{"title":"Optimizing serve strategies in tennis: A focus on Nash equilibrium and different court surfaces.","authors":"Rouli Ye, Wenming Liu","doi":"10.1080/02640414.2025.2502891","DOIUrl":"10.1080/02640414.2025.2502891","url":null,"abstract":"<p><p>This study analyzes 120 men's singles tennis matches using the Stroke Performance Relevance (SPR) metric and Nash equilibrium from game theory, focusing on serve strategies across different court surfaces. The SPR metric quantifies the impact of each stroke on match dynamics, providing a comprehensive alternative to traditional outcome-based metrics. Results show that on hard courts, first serves to the outside placement achieve the highest expected return (27.3), while on clay courts, the outside has the highest probability distribution (22.1%). For second serves, hard courts favor the inside with the highest expected return (2.3), whereas grass courts demonstrate the highest probability in the outside (6.0%). These findings underscore the critical need to adapt serve strategies to court-specific characteristics, enabling players to maximize strategic efficiency. Coaches can utilize these insights to develop targeted training programs. By integrating the SPR metric and Nash equilibrium, this study combines stroke impact quantification through SPR with game-theoretic strategy optimization. This integration enables players to dynamically adapt serve strategies during matches and empowers coaches to design surface-specific training regimens, thereby enhancing competitive performance through data-driven tactical adjustments.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1417-1424"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143970748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Are coordinative abilities impaired during adolescence in academy soccer?","authors":"Ryan J Hemmings, Sean J Maloney","doi":"10.1080/02640414.2025.2502897","DOIUrl":"10.1080/02640414.2025.2502897","url":null,"abstract":"<p><p>The current study sought to compare single leg (SL) landing and cutting mechanics within a cohort of youth footballers. A secondary aim was to examine how task complexity modulates the relationship between maturation and performance. Thirty-nine soccer players from an English football academy were categorised as pre-, circa- and post-peak height velocity (PHV). As part of routine club testing, players performed 1) bilateral and SL jumps (countermovement jump (CMJ) and 10/5 rebound jump tests), 2) speed (30-m sprint), and 3) change of direction (COD; 505 test and 45° cut) assessments. Landing (LESS score) and cutting mechanics (CMAS score) were determined during SL CMJ and 45° cuts, respectively. Differences in landing mechanics were not observed between groups. However, large effect sizes indicated that CMAS scores were lower in the post-PHV group versus pre- and circa-PHV groups, indicative of a favourable cutting technique. The circa-PHV group outperformed the pre-PHV group in the 'simpler' bilateral CMJ and linear sprint assessments, but not in the SL CMJ, 10/5 or COD assessments. The observed variability between participants in the circa-PHV period could be interpreted by changes in coordinative abilities. It is possible that athletes may require closer monitoring and possible training modification during this phase.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1452-1461"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144023983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Siu Ming Choi, Grant R Tomkinson, Justin J Lang, Cristina Cadenas-Sanchez, Haoyu Dong, Si Man Lei, Eric Tsz Chun Poon
{"title":"Handgrip strength has declined among people from Macao Special Administrative Region: A temporal trend analysis from 2001 to 2020.","authors":"Siu Ming Choi, Grant R Tomkinson, Justin J Lang, Cristina Cadenas-Sanchez, Haoyu Dong, Si Man Lei, Eric Tsz Chun Poon","doi":"10.1080/02640414.2025.2505384","DOIUrl":"10.1080/02640414.2025.2505384","url":null,"abstract":"<p><p>Handgrip strength is a robust measure of muscular strength and overall health. This study examined temporal trends in handgrip strength among individual aged 6 to 69 years in the Macao Special Administrative Region between 2001 and 2020. The population was stratified by age, and repeated cross-sectional data were obtained from a nationally representative sample of 41,685 participants across five survey years: 2001, 2005, 2010, 2015, and 2020. Temporal trends were analysed using general linear models, adjusted for sex, age, height, and weight, with distributional characteristics quantified using the coefficients of variation ratios. Over the 20-year period, handgrip strength declined significantly by 4.5 kg [effect size (ES) = -0.82)], with males (6.0 kg; ES = -0.91) experiencing a larger decline than females (2.2 kg; ES = -0.49). The greatest declines were observed in children (ES = -0.2), adolescents (ES = -0.55) and young adults (ES = -0.52). Middle-aged adults showed a small improvement (ES = 0.2), while older adults displayed no significant change. Distributional variability trends were negligible. These findings raise concerns about population health, as low handgrip strength is linked to chronic diseases and mortality. Continuous surveillance and interventions are essential to enhance muscular strength and public health.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1490-1498"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rui Zhao, Jie Ding, Ye Ji, Zhenqian Cheng, Yongjun Wang
{"title":"Associations of \"weekend warrior\" and other physical activity patterns with the risk of metabolic syndrome and its components: From NHANES 2007-2018.","authors":"Rui Zhao, Jie Ding, Ye Ji, Zhenqian Cheng, Yongjun Wang","doi":"10.1080/02640414.2025.2515757","DOIUrl":"10.1080/02640414.2025.2515757","url":null,"abstract":"<p><p> Physical activity is important for preventing metabolic syndrome (MetS), but the impact of the \"weekend warrior\" pattern-doing ≥150 minutes of moderate-to-vigorous physical activity in one or two sessions per week-remains uncertain. This study used data from the National Health and Nutrition Examination Survey (NHANES) involving 26,847 adults to examine associations between physical activity patterns (inactive, insufficiently active, regularly active, and \"weekend warrior\") and the risk of MetS and its components. Physical activity was assessed using the Global Physical Activity Questionnaire. Weighted logistic regression models evaluated these associations. Compared to inactive adults, regularly active participants (OR = 0.64, 95% CI: 0.57, 0.71), \"weekend warriors\" (OR = 0.72, 95% CI: 0.54, 0.98), and insufficiently active individuals (OR = 0.77, 95% CI: 0.69, 0.85) had significantly lower risks of MetS. All active groups also showed significantly reduced risks of abdominal obesity and hypertriglyceridemia compared to inactive individuals (<i>p</i> < 0.05). Additionally, the regularly and insufficiently active groups had lower risks of hyperglycemia and low high-density lipoprotein cholesterol. These results indicate that \"weekend warrior\" physical activity patterns can provide meaningful metabolic benefits, particularly for individuals who are unable to exercise regularly.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1606-1615"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144234438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K Kohake, L Henning, S Dahl, N Neuber, D Dreiskämper
{"title":"Associations between physical activity and health-related factors in childhood and adolescence during COVID-19 pandemic: A systematic review.","authors":"K Kohake, L Henning, S Dahl, N Neuber, D Dreiskämper","doi":"10.1080/02640414.2025.2508041","DOIUrl":"10.1080/02640414.2025.2508041","url":null,"abstract":"<p><p>Today, there is clear evidence that the restrictions of the COVID-19 pandemic influenced not only the physical activity (PA) behaviour of children and adolescents but also different health parameters. This study aimed at analysing the relationship between PA and health in children and adolescents during the COVID-19 pandemic. A systematic review in accordance with PRISMA was conducted. In April 2022, studies were searched for in nine electronic databases. Overall, 58 papers investigating more than 80,000 children and adolescents from 26 countries met full inclusion criteria. Studies examined the associations between PA and psychological health (<i>n</i> = 45), physical health (<i>n</i> = 13), social health (<i>n</i> = 12), general health (<i>n</i> = 1), and health-related habits (i.e. sleep, nutrition, screen time; <i>n</i> = 17). Most studies demonstrated strong evidence for relationships between PA and psychological health. Mostly positive correlations also emerged regarding the relation of PA and physical as well as social health. PA is also associated with other health-related behaviours, with screen time having an exceptional role during the pandemic. This review indicates that PA and health are associated largely even during the changed conditions of the COVID-19 pandemic. Future studies are needed that focus on the causality of these relationship between PA and health by including studies with longitudinal designs.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1499-1522"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144119928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carlos Sendra-Pérez, Alberto Encarnación-Martínez, Juan M Murias, Carlos De la Fuente, Rosario Salvador-Palmer, Fernando Martin-Rivera, Jose I Priego-Quesada
{"title":"Muscular excitation and oxygen extraction responses in power-generating and stabilizing muscles during a graded cycling test.","authors":"Carlos Sendra-Pérez, Alberto Encarnación-Martínez, Juan M Murias, Carlos De la Fuente, Rosario Salvador-Palmer, Fernando Martin-Rivera, Jose I Priego-Quesada","doi":"10.1080/02640414.2025.2518015","DOIUrl":"10.1080/02640414.2025.2518015","url":null,"abstract":"<p><p>Although some studies have shown an agreement between near-infrared spectroscopy (NIRS) and surface electromyography signals during dynamic exercise for a single muscle, research assessing multiple muscles with different roles is lacking. This would improve understanding of the connection between muscle excitation and muscle oxygen saturation (SmO<sub>2</sub>) profiles. Our study evaluated whether muscle excitation aligns with SmO2 during cycling in graded exercise testing. Fifteen cyclists and triathletes (age = 22 ± 6 years, stature = 175 ± 8 cm, training hours = 12 ± 4 hours·week<sup>-1</sup>) performed a graded exercise test on a cycle ergometer. NIRS and electromyography devices were placed on the preferred sides of the vastus lateralis, tibialis anterior, gastrocnemius medialis, and biceps femoris. Results showed that, in general, while average root mean square (RMS) increased, SmO<sub>2</sub> decreased (<i>p</i> < 0.05), except in the gastrocnemius medialis, which remained stable. Vastus lateralis and biceps femoris exhibited moderate signal agreement between RMS and SmO<sub>2</sub> (CCCLin: vastus lateralis = 0.70; biceps femoris = 0.50), while stabilizing muscles showed weak agreement (gastrocnemius medialis CCCLin = 0.32; tibialis anterior CCCLin = 0.39). In conclusion, power-generating and stabilizing muscles respond oppositely in SmO<sub>2</sub> and RMS during progressively increasing intensity exercise until exhaustion.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1675-1684"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From full to partials: Investigating the impact of range of motion training on maximum isometric action, and muscle hypertrophy in young women.","authors":"Gustavo Ferreira Pedrosa, Marina Gurgel Simões, Mariano Rezende Pereira, Brad Schoenfeld, Marcel Bahia Lanza, Fernando Vitor Lima, Arthur Brum Gonçalvez Bischoff, Mauro Heleno Chagas, Rodrigo César Ribeiro Diniz","doi":"10.1080/02640414.2025.2502895","DOIUrl":"10.1080/02640414.2025.2502895","url":null,"abstract":"<p><p>We compared maximum voluntary isometric action (MVIA), electromyographic (EMG) amplitude, and hypertrophy of rectus femoris (RF) and vastus lateralis (VL) between groups training in different ranges of motion (ROM). Fifty untrained women were randomised into control group (CON) or to perform knee extension exercise in one of the following groups (0°=extended knee): Full ROM (FULL<sub>ROM:</sub>100°-30°), Initial ROM (INITIAL<sub>ROM</sub>:100°-65°), Final ROM (FINAL<sub>ROM</sub>:65°-30°), and Varied ROM (VAR<sub>ROM</sub>: alternating between INITIAL<sub>ROM</sub> and FINALROM). Pre- and post-training assessments included MVIA at 30º, 65º and 100º of knee flexion, during which EMG amplitude of RF and VL was recorded. Summed changes in cross-sectional area, assessed via ultrasound, were measured at four locations along muscles. Results showed greater improvements in INITIAL<sub>ROM</sub> and VAR<sub>ROM</sub> for MVIA at 100º (20.63%-25.5%) and FINAL<sub>ROM</sub> and VAR<sub>ROM</sub> for MVIA at 30º (17.28%-17.97%) compared to other groups (-2.92%-9.83% and 0.84%-3.31%, respectively). EMG response was larger in INITIAL<sub>ROM</sub> than FINAL<sub>ROM</sub> and CON at 100º (15.84% vs -6.61%-1.16%). FINAL<sub>ROM</sub> had a higher EMG response than INITIAL<sub>ROM</sub> at 30º (4.52% vs -14.95%). For hypertrophy, INITIAL<sub>ROM</sub>, FULL<sub>ROM</sub>, and VAR<sub>ROM</sub> showed greatest increases (13.20%-17%). Greater MVIA gains aligned with trained ROM, leading to better VAR<sub>ROM</sub> results. INITIAL<sub>ROM</sub>, FULL<sub>ROM</sub>, and VAR<sub>ROM</sub> were more effective than FINALROM in hypertrophy.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1440-1451"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143989191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Josh Walker, Aaron Thomas, David E Lunn, Gareth Nicholson, Catherine B Tucker
{"title":"Concurrent validity of Theia3D markerless motion capture for detecting sagittal kinematic differences between gait speeds.","authors":"Josh Walker, Aaron Thomas, David E Lunn, Gareth Nicholson, Catherine B Tucker","doi":"10.1080/02640414.2025.2513151","DOIUrl":"10.1080/02640414.2025.2513151","url":null,"abstract":"<p><p>We do not yet understand the concurrent validity of markerless motion capture (MMC) to measure kinematic differences between multiple gait speeds. This study determined the capacity of Theia3D (Theia Markerless Inc.) MMC to detect sagittal-plane kinematic responses to different gait speeds during walking (3 and 5 km/h) and running (10 and 12 km/h). Fourteen participants ambulated on a motorised treadmill, while marker-based motion capture, through optoelectronic cameras (Oqus 7+, Qualisys AB), and MMC, through videos (Miqus, Qualisys AB) were synchronously collected. Sagittal-plane changes in pelvis, hip, knee, and ankle kinematics were compared. Mostly excellent waveform similarity was found for joint kinematic changes (coefficient of multiple determination [CMD] ≥ 0.87), but pelvic tilt was less similar (CMD ≤0.48). Agreement between outcome measures (joint minima and maxima, range of motion) was mostly good-to-excellent (intraclass correlation coefficient [ICC] = 0.475-0.950) with standard error of measurement values of less than 1°. Pelvis kinematics showed lower agreement between systems (ICC = 0.032-0.776). In this study, Theia3D detected changes in hip, knee, and ankle sagittal-plane joint kinematics between speeds with a similar accuracy to the marker-based approach. Therefore, Theia3D is appropriate for use if interested in lower-limb sagittal joint kinematics, but not pelvic tilt.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1560-1571"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144208768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nili Steinberg, Liav Elbaz, Dan Nemet, Alon Eliakim, Gali Dar
{"title":"Exploration of clinical diagnosis for tendinopathy, tendon structure, and muscle strength in young elite female gymnasts: A 12-month follow-up study.","authors":"Nili Steinberg, Liav Elbaz, Dan Nemet, Alon Eliakim, Gali Dar","doi":"10.1080/02640414.2025.2517543","DOIUrl":"10.1080/02640414.2025.2517543","url":null,"abstract":"<p><p>We aimed to examine the relationship between clinical diagnosis of tendinopathy, tendon structure, and muscle strength in 207 rhythmic, acrobatic and artistic elite female gymnasts over a period of 12 months (age 11.9 ± 1.8 years at baseline). Participants were assessed for patellar-tendon and Achilles-tendon structure, anthropometric parameters, and muscle strength, and were physically examined for clinical tendinopathy of the patella and the Achilles. At baseline, 26.6% and 31.4% of the gymnasts had clinical tendinopathy in the patellar or Achilles tendon, respectively. At follow-up, 37.2% and 38.6% remained <i>healthy</i>; 9.7% and 15.5% <i>recovered;</i> 36.2% and 30.0% <i>developed</i> clinical tendinopathy; and 16.9% and 15.9% <i>remained</i> with clinical tendinopathy, respectively. The <i>healthy</i> and <i>recovered</i> groups exhibited decreased prevalence of disorganised patellar tendon and Achilles tendon fibres from baseline to follow-up, while those who sustained or had developed tendinopathy showed increased prevalence (<i>p</i> < 0.05). A high prevalence of clinical tendinopathy was observed among adolescent female gymnasts, with a limited chance of recovery. At baseline, gymnasts without tendinopathy exhibited higher muscle strength and lower prevalence of disorganised tendon fibres than gymnasts with tendinopathy. At follow-up, recovered gymnasts exhibited higher muscle strength and lower prevalence of disorganised tendon fibres than those who had sustained or developed tendinopathy.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1641-1653"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From simple beeps to complex sounds: Custom-designed sounds improve shuttle run test performance and perceived enjoyment.","authors":"Sascha Ketelhut, Valentin Benzing, Daniel Hug","doi":"10.1080/02640414.2025.2502898","DOIUrl":"10.1080/02640414.2025.2502898","url":null,"abstract":"<p><p>This study evaluated whether custom-designed sounds enhance participants' performance and improve affective responses during the 20-meter shuttle run test (SRT) when compared to the traditional beep sound. Twenty-three individuals (24.8 ± 4.5 years) completed three SRTs on separate test days in a randomised, counterbalanced order. During the SRTs, participants were guided either by the traditional beep sound (stimulus A) or by two different customised sounds (stimuli B, and C). The total distance covered, peak heart rate, perceived exertion, attentional focus, and enjoyment were compared between the SRTs. A significant main effect was observed for the total distance covered during the SRT (<i>p</i> = .004), with greater distances covered during stimulus B compared to stimulus A (<i>p</i> = .001). A main effect was found for peak heart rate (<i>p</i> = .012), with higher heart rates observed for stimulus B than for stimulus A (<i>p</i> = .032). No significant effect was found for rating of perceived exertion (<i>p</i> = .665). For attentional focus, a main effect of condition emerged (<i>p</i> = .023) without significant differences between stimuli. Perceived enjoyment showed a main effect (<i>p</i> < .001), with greater enjoyment for stimulus B than A (<i>p</i> = .002) and C than A (<i>p</i> = .010). Custom-designed sounds enhanced performance, effort investment, and enjoyment, potentially improving SRT validity and perceptions of exercise testing.</p>","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1462-1470"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144026516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}