搏占总心搏间期数的百分比(pNN50)低于预后良好组(P<0.05);以预后情况作为因变量(预后良好=0,预后不良=1)纳入logistics回归模型,结果显示,SDNN、LF、β-HB为CHD合并HF患者PCI术后预后不良的独立影响因素(P<0.05);SDNN、LF、pNN50、HF、β-HB预测CHD合并HF患者PCI术后预后的截断值分别为>121.54 m、>53.54 ms2、<12.54%、<46.25 ms2、>107.46μmol/L,且HRV、β-HB联合对CHD合并HF患者PCI术后预后的预测灵敏度、特异度更高(P<0.05)。结论:HRV及β-HB与CHD合并HF患者PCI术后预后水平密切相关,可早期通过评价SDNN、LF、β-HB水平预测患者预后,且HRV联合β-HB预后预测灵敏度、特异度更高。  相似文献   

7.
不同年份山东省高身材和矮身材儿童少年筛检及体质评价   总被引:1,自引:0,他引:1  
利用1985年、1995年和2000年山东省学生体质与健康调研资料,按照中国汉族儿童少年身高的P97和P3百分位数,筛检高身材和矮身材儿童少年。分析了15年来高身材和矮身材儿童少年检出率的变化,对2000年高身材和矮身材儿童少年的体质状况进行了分析评价。高身材儿童少年检出率明显上升,高身材儿童少年在运动素质方面既有优势也有不足,并非意味着体质与健康状况有更高的优势;矮身材儿童少年体质较差,应采取措施促进其健康成长。  相似文献   

8.
目的:观察儿童使用不同剂量的多乐氟氟化钠护齿剂(Duraphat)对其尿氟浓度的影响,为Duraphat应用于群防群治提供理论依据。方法:采用氟离子选择电极法,将53名3~4岁儿童按班别分成三组,分别使用0.2 m L及0.05 m L Duraphat涂布儿童牙齿,检测涂氟前和涂氟后1、2、3 d的尿氟浓度,并进行组内和组间比较。结果:各组使用Duraphat后尿氟浓度逐渐增加,涂氟后2 h开始与涂氟前比较差异均有统计学意义(P0.05),涂氟后3~4 h尿氟浓度达到高峰,至21 h后与涂氟前比较差异无统计学意义(P0.05);3岁0.2 m L组与0.05 m L组在涂氟后2~4 h的尿氟浓度比较差异有显著性(P0.05),其他时间比较均无显著性差异(P0.05);0.05 m L3岁组与4岁组比较尿氟浓度无明显差别(P0.05);3岁初次用氟组和4岁多次用氟组涂氟前尿氟无显著差异(P0.05)。结论:儿童口腔局部用氟对其尿氟浓度有影响,随局部用氟剂量的增加而增加;年龄对儿童尿氟浓度无明显影响;Duraphat在体内无远期氟蓄积,在一定剂量内使用Duraphat可起到较好的防龋效果。  相似文献   

9.
目的:调查北京市学龄前儿童超重肥胖流行现状并分析其影响因素,为制定防制策略提供科学依据。方法:选择842例3~5岁健康查体的学龄前儿童为研究对象,测量身高、体重并计算体质量指数(BMI)。向儿童主要养护人进行问卷调查,获得母亲孕期、儿童早期喂养、身体活动和行为习惯、家庭情况和膳食情况等与儿童超重肥胖的相关信息。以儿童是否超重肥胖为因变量,影响儿童超重肥胖的23个因素为自变量,进行单因素和多因素Logistic 回归分析。结果:学龄前儿童超重率为10.69%、肥胖率为11.28%;多因素Logistic回归分析显示,孕期增重、出生6月内喂养方式、屏幕暴露时长、谷薯类食物食用频率4个变量差异有统计学意义(P<0.05),孕期增重过多、出生6月内人工喂养、每日屏幕暴露时长≥1 h、每周食用谷薯类食物是儿童超重肥胖的危险因素。结论:北京市学龄前儿童超重肥胖率处于较高水平,儿童超重肥胖受多种因素的共同影响。  相似文献   

10.
目的:探讨学龄前儿童超重和肥胖的现状及其影响因素。方法:从青岛市幼儿园招募年龄在3-6 岁儿童参与本调查,通过健康体格检查和问卷调查两部分进行。其中体格检查包括身高和体重的测量,问卷调查内容包括父母的相关变量以及儿童个人饮食行为等因素。其中1080 份为完整有效数据。结果:学龄前儿童超重和肥胖人数分别占总数的18.80%和8.98%。男孩的超重和肥胖率(31.8%)高于女生(23.8%)。父亲和母亲的超重和肥胖均与儿童超重和肥胖存在关联性(P<0.05)。较长屏幕时间、快速进食是超重和肥胖的危险因素(P<0.05),而增加体力活动时间为保护因素(P<0.05)。偏爱肉类也是与超重/ 肥胖相关的因素(P<0.05)。结论:孩子个性习惯和父母均与学龄前儿童超重和肥胖相关,学龄前儿童超重和肥胖问题仍然是一个重要的公共卫生问题。  相似文献   

11.
目的:研究血管紧张Ⅱ(AngⅡ)对家兔心率变异(HRV)影响的机制。方法:分别给家兔静脉输注生理盐水,AngⅡ,溴化六烃季胺(HEXB),HEXB+AngⅡ检测安静状态下连续5 min的心电图并进行HRV的时域和频域分析。结果:血管紧张素Ⅱ组的时域指标SDNN和RMSSD较对照组明显降低,频域指标低频(LF)升高,而高频(HF)和总功率(TP)明显降低;HEXB+AngⅡ组与HEXB组相比无明显区别。结论:交感神经阻断剂HEXB不能影响AngⅡ的作用,AngⅡ主要通过抑制中枢自主神经的传出,降低迷走神经张力来降低HRV。  相似文献   

12.
Caloric restriction (CR) retards aging in laboratory rodents. No information is available on the effects of long-term CR on physiologic markers of aging and longevity in humans. Heart rate variability (HRV) is a marker for cardiac autonomic functioning. The progressive decline in HRV with aging and the association of higher HRV with better health outcomes are well established. Heart rate variability assessment is a reliable tool by which the effects of CR on autonomic function can be assessed. Time- and frequency-domain analyses compared 24-h HRV in 22 CR individuals aged 35-82 years and 20 age-matched controls eating Western diets (WD). The CR group was significantly leaner than the WD group. Heart rate was significantly lower, and virtually, all HRV values were significantly higher in the CR group than in the WD group (P < 0.002). Heart rate variability in the CR individuals was comparable with published norms for healthy individuals 20 years younger. In addition, when differences in heart rate (HR) and HRV between CR and WD were compared with previously published changes in HRV induced in healthy adults given atenolol, percent differences in each measure were generally similar in direction and magnitude and suggested declines in sympathetic and increases in parasympathetic modulation of HR and increased circadian variability associated with CR. These findings provide evidence that CR has direct systemic effects that counter the expected age-associated changes in autonomic function so that HRV indexes in CR individuals are similar to those of individuals 20 years younger eating WDs.  相似文献   

13.
目的:研究糖尿病人植物神经病变与心率变异的关系。对象:正常对照组和根据临床有无糖尿病神经病变(DAN)分组的糖尿病病人,方法:应用24小时动态心电图对正常和糖尿病人进行心率变异的线性,非线性散点图和非线性定量参数分析,结果:单纯糖尿病组SDNN,SDANN和PNN50低于正常组(P〈0.05);糖尿病+DAN组各项线性时域分析指标均低于正常和单纯糖尿病组(P〈0.01-0.001),散点图分析结果  相似文献   

14.
The objective of this study was to establish differences in vagal reactivation, through heart rate recovery and heart rate variability post exercise, in Brazilian jiu-jitsu wrestlers (BJJW). A total of 18 male athletes were evaluated, ten highly trained (HT) and eight moderately trained (MT), who performed a maximum incremental test. At the end of the exercise, the R-R intervals were recorded during the first minute of recovery. We calculated heart rate recovery (HRR60s), and performed linear and non-linear (standard deviation of instantaneous beat-to-beat R-R interval variability – SD1) analysis of heart rate variability (HRV), using the tachogram of the first minute of recovery divided into four segments of 15 s each (0-15 s, 15-30 s, 30-45 s, 45-60 s). Between HT and MT individuals, there were statistically significant differences in HRR60s (p <0.05) and in the non linear analysis of HRV from SD130-45s (p <0.05) and SD145-60s (p <0.05). The results of this research suggest that heart rate kinetics during the first minute after exercise are related to training level and can be used as an index for autonomic cardiovascular control in BJJW.  相似文献   

15.
We assessed the sympatho-vagal activities of the heart after administration of capsaicin by measuring the power spectral analysis in rats. There were major two frequency components of heart rate variability, which we defined as high (1.0 Hz<, HF) and low (LF, <1.0 Hz) frequency components. Vagal blockade by atropine abolished the high frequency component, and lowered the amplitude of the low frequency component. On the other hand, under conditions of sympathetic blockade by propranolol, the low frequency component was reduced. Combined vagal and sympathetic blockade abolished all heart rate fluctuations. We analyzed the low and high frequency components by integrating the spectrum for the respective band width. The rats administered capsaicin had a higher heart rate and sympathetic nervous system index (LF/HF) than the control group of rats. These results suggest that power spectral analysis is an effective and noninvasive method for detecting subtle changes in autonomic activity in response to the intake of foods or drugs.  相似文献   

16.
    
Impairment in autonomic self-regulatory functioning reflected by reduced heart rate variability (HRV) is a common feature of alcohol use disorder (AUD) and is believed to heighten AUD relapse risk. However, to date, no study has explored associations between in natura HRV and subsequent alcohol use among individuals seeking AUD recovery. In this study, 42 adults in the first year of a current AUD recovery attempt were monitored for 4 days using ambulatory electrocardiogram, followed by 90 days of alcohol use monitoring using timeline follow-back. HRV indices (independent variables) reflecting autonomic neurocardiac engagement were calculated from electrocardiogram recordings. Alcohol use (dependent variable) was calculated from timeline follow-back and expressed as per cent days abstinent (PDA). The sample was 73.81% White/European American, 19.05% Black/African American, 4.76% Asian, and 2.38% Other race/Mixed race. As predicted, higher parasympathetically mediated HRV and lower heart rate were associated with greater PDA over 90-day follow-up. Additionally, interactions between these measures and baseline PDA indicated higher parasympathetically mediated HRV and lower heart rate mitigated the deleterious positive association between baseline and follow-up alcohol use. Including factors known to influence alcohol use and/or HRV in the models did not meaningfully alter their results. Findings are consistent with psychophysiological theories implicating autonomic self-regulatory functioning in AUD treatment outcomes and suggest that select HRV indices may have utility as indicants of risk for alcohol use lapse in individuals in early AUD recovery. Findings provide theoretical support for HRV Biofeedback for this population, which exercises the psychophysiological systems that support self-regulation.  相似文献   

17.
    
ABSTRACT

The autonomic nervous system (ANS) is one of the effector pathways for circadian variation of many physiological parameters. Autonomic tone and airways caliber have been reported to exhibit circadian variation in separate studies. A simultaneous investigation of heart rate variability (HRV) and airway caliber might ascertain how airway caliber is modulated by autonomic tone. This study was planned to identify the variations in airway caliber and autonomic function tone during a 24-hour span. A total of 56 healthy male subjects with almost similar daily routines were studied. Time domain, frequency domain and nonlinear analysis of R-R interval from 5 min electrocardiogram (ECG) was done seven times during the daytime wake span at 3-hour intervals starting at 05:00 h in the morning until 23:00 h in the night. Simultaneously peak expiratory flow rate (PEFR) was determined using a mini Wright’s peak flow meter. Rhythmometric analysis was done for PEFR and HRV parameters. Significant circadian variation in low frequency (LF) and high frequency (HF) variance was identified in this group of healthy subjects. The circadian rhythm of LF variance was characterized by a gradual increase and corresponding reciprocal change in HF variance from morning until night. The LF/HF ratio and SD2/SD1 ratio reflecting sympatho-vagal balance showed low to high values from morning to evening. The acrophase of the PEFR temporal pattern is similar to that of LF power and almost opposite in phase to that of HF power. PEFR is positively correlated with LF power. The circadian rhythm of airway caliber co-varies with cardiac autonomic tone. It appears that the temporal pattern of cardiac autonomic tone precedes in time that of airways caliber, thereby suggesting the latter operates under the modulatory effect of the 24-hour pattern in sympatho-vagal balance.  相似文献   

18.
不同年龄健康被试者心率变异性的谱分析研究   总被引:1,自引:0,他引:1  
对不同年龄健康男性被试者卧、立位条件下,心率变异性(heart rate variability,HRV)谱高、低频成分随年龄变化的规律进行研究。结果表明:虽然各年龄组间卧、立位时的静息平均心率并无显著差别,但HRV却随年龄的增长而明显降低,青年组HRV谱高、低频谱峰功率的显著高于中年组、中老年组及老年组(P〈0.05或P〈0.01);HRV谱低频谱功率、高频谱功率及总功率均随年龄增长呈指数衰减规  相似文献   

19.
目的:本研究评估不同负重量(0 kg、27.5 kg和50 kg)站立30 min对心脏自主神经功能的影响。方法:采用随机交互设计,24名健康男性受试者完成3次30 min静止站立,分别记录RR间期:包括安静状态5 min(卧位),静态站立30 min,站立后恢复期5 min(卧位),进行相应心率变异(HRV)分析。结果:与安静状态相比,站立中HR增加(P < 0.05),RMSSD降低(P < 0.05),负重量增加,SDNN、SDNN/HR和LF呈下降趋势,HF降低(P < 0.05),LF/HF增加(P < 0.05)。与负重0 kg和27.5 kg相比,负重50 kg E-POCPeak和TRIMP增加(P < 0.05)。恢复期,HR下降,但未能恢复至安静水平;RMSSD恢复至安静水平,SDNN增加(P < 0.05);负重50 kg,HR均高于负重0 kg和27.5 kg(P < 0.05)。结论:急性静力性30 min站立,心脏自主神经功能发生调整,随着负重量增加,整体HRV呈下降趋势,5 min恢复期,交感神经活性处在较高水平。不同负重状态下整体HRV变化相似。  相似文献   

20.
The aim of this study was to evaluate the effect of consumption of coffee polyphenols (CPPs) on the autonomic nervous system activity and decreased skin barrier function caused by sodium dodecyl sulfate (SDS) treatment. In this single-blind, placebo-controlled study, ten healthy male subjects consumed either a beverage containing CPPs or a placebo beverage for four weeks. CPPs significantly suppressed the deterioration in skin barrier function and skin moisture content induced by SDS treatment after the third week. Furthermore, in the heart rate variability analysis, CPPs significantly produced an increase in parasympathetic nervous activity, and a decrease in sympathetic nervous activity after the four weeks of beverage consumption. These results suggest that CPPs might influence the regulation of the autonomic nervous system and contribute to the suppressive effect on deterioration of skin barrier function.  相似文献   

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