Frontiers in Sports and Active Living最新文献

{"title":"Relationship between knee isokinetic muscle strength and countermovement jump height among elite male gymnasts.","authors":"Yijie Ma, Zixiang Zhou, Rangxi Jin, Dexin Wang, Chao Chen","doi":"10.3389/fspor.2025.1627059","DOIUrl":"10.3389/fspor.2025.1627059","url":null,"abstract":"<p><strong>Introduction: </strong>This study quantifies the isokinetic knee strength of elite male gymnasts and examines the relationship between concentric extensor strength, limb asymmetry, and countermovement jump (CMJ) height.</p><p><strong>Methods: </strong>A total of 18 elite male gymnasts participated in isokinetic strength testing, assessing concentric and eccentric actions during both extension and flexion of the knee at joint angular velocities of 60°/s, 180°/s, and 240°/s. Relative peak torque (RPT) of the knee flexors and extensors, the functional eccentric hamstring/concentric quadriceps (H_ecc/Q_con) ratio, and the inter-limb asymmetries were analyzed. CMJ height was assessed using a contact mat, and the relationship between concentric extensor RPT and limb asymmetries with CMJ height was analyzed using Pearson correlation coefficients analysis.</p><p><strong>Results: </strong>At an angular velocity of 180°/s, both an abnormal limb asymmetries in the concentric extensors was observed and the strongest negative correlation with CMJ height (<i>r</i> = -0.638, <i>p</i> < 0.05) was found. At an angular velocity of 240°/s, knee extensor strength demonstrated the strongest correlation with CMJ height (<i>r</i> = 0.962, <i>P</i> < 0.001).</p><p><strong>Discussion: </strong>Therefore, we recommend that gymnasts conduct regular isokinetic strength assessments, particularly focusing on concentric knee extensor strength and limb asymmetries, as they exhibit moderate to high correlations with CMJ height.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1627059"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12434408/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing angular momentum in the takeoff phase of medium-hill ski jumping.","authors":"Yuta Funato, Hirotaka Nakashima, Shinji Sakurai","doi":"10.3389/fspor.2025.1643241","DOIUrl":"10.3389/fspor.2025.1643241","url":null,"abstract":"<p><strong>Introduction: </strong>Athletic performance in competitive ski jumping is evaluated based on the aggregate scores of the jump distance and flying style. However, an understanding of how angular momentum influences performance, particularly during the approach to takeoff phases, is lacking. Therefore, this study aimed to quantify the angular momentum during the takeoff motion on a medium hill and to examine the appropriate angular momentum.</p><p><strong>Methods: </strong>The study participants included 21 jumpers (16 males and five females; height: 1.65 ± 0.09 m; total weight: 54.6 ± 8.9 kg; age: 19.2 ± 6.8 years) performing on a medium hill. The angular momentum of the center of gravity of the jumper + ski system (AM_CG) at takeoff was filmed at 200 Hz using a high-speed camera and analyzed in the sagittal plane.</p><p><strong>Results: </strong>As a result of confirming the relationship between AM_CG at takeoff and jump distance, a significant quadratic approximation curve was obtained, indicating that the value at the apex of the <i>X</i>-axis was 0.0391 s^-1 (<i>p</i> < 0.05).</p><p><strong>Discussion: </strong>This study shows that the appropriate AM_CG value at takeoff was approximately 0.0391 s^-1. The study findings are expected to contribute to coaching with objective indicators.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1643241"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12434471/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acute effects of Tai Chi with different practice emphasis on autonomic activity.","authors":"Dejian Duan, Haojie Huang, Wenbo Li, Cong Xiao, Dong Wang","doi":"10.3389/fspor.2025.1642123","DOIUrl":"10.3389/fspor.2025.1642123","url":null,"abstract":"<p><strong>Introduction: </strong>Exercise intensity, breathing patterns, and intentional meditation significantly influence autonomic nervous system activity. Tai Chi serves as an aerobic exercise stimulus. Additionally, it incorporates a distinctive breathing pattern. It is also seen as a meditative exercise. However, the acute effect of different Tai Chi factors on autonomic activity is unclear.</p><p><strong>Objective: </strong>This study aims to investigate the acute effects of Tai Chi with different practice emphasis on autonomic activity. The findings may guide the selection of Tai Chi techniques in exercise prescription.</p><p><strong>Methods: </strong>After health screening, 8 Traditional Chinese Medicine students (TCMS), 8 Competitive Tai Chi students (CTCS), and 9 Economics and Management students (EMS) were enrolled. Participants were assessed for indices related to autonomic activity, exercise intensity, respiration, and mind state during both quiet and Tai Chi conditions.</p><p><strong>Results: </strong>Results indicated that the RMSSD and SDNN values for TCMS were significantly higher than those of CTCS and EMS (<i>P</i> < 0.05). Heart rate was not significantly different between the groups during quiet and Tai Chi states (<i>P</i> > 0.05). Immediately following Tai Chi practice, TCMS exhibited significant reductions in thoughtfulness, anger, and inactivity (<i>P</i> < 0.05). No significant differences were noted in CTCS and EMS (<i>P</i> > 0.05).</p><p><strong>Conclusion: </strong>Tai Chi practices emphasizing mindfulness may be more effective in enhancing autonomic activity. It recommends the standing poles interventions for depression, insomnia, and other groups for more autonomic health benefits.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1642123"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12434074/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of transcranial direct current stimulation on the neuro-muscular control strategies of penalty kicks in soccer players.","authors":"Haoyang Wang, Hongxiang Zhang, Xin Li, Jinbang Zhu","doi":"10.3389/fspor.2025.1649809","DOIUrl":"10.3389/fspor.2025.1649809","url":null,"abstract":"<p><strong>Objective: </strong>This study aims to investigate the effects of transcranial direct current stimulation (tDCS) on the neuromuscular control of penalty kicks in soccer players. It also analyzes the relationship between neuromuscular control and the stability of motor performance following the intervention.</p><p><strong>Methods: </strong>Wireless surface electromyography (EMG) data were synchronously collected from 20 national first-level athletes during penalty kicks using a wireless EMG acquisition device. To obtain spinal-level motor output, the EMG signal envelopes were inversely mapped to the <i>α</i>-motor neuron pools across various spinal segments. Muscle synergy characteristics were analyzed using non-negative matrix factorization and K-Means clustering.</p><p><strong>Results: </strong>During the stance foot contact phase, tDCS led to more concentrated and less variable activation of lower limb muscle synergy, enhancing control of support and force transfer. In the kicking leg swing phase, muscle synergy was activated earlier and decayed more rapidly, maintaining swing velocity and ball striking accuracy while reducing energy expenditure. Additionally, anticipatory synergy adjustments appeared before movement transitions, indicating improved anticipatory action and adjustment capabilities after the intervention. As a result, neuromuscular control optimized the spatiotemporal structure of synergy, improving coordination and yielding more stable penalty kick performance.</p><p><strong>Conclusion: </strong>Transcranial direct current stimulation can enhance neuromuscular control efficiency by optimizing spinal motor output and improving the spatiotemporal structure of muscle synergy. This results in more stable and effective kicking actions. Reasonably adjusting the timing of tDCS intervention can help improve soccer players' kicking performance.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1649809"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12433942/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A qualitative examination of the evolving role of sports technology in collegiate coaching.","authors":"Mollie Brewer, Kevin Childs, Celeste Wilkins, Zachary R Smith, Spencer Thomas, Kristy Elizabeth Boyer, Jennifer A Nichols, Garrett F Beatty, Daniel P Ferris","doi":"10.3389/fspor.2025.1644099","DOIUrl":"10.3389/fspor.2025.1644099","url":null,"abstract":"<p><p>Coaches play a central role in shaping athlete performance and development. In collegiate sports, coaches must balance competitive goals with the broader needs of student-athletes. As technology becomes more available in sports, it is becoming increasingly embedded in the workflows and decision-making processes of coaching staff. While many recognize the growing presence of these tools in sports, there is limited understanding about how coaching staff select and integrate these tools into their professional practice. This study addresses this gap by investigating (1) the types of technologies that collegiate coaching staff use; (2) how coaches integrate those technologies into key coaching domains such as baseline testing, practice planning, and injury management; and (3) what motivates or hinders technology adoption in this environment. We conducted five semi-structured focus groups with 17 coaching staff members from National Collegiate Athletic Association (NCAA) Division I sports teams in the United States, representing men's American football, men's basketball, women's basketball, women's soccer, and women's volleyball. Participants included coaches, athletic trainers, strength and conditioning staff, dietitians, sports scientists, and administrative staff. We provide an inventory of technologies in active use to support key aspects of coaching. Our findings show that when aligned with coaching goals, technology offers valuable support for decision-making, individualized student-athlete management, and coach-athlete communication. These findings also point to the importance of supporting coaching staff in managing the growing demands of technology use. By highlighting how collegiate coaching staff apply technology, this study deepens understanding of what technology integration in coaching looks like in real-world practice. The insights may offer valuable direction for scholars, coaches, and organizations who aim to strengthen coaching practice and athlete outcomes through thoughtful integration of technology.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1644099"},"PeriodicalIF":2.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12434470/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Athletes' and spectators' expenditures during a medium-sized sport event: the case study of the Italian National University Sport Championship.","authors":"Luca Rossini, Lavinia Falese, Alexandro Andrade, Arthur Dutra, Marco Giglio, Daniela Federici","doi":"10.3389/fspor.2025.1528503","DOIUrl":"10.3389/fspor.2025.1528503","url":null,"abstract":"<p><strong>Introduction: </strong>The present study investigates the economic impact of the 2022 Italian National University Sport Championship (CNU), held in Cassino, Italy, with particular emphasis on the spending patterns of athletes, technical staff, and spectators.</p><p><strong>Methods: </strong>A cross-sectional survey was employed during the event to collect data from 963 participants, separated into two different groups: athletes/staff (Group A), and spectators (Group B). The survey addressed participants' spending patterns, satisfaction levels, and event experiences. The DEC (Direct Economic Impact Calculator) tool was employed to estimate the total economic contributions, while further analyses explored the differences in spending according to participant satisfaction and attributes.</p><p><strong>Results: </strong>The total direct economic impact of the event was estimated at €1,323,572, including €50,000 in organizer expenditures, which contributed to the support of 22 local jobs. Non-local spectators had a notable economic impact, with an average daily expenditure of €223, compared to €124 by athletes and staff. Satisfaction with public transport, the possibility to purchase local products, and positive interactions with the staff working at the event are among the key factors positively influencing spending. In contrast, engagement in ceremonial activities and feelings of nervousness were associated with lower spending levels.</p><p><strong>Discussion: </strong>These results underscore the significant economic influence of medium-sized sports events on local economies, highlighting the importance of improving visitor experiences to maximize economic benefits. The findings offer significant implications for event organizers and policymakers who seek to enhance the economic and social outcomes associated with these events.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1528503"},"PeriodicalIF":2.6,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12426268/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145064338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Padel vs. tennis doubles: a comparison of performance demands and game attributes.","authors":"Rūtenis Paulauskas, Domantas Šakinis, Bruno Figueira","doi":"10.3389/fspor.2025.1663379","DOIUrl":"10.3389/fspor.2025.1663379","url":null,"abstract":"<p><p>[This corrects the article DOI: 10.3389/fspor.2025.1540424.].</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1663379"},"PeriodicalIF":2.6,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12426309/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145064344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The relative age effect among female basketball players in the Israeli Premier League.","authors":"Simcha Avugos, Michal Malul","doi":"10.3389/fspor.2025.1644415","DOIUrl":"10.3389/fspor.2025.1644415","url":null,"abstract":"<p><p>In sports, the term <i>relative age effect</i> refers to the asymmetrical distribution of athletes based on their birth dates relative to an arbitrary cut-off date. Some studies indicate that athletes who were born shortly after this cut-off tend to have higher representation in elite sports leagues compared to those who were born later in the year. Yet the literature presents inconsistencies in empirical support for this effect. The aim of this study, therefore, was to examine the relative age effect in female basketball players from the Israeli Premier League, while distinguishing between domestic and foreign players (<i>n</i> = 215, M_age = 24.08 years, SD = 5.17; and <i>n</i> = 120, M_age = 30.33 years, SD = 3.68, respectively), and examining two alternative cut-off dates (January 1 and September 1). Data were collected over six seasons, 2018-2024. Chi-square values and odds ratios were calculated to examine the distribution of birth quarters compared to uniform distribution in general, and to Israeli and U.S. live birth data. The findings reveal that the relative age effect was insignificant among the players, regardless of their nationality. While a higher number of players were found to have been born in the second quarter of the year, this difference was statistically insignificant, regardless of whether a uniform distribution of births or normative population values were applied. As such, the findings of the current study do not support the existence of selection bias among coaches based on the birth dates of female professional basketball players in Israel.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1644415"},"PeriodicalIF":2.6,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12426048/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145064281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional range of motion for basic seated activities of daily living tasks.","authors":"Yuji Inagaki, Tomoya Ishida, Hiroyuki Sugimori, Takaaki Yoshimura, Akihiro Watanabe, Yumene Naito, Daisuke Sawamura","doi":"10.3389/fspor.2025.1646326","DOIUrl":"10.3389/fspor.2025.1646326","url":null,"abstract":"<p><strong>Introduction: </strong>Efficient performance of activities of daily living (ADLs) requires coordinated movement across multiple upper-limb joints. However, current assessments of joint range of motion (ROM) during ADLs often rely on subjective evaluation and lack precise quantitative data. The functional ROM required for upper-limb movements in a seated position remains unclear, despite its clinical relevance for older adults and individuals with mobility limitations who frequently perform ADLs while seated. Additionally, little is known about how joint-motion requirements differ across similar ADL tasks, such as eating with a spoon versus chopsticks or washing the top versus the back of the head. To address these issues, we aimed to establish standardized ROM values for common upper-limb-related ADLs using three-dimensional motion analysis to enhance rehabilitation goal setting.</p><p><strong>Methods: </strong>Thirty-one healthy adults (14 women; mean age 22.9 ± 1.9 years) completed six seated ADLs-face washing; hair washing (top, back); chopstick or spoon eating; bottled-water drinking. Marker-based motion capture (International society of biomechanics guidelines) recorded kinematics. Descriptive statistics and paired t-tests (<i>p</i> < 0.05) assessed task differences.</p><p><strong>Results: </strong>Significant differences in upper limb and neck joint angles were observed across ADL tasks. Shoulder elevation was highest during back hair washing (105.0° ± 14.6°) and lowest when eating with chopsticks (39.2° ± 10.9°). Elbow flexion peaked during face washing (122.3° ± 5.2°) and back hair washing (127.9° ± 5.7°), reflecting the need for close hand-to-face contact. Wrist extension was greatest during face washing (-28.7° ± 8.5°), while a significant difference was found between chopstick (-13.7° ± 12.5°) and spoon use (-5.6° ± 5.3°, <i>p</i> = 0.005), indicating task-specific hand control demands. Neck flexion also varied significantly between hair washing conditions (back > top, <i>p</i> < 0.001). Furthermore, when eating with a bowl rather than with a plate, participants showed significantly greater shoulder elevation, elbow flexion, and forearm rotation (<i>p</i> < 0.01), suggesting increased ROM demands shaped by Japanese eating customs.</p><p><strong>Discussion: </strong>These reference ROMs offer objective targets for seated-ADL rehabilitation and assistive-device design. validation in older adults and clinical populations is warranted to confirm applicability and guide goal setting.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1646326"},"PeriodicalIF":2.6,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12425972/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145064277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From recruitment to enrollment: understanding student-athletes' college choice decisions.","authors":"Anas Al-Fattal, Eddie G Walker Ii, Anita M Gust","doi":"10.3389/fspor.2025.1652581","DOIUrl":"10.3389/fspor.2025.1652581","url":null,"abstract":"<p><strong>Introduction: </strong>This study investigates the factors influencing student-athletes' college choice in the context of a shifting intercollegiate athletic landscape. While existing research has focused heavily on NCAA Division I athletes, limited attention has been paid to how student-athletes at Division II institutions navigate their enrollment decisions. Drawing on Means-End Theory and Social Exchange Theory, particularly the framework established by Czekanski and Barnhill (2015), this study explores how institutional attributes, athletic opportunities, financial considerations, and socio-emotional dynamics intersect in shaping college decision-making.</p><p><strong>Methods: </strong>Using a qualitative focus group approach, data were collected from 33 student-athletes at a small Midwestern university. Participants shared their experiences, motivations, and reflections on what mattered most in their college selection process.</p><p><strong>Results: </strong>Seven key themes emerged: athletic program quality, financial assistance, location and campus, social aspects and support systems, academic and athletic balance, long-term career goals, and diversity and inclusion. Findings reveal that while athletic and financial factors were important, relational and academic dimensions were also central. Name, Image, and Likeness (NIL) opportunities and athletic realignment were acknowledged but not prioritized.</p><p><strong>Discussion: </strong>The study contributes to a broader understanding of college choice by highlighting how student athletes interpret value through both traditional and evolving lenses. Implications are discussed for athletic recruiters, university administrators, and policymakers aiming to support student-athlete enrollment in a competitive and dynamic environment.</p>","PeriodicalId":12716,"journal":{"name":"Frontiers in Sports and Active Living","volume":"7 ","pages":"1652581"},"PeriodicalIF":2.6,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12426053/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145064303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}