Thermoneutral immersion exercise accelerates heart rate recovery: A potential novel training modality     

Mauricio Garzon  Olivier Dupuy  Laurent Bosquet  Anil Nigam  Alain Steve Comtois  Martin Juneau 《European Journal of Sport Science》2017,17(3):310-316

This study compared heart rate recovery (HRR) after incremental maximal exercise performed at the same external power output (P_ext) on dry land ergocycle (DE) vs. immersible ergocycle (IE). Fifteen young healthy participants (30?±?7 years, 13 men and 2 women) performed incremental maximal exercise tests on DE and on IE. The initial P_ext on DE was 25?W and was increased by 25?W/min at a pedalling cadence between 60 and 80?rpm, while during IE immersion at chest level in thermoneutral water (30°C), the initial P_ext deployment was at a cadence of 40?rpm which was increased by 10?rpm until 70?rpm and thereafter by 5?rpm until exhaustion. Gas exchange and heart rate (HR) were measured continuously during exercise and recovery for 5?min. Maximal HR (DE: 176?±?15 vs. IE 169?±?12?bpm) reached by the subjects in the two conditions did not differ (P?>?.05). Parasympathetic reactivation parameters (ΔHR from 10 to 300?s) were compared during the DE and IE HR recovery recordings. During the IE recovery, parasympathetic reactivation in the early phase was more predominant (HRR at Δ10–Δ60?s, P?<?.05), but similar in the late phase (HRR at Δ120–Δ300?s, P?>?.05) when compared to the DE condition. In conclusion, incremental maximal IE exercise at chest level immersion in thermoneutral water accelerates the early phase parasympathetic reactivation compared to DE in healthy young participants.  相似文献   

普通高校体育课对大学生心肺功能影响的实验研究          下载免费PDF全文

高谊 《河北体育学院学报》2016,30(4):42-47

运用文献资料法、教学实验法和数理统计法,就高校体育课对大学生心肺功能的影响进行实验研究.结果显示:体育课能有效改善大学生的心肺功能;情感策略教学方法对大学生的心功能改善具有明显的促进作用,对肺功能FVC、FEV1.0、MVV等指标也有一定程度的提高作用,虽然不具显著性,但比传统教学方法仍显示出较大的优势.建议高校体育教学改革要以“促进青少年身心健康、体魄强健”为方向,以提高大学生体质健康水平为基础目标,创新教学模式和方法,不断优化教学效果.  相似文献   

Effects of heat acclimation on hand cooling efficacy following exercise in the heat     

Elizabeth L. Adams  Lesley W. Vandermark  J. Luke Pryor  Riana R. Pryor  Rachel M. VanScoy  Craig R. Denegar 《Journal of sports sciences》2017,35(9):828-834

This study examined the separate and combined effects of heat acclimation and hand cooling on post-exercise cooling rates following bouts of exercise in the heat. Seventeen non-heat acclimated (NHA) males (mean ± SE; age, 23 ± 1 y; mass, 75.30 ± 2.27 kg; maximal oxygen consumption [VO₂ max], 54.1 ± 1.3 ml·kg^?1·min^?1) completed 2 heat stress tests (HST) when NHA, then 10 days of heat acclimation, then 2 HST once heat acclimated (HA) in an environmental chamber (40°C; 40%RH). HSTs were 2 60-min bouts of treadmill exercise (45% VO₂ max; 2% grade) each followed by 10 min of hand cooling (C) or no cooling (NC). Heat acclimation sessions were 90–240 min of treadmill or stationary bike exercise (60–80% VO₂ max). Repeated measures ANOVA with Fishers LSD post hoc (α < 0.05) identified differences. When NHA, C (0.020 ± 0.003°C·min^?1) had a greater cooling rate than NC (0.013 ± 0.003°C·min^?1) (mean difference [95%CI]; 0.007°C [0.001,0.013], P = 0.035). Once HA, C (0.021 ± 0.002°C·min^?1) was similar to NC (0.025 ± 0.002°C·min^?1) (0.004°C [?0.003,0.011], P = 0.216). Hand cooling when HA (0.021 ± 0.002°C·min^?1) was similar to when NHA (0.020 ± 0.003°C·min^?1) (P = 0.77). In conclusion, when NHA, C provided greater cooling rates than NC. Once HA, C and NC provided similar cooling rates.  相似文献   

Objective and subjective methods for quantifying training load in wheelchair basketball small-sided games     

Aitor Iturricastillo  Cristina Granados  Asier Los Arcos  Javier Yanci 《Journal of sports sciences》2017,35(8):749-755

The aim of the present study was to analyse the training load in wheelchair basketball small-sided games and determine the relationship between heart rate (HR)-based training load and perceived exertion (RPE)-based training load methods among small-sided games bouts. HR-based measurements of training load included Edwards’ training load and Stagno’s training impulses (TRIMP_MOD) while RPE-based training load measurements included cardiopulmonary (session RPEres) and muscular (session RPEmus) values. Data were collected from 12 wheelchair basketball players during five consecutive weeks. The total load for the small-sided games sessions was 67.5 ± 6.7 and 55.3 ± 12.5 AU in HR-based training load (Edwards’ training load and TRIMP_MOD), while the RPE-based training loads were 99.3 ± 26.9 (session RPEres) and 100.8 ± 31.2 AU (session RPEmus). Bout-to-bout analysis identified greater session RPEmus in the third [P < 0.05; effect size (ES) = 0.66, moderate] and fourth bouts (P < 0.05; ES = 0.64, moderate) than in the first bout, but other measures did not differ. Mean correlations indicated a trivial and small relationship among HR-based and RPE-based training loads. It is suggested that HR-based and RPE-based training loads provide different information, but these two methods could be complementary because one method could help us to understand the limitations of the other.  相似文献   

全真道哲学的意蕴及其理论底色     

丁原明 《商丘师范学院学报》2012,(7):32-37

"真性"论、"真心"论和"真行"论,堪称标识全真道哲学思想特征的三个基本环节。这三个基本环节既表征着"全真"哲学的逻辑建构,又分别从本体论、功夫炼养论和思想、道德行为方面折射着该哲学的意蕴和去伪存真的理论底色。在今天的改革大潮面前,全真道倘若选择向其早期优秀哲学传统回归的路径,可能更有益于其发展。  相似文献   

银行监督、利率管制与中小企业融资   总被引：1，自引：0，他引：1  

刘宇光 《徐州师范大学学报(哲学社会科学版)》2005,31(3):85-88,92

自有资金较少的中小企业只有在受到监督的情况下才能得到贷款。而监督需要成本,在监督成本较高的情况下,银行就不愿意发放监督贷款,中小企业就很难得到融资。只有进行利率市场化改革和降低监督成本,才能解决中小企业融资难的问题。  相似文献   

探讨人民币汇率制度的发展方向     

魏星 《徐州师范大学学报(哲学社会科学版)》2002,28(3):34-37

经济全球化和金融自由化推动了金融全球化的迅速发展。金融环境的变车呼唤着我国僵化的人民币汇率由有管理的浮动制度向真正的管理浮动制度转变。尤其进入新世纪，我国在经历了经济制度改革、创新后，经济日新月异，无论从GDP的年增长速度、国际收支状况，还是从金融市场的发展角度看，都具备了汇率制度改进的条件。在充分利用这一改革契机的同时，我们应该意识到经济、金融环境稳定对于一国改革、发展的重要性，认识到改革方式会直接制约改革成铲，所以汇率制度的发展应坚持循序渐进的原则，不宜完全浮动化,而适宜采取汇率目标区的形式，并注重加强亚洲地区的金融合作，增强汇率制度的稳定性。  相似文献   

关于义务教育办学效益的思考   总被引：2，自引：0，他引：2  

阎庆东 《民族教育研究》2002,13(2):57-59

办学效益的问题长期以来未得到应有的重视。义务教育办学效率评价指标包括义务教育的发展水平指标，投入水平指标，管理水平指标和教育质量水平指标，评价义务教育的办学效益高低，其中一个重要指标应是按时毕业率。  相似文献   

关于蒙牛公司成长性的实证应用研究     

杨艳 《内蒙古师范大学学报(哲学社会科学版)》2006,35(4):69-72

成长性作为企业努力追求的目标之一，一直是理论界关注的焦点，然而目前某些本来具有良好成长性的企业会突然面临现金短缺的危机。笔者以企业融资结构理论为基础，以高速成长型企业蒙牛公司为例。运用一种有效的财务计算方法，既能有效预测企业的成长速度，又能帮助企业克服因高速成长所带来的现金短缺问题。  相似文献   

此自引率非彼自引率——学术期刊的自引证率与自被引率错引举隅     

金铁成 《编辑学报》2016,28(3):251-252

为了使人们正确区分期刊的自引证率与自被引率,通过文献调研法,用案例的形式对已公开出版的论文中的期刊自引率的错误引用行为进行分析.错误引用类型为自被引率被误认为自引证率,自引证率被误认为自被引率.提醒人们进行期刊自引率研究时应严格区分这2种不同形式的自引率.  相似文献