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1.
BMI和心肺适能对全代谢综合征男性最大脂代谢水平的影响   总被引:1,自引:0,他引:1  
目的:探究BMI和心肺适能对全代谢综合征男性最大脂代谢水平的影响.方法:采用CDS代谢综合征诊断标准募集24名全代谢综合征(tMS)男性.血清指标检测采用酶法和放免法.直接测定最大耗氧量和最大有氧功.间接测热法和非连续递增负荷法检测最大脂代谢水平.分别依据BMI、最大耗氧量的平均值将被试分为高,低BMI组,高、低心肺适能组.结果:tMS男性整体最大脂氧化率(MFOR)为151.58±20.64 mg/min,最大脂氧化强度(Fatmax)为28.48±5.98%VO2max,Fatmax相应RER为0.94±0.01;供能交叉点为33.42±6.96%VO2max,心肺适能水平为18.25±2.68 ml/kg/mim;高、低BMI组间心肺适能、MFOR、Fatmax和交叉点均无显著性差异;高、低心肺适能组间MFOR具有非常显著性差异(P<0.01),但BMI、Fatmax和交叉点强度均无显著性差异;tMS男性BMI与MFOR相关不具显著性,心肺适能与MFOR具显著性正相关(r=0.75,P<0.01).结论:全代谢综合征男性最大脂氧化强度处于低有氧强度范围,tMS男性最大脂氧化率受心肺适能水平影响,而BMI对其无显著影响.  相似文献
2.
运动训练后个体的机能水平受多种因素影响,其中环境和遗传因素在很大程度上起决定作用。某一群体可能因携带特定基因型对运动训练 具有更高的敏感性,从而表现出更好的训练效果。训练效果的遗传学研究已开展40余年,在有氧耐力训练效果的个体差异领域,研究最系统,成果 也最丰富,但有关心肺健康特征指标有氧耐力训练效果的遗传预测标记研究方兴未艾。为此,综述了迄今为止该领域的候选基因法及全基因组研 究进展,旨在为相关研究的开展提供参考和研究方向。综述后发现,40余个基因的愈百位点/单体型与我国北方汉族人的有氧耐力训练敏感性相 关,血管紧张素转化酶基因等18个候选基因的作用则有待商榷。在全基因组研究中,训练后在50 W功率输出水平下每搏量(SV50)和亚极量运动 心率(HR50)分别与驱动蛋白家族成员5B基因编码区内的rs211302和位于cAMP反应元件连接蛋白1基因座5’区的rs2253206及rs2360969相关联; 通过将转录物组学与基因组学技术结合,获得了11个可共同影响23%VO2max训练效果变化量的SNPs;而在多个HERITAGE项目研究中,则分别发 现了与45%的VO2max训练效果个体差异显著相关的16个SNPs,100%影响HR50训练效果个体异质性的9个SNPs,以及20%影响20周标准耐力训 练后60% VO2max强度运动下摄氧量(△VO260)的13个SNPs及单体型。  相似文献
3.
本文对18名大学生运动员进行了为期6周的水中跑与陆上跑有氧训练比较研究,结果显示,水中跑训练是一种低冲击有氧训练方式,能提供足够的训练刺激,产生与陆上训练相媲美的心肺反应,提高运动员的最大吸氧量,保持陆上跑的竞技成绩,可作为陆_E~Jll练的辅助/交叉训练方式,弥补陆上有氧训练的不足。  相似文献
4.
本文通过文献资料法和逻辑分析方法对心肺耐力于大学生的意义进行分析和表述。心肺耐力是健康评价指标中最重要的指标之一,诸多调查和研究显示我国大学生的心肺耐力现状堪忧,心肺耐力对大学生心生理健康都具有重要意义,本文提出了改进的建议,以提高大学生的心肺耐力达到促进健康的目的。  相似文献
5.
Cardiorespiratory fitness (CRF) is associated with health benefits in children, improving cardiac morphology, cardiovascular disease risk factors, and biological outcomes. This study aimed to examine the substitution effects of displaying a fixed duration of sedentary time with a fixed duration of physical activity (PA) at different intensities on children’s CRF. A total of 315 children (136 boys) were assessed (age: 10.6 ± 0.6 years old). Outcomes at baseline and follow-up (16-months) were CRF determined using a maximal cycle test and sedentary time and PA measured with accelerometers. Data were analysed by isotemporal substitution analyses estimating the effect of reallocating 30 min/day of sedentary time by light (LPA), moderate (MPA) and vigorous physical activity (VPA) on CRF. VPA was positively and significantly associated with CRF cross-sectional (β = 0.026, < 0.001) and prospectively (β = 0.010, < 0.001). Reallocating 30 min/day of sedentary time into VPA was positively cross-sectionally (β = 0.780, < 0.001) and prospectively (β = 0.303, < 0.05) associated with CRF. Conversely, relocating 30-minutes of sedentary time into 30 minutes of LPA and MPA was not associated with CRF. These results suggest that reallocating an equal amount of time from sedentary into VPA is cross-sectional and prospectively associated with a favourable CRF.  相似文献
6.
This study evaluated the acute effects of interrupting prolonged sitting with an accumulated 2 h of light-intensity walking on postprandial cardiometabolic risk markers. In this randomised crossover trial, 24 participants (twelve males) aged 18–55 years took part in two, 6.5 h conditions: 1) prolonged sitting (SIT) and 2) sitting interrupted hourly with 20 min light-intensity treadmill desk walking at between 1.2–3.5 km/h−1 (INT-SIT). Standardized meals were provided at 0 h and 3 h. Blood samples and blood pressure measures were taken hourly. Statistical analyses were completed using linear mixed models. Postprandial incremental area under the curve responses (mmol/L∙6.5 h) for glucose (4.52 [3.47, 5.56] and 6.66 [5.62, 7.71] for INT-SIT and SIT, respectively) and triglycerides (1.96 [0.96, 2.96] and 2.71 [1.70, 3.71] for INT-SIT and SIT, respectively) were significantly lower in INT-SIT than SIT. Mean systolic and diastolic blood pressure responses were lower by 3% and 4%, respectively, in INT-SIT than SIT (P < 0.05). There was no significant condition x sex interaction effect for any outcomes (P > 0.05). These findings suggest that interrupting sitting with an accumulated 2 h of light-intensity walking acutely improves cardiometabolic risk levels in males and females compared with prolonged sitting.  相似文献
7.
Research from several countries has documented a decline in physical activity (PA) levels and in participation in organized sport with increasing age, indicating that organized sport may be of importance to adolescents’ cardiorespiratory fitness (CRF). Purpose: The purpose of this study was to examine how regular participation in organized and unorganized PA affected the development of adolescents’ CRF (peak oxygen consumption [VO2peak]), when controlled for sex interaction. Method: Data on direct measures of VO2peak and participation in organized PA among adolescents organized into 3 groups (participation in organized sport, participation in unorganized PA, and no weekly PA) were collected from 76 students (39 boys and 37 girls), when they were aged 14 and 19 years old. Results: Statistically significant differences were found between VO2peak values in the 3 groups at both 14 years of age, F(2, 73) = 7.16, p < .05, ƞ2 = .170, and 19 years of age, F(2, 73) = 14.00, p < .05, ƞ2 = .300, independent of sex at both 14 and 19 years of age, F(2, 73) = 0.05, p > .05, ƞ2 = .02, and F(2, 73) = 0.05, p > .05, ƞ2 = .00. Adolescents participating in organized sport also had statistically significantly higher VO2peak values than adolescents participating in unorganized PA and those with no weekly PA, at both 14 and 19 years of age. Conclusion: From a health perspective, in terms of CRF, the findings highlight the importance of encouraging adolescents to participate in organized sport and to refrain from dropping out of organized sport programs.  相似文献
8.
We examined independent and joint associations of objectively measured physical activity (PA) and physical fitness (PF) with pain, fatigue and the overall impact of fibromyalgia in 386 fibromyalgia women aged 51.2 ± 7.6 years. Levels of PA (light, moderate and vigorous) and PF were measured with triaxial accelerometry and the Senior Fitness Test, respectively. We used the Short-Form health survey-36 pain sub-scale and the Multidimensional Fatigue Inventory to assess pain and multiple dimensions of fatigue, respectively. The impact of fibromyalgia was studied with the Revised Fibromyalgia Impact Questionnaire (FIQR). Both, total PA and global PF were independently associated with pain pressure threshold, SF-36 pain, reduced activity, reduced motivation and FIQR total score (all, P ≤ 0.027). The associations between total PA and symptoms were weaker than those observed between global PF and symptoms. Overall, unfit patients with low PA showed a worse profile that fit patients with high PA (all, P ≤ 0.001). In summary, PA and PF are independently associated with pain, fatigue and the overall impact of fibromyalgia in women. Although PF presented greater associations with symptoms, the results suggest that both being physically active and keep adequate fitness levels might be convenient for fibromyalgia women.  相似文献
9.
Recently, there has been growing interest in high-intensity interval training (HIT) as a strategy to improve health. In this pilot study, we examined the feasibility of a 4-week low-volume HIT and its effects on cardiorespiratory fitness (CRF), blood pressure (BP) and enjoyment in overweight and obese youth. Twelve adolescents (body mass index (BMI): 34.8 ± 3.9 kg · m2, 14.9 ± 1.5 years) participated in 12 sessions of HIT (10 × 60 s cycling bouts eliciting ~90% maximal heart rate, interspersed with 90 s recovery, 30 min/session, 3 sessions/week) over ~4 weeks. All the participants completed the study and exercise attendance averaged 92%. Despite no changes in body weight and total fat, HIT resulted in significant (P < 0.01) increases in CRF (pre: 20.1 versus post: 22.2 ml · kg‒1 · min‒1) and exercise time (pre: 425 versus post: 509 s) during peak oxygen uptake test, and a reduction in resting systolic BP (pre: 115.8 versus post: 107.6 mmHg). The majority of study participants (83%) enjoyed HIT and more than half of the participants (58%) reported that HIT is a more enjoyable form of exercise compared to other types of exercises. Low-volume HIT is a useful strategy to promote exercise participation and improve cardiovascular health in overweight and obese youth.  相似文献
10.
This study examines the association between prolonged sedentary time and breaks in sedentary time with cardiometabolic risk in 10–14-year-old children. This cross-sectional design study analysed accelerometry-determined sedentary behaviour and physical activity collected over 7 days from 111 (66 girls) UK schoolchildren. Objective outcome measures included waist circumference, fasting lipids, fasting glucose, blood pressure, and cardiorespiratory fitness. Logistic regression was used for the main data analysis. After adjustment for confounders, the odds of having hypertriglyceridaemia (= 0.03) and an increased clustered cardiometabolic risk score (= 0.05) were significantly higher in children who engaged in more prolonged sedentary bouts per day. The number of breaks in sedentary time per day was not associated with any cardiometabolic risk factor, but longer mean duration of daily breaks in sedentary time were associated with a lower odds of having abdominal adiposity (= 0.04) and elevated diastolic blood pressure (= 0.01). These associations may be mediated by engagement in light activity. This study provides evidence that avoiding periods of prolonged uninterrupted sedentary time may be important for reducing cardiometabolic disease risk in children.  相似文献
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