检索结果-南通市图书馆

Pole Length Influences Performance During On-Snow Skating in Female Cross-Country Skiers

Journal of Science in Sport and exercise 2021年第4期3卷 348-354页

作者： Per-Øyvind Torvik Roland van den Tillaar Guro Bostad Øyvind Sandbakk Department of sports Sciences and Physical Education Nord UniversityLevangerNorway centre for Elite sports Research Department of Neuromedicine and Movement ScienceNorwegian University of Science and TechnologyTrondheimNorway

Purpose The purpose of this study was to examine the effect of pole length on performance and technique selection during a simulated skating cross-country(XC)skiing competition on snow in female XC *** Nine female XC skiers and biathletes(VO2max 63.6±6.2 mL/min/kg,age 22.9±3.5 years,body height 1.69±0.1 m and body mass 60.8±4.6 kg)completed two 5-km skating time-trail with maximal *** athletes had a minimum 4.5 h of rest between the two races,which were performed in a random order:one with self-selected poles(89.0%±0.6%of body height)and one with 7.5 cm increased pole length(94.0%±0.5%of body height).Speed in set terrain sections was determined and the selection of sub-technique was self-reported immediately after each race based on a detailed review of the entire *** Skiers performed on average 7.1±7.1 s(P=0.029)faster with the long poles,with this difference occurring during the first 200 m and in the uphill parts of the track,in which~5% more G3 and~5% fewer G2 sub-techniques were chosen(both P<0.05).The rating of perceived exertion was 1±0.9 point lower(P=0.04)and skiing technique was perceived to be~1.2±1.5 points better with long poles(P=0.038),while the physiological responses(i.e.,peak and average heart rate,and blood lactate concentration)did not differ between *** In conclusion,poles 7.5 cm longer than self-selected ones improved performance in skating,by enhancing speed in the initial phase(first 200 m)and in the uphill section of the *** addition,the longer poles induced more use of the G3 skating sub-technique.

关键词： XC skiing Skiing performance Skiing equipment Sub-technique selection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Methods for improving thermal tolerance in military personnel prior to deployment

引用

Military Medical Research 2021年第3期8卷 405-423页

作者： Edward Tom Ashworth James David Cotter Andrew Edward Kilding sports Performance Research Institute New Zealand(SPRINZ) Auckland University of Technology17 Antares PlaceRosedaleAuckland 0632New Zealand School of Physical Education Sport and Exercise SciencesUniversity of OtagoDunedinOtago 9016New Zealand

Acute exposure to heat, such as that experienced by people arriving into a hotter or more humid environment, can compromise physical and cognitive performance as well as health. In military contexts heat stress is exacerbated by the combination of protective clothing, carried loads, and unique activity profiles, making them susceptible to heat illnesses. As the operational environment is dynamic and unpredictable, strategies to minimize the effects of heat should be planned and conducted prior to deployment. This review explores how heat acclimation(HA) prior to deployment may attenuate the effects of heat by initiating physiological and behavioural adaptations to more efficiently and effectively protect thermal homeostasis, thereby improving performance and reducing heat illness risk. HA usually requires access to heat chamber facilities and takes weeks to conduct, which can often make it impractical and infeasible, especially if there are other training requirements and expectations. Recent research in athletic populations has produced protocols that are more feasible and accessible by reducing the time taken to induce adaptations, as well as exploring new methods such as passive HA. These protocols use shorter HA periods or minimise additional training requirements respectively, while still invoking key physiological adaptations, such as lowered core temperature, reduced heart rate and increased sweat rate at a given intensity. For deployments of special units at short notice(< 1 day) it might be optimal to use heat re-acclimation to maintain an elevated baseline of heat tolerance for long periods in anticipation of such an event. Methods practical for military groups are yet to be fully understood, therefore further investigation into the effectiveness of HA methods is required to establish the most effective and feasible approach to implement them within military groups.

关键词： Heat acclimation Thermoregulation Heat illness Physiology Human Conditioning Military

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cerebral and muscle tissue oxygenation during exercise in healthy adults: A systematic review

引用

Journal of Sport and Health Science 2024年第4期13卷 459-471,F0003页

作者： Diego Orcioli-Silva Victor Spiandor Beretta Paulo Cezar Rocha Santos Felipe Marroni Rasteiro Anita Brum Marostegan Rodrigo Vitorio Claudio Alexandre Gobatto Fulvia Barros Manchado-Gobatto Laboratory of Applied Sport Physiology(LAFAE) School of Applied Sciences(FCA)University of Campinas(UNICAMP)Limeira 13484-350Brazil Posture and Gait Studies Laboratory(LEPLO) Institute of BiosciencesSao Paulo State University(UNESP)Rio Claro 13506-900Brazil Physical Education Department School of Technology and SciencesSao Paulo State University(UNESP)Presidente Prudente 19060-900Brazil Department of Computer Science&Applied Mathematics Weizmann Institute of ScienceRehovot 7610001Israel Center of Advanced Technologies in Rehabilitation Sheba Medical CenterRamat Gan 5265601Israel Department of Sport Exercise and RehabilitationNorthumbria UniversityNewcastle upon Tyne NE18STUK

Background:Near-infrared spectroscopy(NIRS)technology has allowed for the measurement of cerebral and skeletal muscle oxygenation simultaneously during *** this technology has been growing and is now successfully used in laboratory and sports settings,this systematic review aimed to synthesize the evidence and enhance an integrative understanding of bloodﬂow adjustments and oxygen(O_(2))changes(i.e.,the balance between O_(2) delivery and O_(2) consumption)within the cerebral and muscle systems during ***:A systematic review was conducted using PubMed,Embase,Scopus,and Web of Science databases to search for relevant studies that simultaneously investigated cerebral and muscle hemodynamic changes using the near-infrared spectroscopy system during *** review considered manuscripts written in English and available before February 9,*** step of screening involved evaluation by 2 inde-pendent authors,with disagreements resolved by a third *** Joanna Briggs Institute Critical Appraisal Checklist was used to assess the methodological quality of the ***:Twenty studies were included,of which 80%had good methodological quality,and involved 290 young or middle-aged *** types of exercises were used to assess cerebral and muscle hemodynamic changes,such as cycling(n=11),treadmill(n=1),knee extension(n=5),isometric contraction of biceps brachii(n=3),and duet swim routines(n=1).The cerebral hemodynamics anal-ysis was focused on the frontal cortex(n=20),while in the muscle,the analysis involved vastus lateralis(n=18),gastrocnemius(n=3),biceps brachii(n=5),deltoid(n=1),and intercostal muscle(n=1).Overall,muscle deoxygenation increases during exercise,reaching a plateau in voluntary exhaustion,while in the brain,oxyhemoglobin concentration increases with exercise intensity,reaching a plateau or declining at the exhaustion ***:Muscle and cerebral oxygenation respond differently to exercise,with muscle

关键词： Near-infrared spectroscopy Hemodynamic Blood flow Brain Muscle metabolism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Functional Electrical Stimulation of Peroneal Muscles on Balance in Healthy Females

引用

Cyborg and Bionic Systems 2021年第1期2021卷 79-86页

作者： Zoe A.Bamber Wei Sun Rhea S.Menon Patrick C.Wheeler Ian D.Swain Daniel T.P.Fong National centre for Sport and exercise medicine School of SportExercise and Health SciencesLoughborough UniversityLoughboroughUK Division of Orthopaedics Trauma and Sports MedicineSchool of MedicineFaculty of Medicine and Health SciencesUniversity of NottinghamNottinghamUK Shandong Sport University JinanShandongChina Department of Sport and exercise medicine University Hospitals of Leicester NHS TrustLeicesterUK The Faculty of Science and Technology Bournemouth UniversityPooleDorsetUK

Balance improvement could contribute to ankle stability for the prevention of ankle *** electrical stimulation(FES)is an effective way of augmenting muscle activity and improving *** study investigated the effect of FES of peroneal muscles on single-and double-leg *** healthy females(age=23:1±1:6 years,height=1:63±0:07m,and weight=63:7±9:9 kg)performed single-and double-leg standing balance tests with eyes open and closed before and after 15-minute FES intervention during treadmill running at a comfortable,self-selected *** of peroneal muscles was provided bilaterally,using an Odstock Dropped Foot *** total excursion of the centre of pressure(COP)was calculated to assess the standing balance control *** total excursion of COP in single-and double-leg stance with eyes open reduced significantly after FES intervention by 14.7%(p0:05).Limb preference did not account for balance *** significant difference in total excursion of COP was found between preferred and less preferred limbs with both visual conditions(p>0:05).FES of peroneal muscles improved standing balance control with eyes open in double-leg and single-leg stance and with eyes closed in double-leg *** improvements in balance control with FES treatment did not vary concerning limb preference.

关键词： prevention stimulation Functional

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Diagnosis,treatment and complications of radial head and neck fractures in the pediatric patient

引用

World Journal of Orthopedics 2022年第3期13卷 238-249页

作者： Arno A Macken Denise Eygendaal Christiaan JA van Bergen Department of Orthopedic Surgery Amphia HospitalBreda 4818 CKNoord-BrabantNetherlands Department of Orthopedic Surgery and sports medicine Erasmus Medical CentreRotterdam 3015 GDSouth-HollandNetherlands

Radial head and neck fractures represent up to 14%of all pediatric elbow fractures and can be a difficult challenge in the pediatric *** up to 39%of proximal radius fractures,there is a concomitant fracture,which can easily be overlooked on the initial standard *** treatment options for proximal radius fractures in children range from non-surgical treatment,such as immobilization alone and closed reduction followed by immobilization,to more invasive options,including closed reduction with percutaneous pinning and open reduction with internal *** choice of treatment depends on the degree of angulation and displacement of the fracture and the age of the patient;an angulation of less than 30 degrees and translation of less than 50%is generally accepted,whereas a higher degree of displacement is considered an indication for surgical *** with limited displacement and non-surgical treatment generally result in superior outcomes in terms of patient-reported outcome measures,range of motion and complications compared to severely displaced fractures requiring surgical *** proper management,good to excellent results are achieved in most cases,and long-term sequelae are ***,severe complications do occur,including radio-ulnar synostosis,osteonecrosis,rotational impairment,and premature physeal closure with a malformation of the radial head as a result,especially after more invasive *** follow-up is therefore warranted.

关键词： Radial head Proximal radius Fracture Pediatrics Closed fracture reduction Open reduction fracture Fracture fixation Synostosis Osteonecrosis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Calcium intake,calcium homeostasis and health

引用

Food Science and Human Wellness 2016年第1期5卷 8-16页

作者： Fan Pu Ning Chen Shenghui Xue La Jolla Institute of Allergy&Immunology La JollaCA 92037USA Hubei exercise Training and Monitoring Key Laboratory Hubei Provincial Collaborative Innovation Center for Exercise and Health PromotionCollege of Health ScienceWuhan Sports UniversityWuhan 430079China

Calcium,as the most abundant mineral in human body,is involved in many physiological and pathological ***,we reviewed the key mechanisms of calcium homeostasis,including calcium sensing receptor regulation,intestinal calcium absorption,renal calcium reabsorption and bone calcium *** further discussed the roles of dietary calcium and vitamin D in diseases associated with dysfunctional regulation of ***,the over-dosed consumption of calcium could increase the risks for a series of diseases,such as kidney stone,myocardial infarction and stroke.

关键词： homeostasis intake vitamin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Intensity of effort and momentary failure in resistance training:Are we asking a binary question for a continuous variable?

引用

Journal of Sport and Health Science 2022年第6期11卷 644-647页

作者： James P.Fisher James Steele Dave Smith School of Sport Health and Social ScienceSolent UniversitySouthamptonSO140YNUK Research centre for Musculoskeletal and sports medicine Manchester Metropolitan UniversityManchesterM156BHUK

*** There is a growing body of research supporting the idea that a plethora of health benefits can result from resistance training using a low volume,high-effort approach(e.g.,increased metabolic rate and bone mineral density,a reduction in blood pressure,and improved muscle quality and insulin sensitivity,among ***,muscular strength and muscle massprimary goals and benefits of participation in resistance trainingare independently strong predictors of longevity and quality of life. Thus,many have sought to identify how the manipulation of resistance training variables might lead to“optimal”adaptations in such outcomes,as evidenced by repeated attempts over recent decades to review the literature and provide consensus statements on this topic.5-10 One variable that is often hotly debated within resistance training is training to failure.

关键词： resistance binary continuous

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Outcomes of the effect of exercise on cognitive function in patients with depression:A meta-analysis

引用

World Journal of Psychiatry 2024年第10期14卷 1558-1572页

作者： Xiao-Zhen Guo Cong Liu Jing Wang Hai-Rong Liu Department of Physical Education Tongji UniversityShanghai 200092China School of Physical Education Shanghai University of SportShanghai 200438China School of sports and Health Shanghai Lixin University of Accounting and FinanceShanghai 201620China Department of Physical Education Shanghai International Studies UniversityShanghai 201620China

BACKGROUND Major depressive disorder is a common mental disorder,characterized by a high rate of suicide and recurrence,which is frequently accompanied by cognitive impairments,particularly in executive function,memory,attention,and infor-mation processing *** such,improving the cognitive function in patients with depression and enhancing their quality of life are urgent *** To perform a systematic review and meta-analysis of the effects of exercise on cognitive function in patients with *** The PubMed,Web of Science,Cochrane Library,Embase,China National Knowledge Infrastructure,Wanfang Medical,VIP,and Biomedical Databases for randomized controlled trials(RCTs)databases were searched(from inception to October 19,2023)for studies investigating improvements in cognitive function in patients with depression through *** recommended by the Cochrane Handbook for RCT evaluation,and GRADEpro and Stata17 software,were employed for risk of bias assessment,evidence grading,forest plot construction,subgroup and sensitivity analyses,and assessment of publication *** Seventeen RCTs(1173 patients with depression)were *** had a small but significant positive effect on attention,with an effect size of 0.21,95%CI:0.07-0.34,Pexercise regimens of 30-60 minute/session,thrice a week,at moderate intensity,and sustained over 3-12 weeks,were associated with the most pronounced benefits(Pexercise could improve attention and information-processing speed in patients with depression,although improvements in executive function and memory are not significant.

关键词： exercise Depression Cognitive function Patients Meta-analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Validity of a noninvasive estimation of deep body temperature when wearing personal protective equipment during exercise and recovery

引用

Military Medical Research 2019年第4期6卷 328-339页

作者： Andrew P.Hunt Mark J.Buller Matthew J.Maley Joseph T.Costello Ian B.Stewart School of exercise and Nutrition Sciences&Institute of Health and Biomedical Innovation Queensland University of TechnologyBrisbaneQLDAustralia United States Army Research Institute of Environmental medicine NatickMAUSA Extreme Environments Laboratory Department of Sport and Exercise ScienceUniversity of PortsmouthPortsmouthUK

Background:Deep body temperature is a critical indicator of heat ***,direct measures are often invasive,costly,and difficult to implement in the *** study assessed the agreement between deep body temperature estimated from heart rate and that measured directly during repeated work bouts while wearing explosive ordnance disposal(EOD)protective clothing and during ***:Eight males completed three work and recovery periods across two separate *** consisted of treadmill walking on a 1%incline at 2.5,4.0,or 5.5 km/h,in a random order,wearing EOD protective *** temperature and relative humidity were maintained at 24℃and 50%[Wet bulb globe temperature(WBGT)(20.9±1.2)℃]or 32℃and 60%[WBGT(29.0±0.2)℃]on the separate days,*** rate and gastrointestinal temperature(TGI)were monitored continuously,and deep body temperature was also estimated from heart rate(ECTemp).Results:The overall systematic bias between TGI and ECTemp was 0.01℃with 95%limits of agreement(Lo A)of±0.64℃and a root mean square error of 0.32℃.The average error statistics among participants showed no significant differences in error between the exercise and recovery periods or the environmental *** TGI levels of(37.0–37.5)℃,(37.5–38.0)℃,(38.0–38.5)℃,and>38.5℃,the systematic bias and±95%Lo A were(0.08±0.58)℃,(–0.02±0.69)℃,(–0.07±0.63)℃,and(–0.32±0.56)℃,***:The findings demonstrate acceptable validity of the ECTemp up to 38.5℃.Conducting work within an ECTemp limit of 38.4℃,in conditions similar to the present study,would protect the majority of personnel from an excessive elevation in deep body temperature(>39.0℃).

关键词： Protective clothing Body core temperature Heat strain Heat stress Kalman filter Explosive ordnance disposal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Predictors of multiple injuries in individual distance runners:A retrospective study of 75,401 entrants in 4 annual races-SAFER XX

引用

Journal of Sport and Health Science 2022年第3期11卷 339-346页

作者： Sonja Swanevelder Nicola Sewry Martin Schwellnus Esme Jordaan Biostatistics Unit South African Medical Research CouncilParow 7575South Africa Sport Exercise Medicine and Lifestyle Institute(SEMLI)Faculty of Health SciencesUniversity of PretoriaPretoria 0081South Africa International Olympic Committee(IOC)Research centre Pretoria 0081South Africa Emeritus Professor of Sport and exercise medicine Faculty of Health SciencesUniversity of Cape TownBellville 7535South Africa Statistics and Population Studies Department University of the Western CapeBellville 7535South Africa

Background There are limited data on factors that predict an increased risk of multiple injuries among distance *** objective of this study was to determine risk factors that are predictive of individual runners with a high annual multiple injury risk(MIR).Methods A retrospective,cross-sectional study at 4 annual(2012-2015)Two Oceans 21.1 km and 56.0 km races in South Africa with 75,401 consenting race ***-related injury data were collected retrospectively through an online pre-race medical screening *** average number of injuries for each runner every year was calculated by taking a runner's race entry history and injury history into account and categorizing entrants into 4 MIR categories(high,intermediate,low,and very low(reference)).Multiple logistic regression modeling(odds ratios)was used to determine whether the following factors were predictive of a high MIR(average>1 injury/year):demographics,training and racing,chronic-disease history(composite chronic disease score(CCDS)),and history of *** Of all entrants,9.2%reported at least 1 injury,and 0.4%of entrants were in the high MIR category;the incidence rate was 2.5 injuries per 10 runner-years(95%confidence interval(95%CI):2.4-2.7).Significant factors predictive of runners in the high MIR category were:running for>20 years:OR=2.0(95%CI:1.3-3.1;p=0.0010);a higher CCDS:OR=2.2(95%CI:2.0-2.4;p20 years and those with multiple chronic diseases or a history of allergies were at higher risk of multiple running-related *** high-risk group can be targeted for further study and possible injury-prevention interventions.

关键词： Allergies Chronic diseases Multiple injuries Risk factors SAFER study

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：