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Correlation analysis of national elite Chinese male table tennis players’ shoulder proprioception and muscle strength

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World Journal of Clinical Cases 2022年第24期10卷 8514-8524页

作者： Xue-Dong Shang En-Ming Zhang Zhen-Lei Chen Lei Zhang Jing-Hua Qian institute of Sport Medicine National Research Institute of Sports MedicineBeijing 100061China School of sports Medicine and Rehabilitation Beijing Sport UniversityBeijing 100084China School of Physical Education Hubei University of EducationWuhan 430205Hubei ProvinceChina Graduate School Shandong Sport UniversityJinan 250102Shandong ProvinceChina

BACKGROUND Shoulder is the most injured part in table tennis players,and it takes multiple roles in transmitting power and striking the center of the ball during the *** is strongly correlated with high level of athletic *** is customary to assume that there is a correlation between proprioception and muscle strength and therefore proprioceptive assessment and rehabilitation is often *** To investigate the correlation between isokinetic muscle strength and proprioception in the internal and external rotation muscle groups of elite Chinese male table tennis players,to provide reference for physical training and rehabilitation of elite table tennis *** A total of 19 national elite table tennis players from the Chinese National Table Tennis Team were recruited in this *** of them had more than 10 years training experience and had participated major competitions such as the National Games and World Youth *** 2000 was used to test the peak torque of internal and external rotation isokinetic concentric contraction of the athletes'bilateral shoulder joints at low speed(60°/s)and high speed(180°/s)respectively;IsoMed 2000 was used to conduct the Joint Position Reproduction test to evaluate the athletes'proprioceptive ability capacity at low speed(60°/s)and high speed(180°/s)*** the data satisfied the normal distribution,the correlation between the differences in peak torque s and angles in different directions was analyzed using a Pearson simple linear model;otherwise,Spearman correlation analysis was *** comparison of proprioceptive ability between the table tennis racket-holding hand and non-racket-holding hands was performed using independent samples t-test if the data satisfied a normal distribution;otherwise,the Mann-Whitney U test was *** There was no direct linear correlation between the strength and proprioceptive correlation analysis at slow speed(60°/s)and fast s

关键词： Elite table tennis player Shoulder Proprioception Muscle strength Correlation analysis

The Impact of Tournament Load on Neuromuscular Function, Perceived Wellness and Coach Ratings of Performance During Intensified Youth Netball Competition

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Journal of Science in Sport and Exercise 2023年第1期5卷 16-24页

作者： Marcus Lee Jericho Wee Nick Dobbin Quintin Roman Gabriel Choong Sport Science National Youth Sports InstituteSingaporeSingapore Department of Health Professions Manchester Metropolitan UniversityManchesterUK Human Potential Translational research Programme Yong Loo Lin School of MedicineNational University of SingaporeSingaporeSingapore Performance Pathway National Youth Sports InstituteSingaporeSingapore

Purpose This study examined the effects of tournament load on neuromuscular function,perceived wellness and coach rat-ings of performance across two 6-day netball *** Thirty-nine female youth netballers(age=14.6±0.5 years,stature=165.9±4.7 cm,body mass=56.5±7.2 kg)were categorised as HIGH(10-11 matches,n=20)or LOW(6 matches,n=19)tournament *** load,jump height,perceived wellness and coach ratings of performance were monitored *** HIGH tournament load resulted in greater reductions in jump height on match-day 4(-8.3%,±5.6%)when compared to *** tournament load resulted in greater reductions in perceived soreness(-0.9,±1.1 AU)and overall wellness(-2.6,±2.3 AU)on match-day 3,and a greater reduction in perceived sleep(-0.9,±1.1 AU)on match-day *** tournament load was negatively associated with sleep quality and coach ratings of performance(effect size correlation=-0.34 to-0.47)when compared to *** Our results indicate that a higher tournament load resulted in greater increases in neuromuscular fatigue,reduced perceived wellness,and lower ratings of *** should consider pre-tournament preparation and monitoring strategies to minimise the physiological disturbances during an intensified tournament.

关键词： Netball Monitoring Post-match fatigue Youth tournament Tournament structure

Organized physical activity and sedentary behaviors in children and adolescents with autism spectrum disorder,cerebral palsy,and intellectual disability

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世界精神病学杂志 2023年第9期13卷 685-697页

作者： Amin Nakhostin-Ansari Monir Shayestehfar Alireza Hasanzadeh Fateme Gorgani Amirhossein Memari sports Medicine research Center Neuroscience InstituteTehran University of Medical SciencesTehran ***Iran Medical School Tehran University of Medical SciencesTehran ***Iran Digestive Disease research institute Shariati HospitalTehran University of Medical SciencesTehran ***Iran

BACKGROUND There is little data on physical activity(PA),organized PA(OPA),and sedentary behaviors in autism spectrum disorders(ASD)and other neurodevelopmental disorders in developing *** To examine OPA,non-OPA,and sedentary behaviors and their associated factors in children and adolescents with ASD,cerebral palsy(CP),and intellectual disability(ID).METHODS A total of 1020 children and adolescents with ASD,CP,and ID were assessed regarding the child and family information as well as the Children’s Leisure Activities Study *** The results showed that the OPA level was significantly lower than non-OPA in all ***,the OPA level was significantly lower in the CP group compared to ASD and ID groups(P<0.001).Also,moderate(P<0.001),vigorous(P<0.05),and total(P<0.001)physical activity levels were significantly different between all three groups,with the values being higher in the ASD group compared to the other *** mean of the total sedentary behavior duration in the ASD group(1819.4 min/week,SD:1680)was significantly lower than in the CP group(2687 min/week,SD:2673)(P=0.007)but not ID group(2176 min/week,SD:2168.9)(P=0.525).CONCLUSION Our findings remark on the participation rate of PA,OPA,and sedentary behaviors of children and adolescents with ASD,CP,and ID in a developing *** contrast,the need for developing standards of PA/OPA participation in neurodevelopmental disorders is discussed.

关键词： Neurodevelopmental disorders Physical disability Mental disability Active lifestyle

Ultrastrong multifunctional assembled 2D materials

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Science China Materials 2024年第10期 3415-3416页

作者： Yury Gogotsi A.J.Drexel Nanomaterials institute and Department of Materials Science and Engineering Drexel University

The availability of materials determines progress in engineering;those with superior,novel properties enable new *** and strong carbon fibers changed the aerospace and sports equipment fields,and zeolites with control...

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Sport level and sex differences in sport-related concussion among Japanese collegiate athletes:Epidemiology,knowledge,reporting behaviors,and reported symptoms

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sports Medicine and Health Science 2023年第3期5卷 229-238页

作者： Shota Tanaka Ryo Sagisaka Etsuko Sone Hideharu Tanaka research institute of Disaster Management and EMS Kokushikan UniversityJapan Kokushikan sports Promotion Center Kokushikan UniversityJapan Department of Integrated Science and Engineering for Sustainable Societies Chuo UniversityJapan Department of sports Medicine Kokushikan UniversityJapan

This study investigated the incidence of sport-related concussion(SRC)in sports,effect of athlete knowledge on reporting behavior differences between collegiate and non-collegiate athletes,and differences in SRC symptoms between sexes and level of *** this cross-sectional survey,1344 Japanese collegiate and non-collegiate athletes from a single institute were *** a web-based survey,demographics,general SRC,knowledge of SRC,the most recent SRC reporting behaviors,and symptom presentation were *** prevalence of SRC during the academic year 2016-2017 was 2.68(95%confidence interval[CI]:1.88-3.69)across all *** prevalence of SRC was 33.3(95%CI:17.96-51.83)in rugby union and 8.33(95%CI:1.03-27.00)in women's *** prevalence of SRC in males(3.47[95%CI:2.38-4.86]was 3.65 times higher than that in females(0.95[95%CI:0.26-2.41]).In total,the mean total score of knowledge was 5.30(4.2)across 25 questions;dizziness was the most well-known symptom(867/1344,64.5%),followed by headache(59.3%).Being more emotional(44/1345,3.3%)was the least frequently known *** of participation did not affect scores(5.16[3.96]vs.5.52[4.54];p=0.131).All 87 disclosing participants experienced drowsiness and irritability and felt more *** terms of sex and participant level,no significant differences were found in any *** study found very low rates of concussion education in *** of concussion education is essential in the future to recognize concussion earlier and prevent severe concussive injury.

关键词： Disclosure Knowledge Attitudes Prevalence Brain injury

Cryo-self-assembled silk fibroin sponge as a biodegradable platform for enzyme-responsive delivery of exosomes

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Bioactive Materials 2022年第2期7卷 505-514页

作者： Muyang Sun Qi Li Huilei Yu Jin Cheng Nier Wu Weili Shi Fengyuan Zhao Zhenxing Shao Qingyang Meng Haifeng Chen Xiaoqing Hu Yingfang Ao Department of sports Medicine Institute of Sports Medicine of Peking UniversityBeijing Key Laboratory of Sports InjuriesPeking University Third Hospital49 North Garden RoadHaidian DistrictBeijing100191China Department of Biomedical Engineering College of Future TechnologyPeking UniversityBeijing100871China

Although advances in protein assembly preparation have provided a new platform for drug delivery during tissue engineering,achieving long-term controlled exosome delivery remains a significant ***-dominated exosome release using protein hydrogels results in burst release of ***,a fibroin-based cryo-sponge was developed to provide controlled exosome *** chains can self-assemble into silk I structures under ice-cold conditions when annealed above the glass transition *** release is enzyme-responsive,with rates primarily determined by enzymatic degradation of the *** vivo experiments have demonstrated that exosomes remain in undigested sponge material for two months,superior to their retention in fibrin glue,a commonly used biomaterial in clinical *** cryo-sponges were implanted subcutaneously in nude *** exosome-containing sponge group exhibited better neovascularization and tissue ingrowth effects,demonstrating the efficacy of this exosome-encapsulating strategy by realizing sustained release and maintaining exosome *** silk fibroin cryo-sponges containing exosomes provide a new platform for future studies of exosome therapy.

关键词： Exosomes Silk fibroin Cryo-sponge Sustained drug delivery Enzyme-responsive

A crosstalk-free dual-mode sweat sensing system for naked-eye sweat loss quantification via changes in structural reflectance

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Bio-Design and Manufacturing 2024年第4期7卷 428-438页

作者： Bowen Zhong Hao Xu Xiaokun Qin Lingchen Liu Hailong Wang Lili Wang State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 100049China

Sweat loss monitoring is important for understanding the body’s thermoregulation and hydration status,as well as for comprehensive sweat *** recent advances,developing a low-cost,scalable,and universal method for the fabrication of colorimetric microfluidics designed for sweat loss monitoring remains *** this study,we propose a novel laserengraved surface roughening strategy for various flexible *** process permits the construction of microchannels that show distinct structural reflectance changes before and after sweat *** leveraging these unique optical properties,we have developed a fully laser-engraved microfluidic device for the quantification of naked-eye sweat *** sweat loss sensor is capable of a volume resolution of 0.5µL and a total volume capacity of 11µL,and can be customized to meet different performance ***,we report the development of a crosstalk-free dual-mode sweat microfluidic system that integrates an Ag/AgCl chloride sensor and a matching wireless measurement flexible printed circuit *** integrated system enables the real-time monitoring of colorimetric sweat loss signals and potential ion concentration signals without ***,we demonstrate the potential practical use of this microfluidic sweat loss sensor and its integrated system for sports medicine via on-body studies.

关键词： Sweat loss sensor Microfluidic design Structural reflectance Dual-mode integration Crosstalk-free

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Do minimally invasive approaches affect long-term clinical outcomes of total knee arthroplasty?A cohort analysis with a minimum 10-year follow-up

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Chinese Medical Journal 2023年第11期136卷 1376-1378页

作者： Fuzhen Yuan Zewen Sun Jiangnan Fu Meng Yang Jiying Zhang Yourong Chen Jiakuo Yu Department of sports Medicine Peking University Third HospitalInstitute of Sports Medicine of Peking UniversityBeijing 100191China Qingdao Medical College Qingdao UniversityQingdaoShandong 266000China Department of sports Medicine The Affiliated Hospital of Qingdao UniversityQingdaoShandong 266003China

To the Editor:Total knee arthroplasty(TKA)is a safe and effective treatment for patients with end-stage knee osteoarthritis,with the conventional medial parapatellar(MP)approach for TKA,good visualization of the knee can be obtained,helping to achieve correct osteotomy,proper ligament balance and good prosthesis position,which are all important for good long-term results.[1]To improve functional recovery and rehabilitation,some studies have adopted a relatively small incision operation to improve operation.

关键词： knee arthroplasty medial

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Back to school after lockdown: The effect of COVID-19 restrictions on children’s device-based physical activity metrics

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Journal of Sport and Health Science 2022年第4期11卷 530-536页

作者： Liezel Hurter Melitta McNarry Gareth Stratton Kelly Mackintosh Applied sports TechnologyExercise and Medicine Research Centre(A-STEM)Swansea UniversitySwansea SA18ENUK

Background:The coronavirus disease-2019(COVID-19) pandemic and national lockdowns took away opportunities for children to be physically *** study aimed to determine the effect of the COVID-19 lockdown on accelerometer-assessed physical activity(PA) in children in ***:Eight hundred participants(8-18 years old),stratified by sex,age,and socio-economic status,wore Axivity AX3 accelerometers for7 days in February 2021,during the lockdown,and in May 2021,while in *** accelerometer data were processed in R-package GGIR,and cut-point data,average acceleration(AvAcc),intensity gradient,and the acceleration above which the most active X minutes are accumulated(MX) metrics were *** mixed models were used to assess the influence of time-point,sex,age,and socioeconomic status(SES) on ***:During lockdown,moderate-to-vigorous PA was 38.4±24.3 min/day;sedentary time was 849.4±196.6 min/day;mean± *** levels increased significantly upon return to school(all variables p <0.001).While there were no sex differences during lockdown(p=0.233),girls engaged in significantly less moderate-to-vigorous PA than boys once back in school(p <0.001).Furthermore,boys had more favorable intensity profiles than girls(intensity gradient:p <0.001),regardless of *** levels decreased with age at both time-points;upper secondary school girls were the least active group,with an average M30 of 195.2 mg(while in school).Conclusion:The lockdown affected boys more than girls,as reflected by the disappearance of the typical sex difference in PA levels during lockdown,although these were re-established on return to *** secondary school(especially girls) might need specific COVID-recovery intervention.

关键词： Accelerometer Intensity gradient MX metrics

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