Psychology of Sport and Exercise最新文献

{"title":"The “three-point shooting paradox”: An artifact or a real phenomenon? Replication with large-scale National Basketball Association (NBA) data","authors":"Elia Morgulev","doi":"10.1016/j.psychsport.2024.102759","DOIUrl":"10.1016/j.psychsport.2024.102759","url":null,"abstract":"<div><div>Psychological science is often being criticized for failing to reproduce some of its findings. Considering this critique, Iso-Ahola (2024) argues that it is important to establish a demarcation line between artifact and a real phenomenon, recognizing that psychological phenomena are not constant particles that can be definitively declared to exist or not exist upon discovery. In this brief paper, we utilize newly available large-scale data to replicate a finding by Lidor et al. (2022), who reported a psychological effect wherein professional basketball players shoot better under tight defensive pressure rather than free of it. The current analysis of 781,663 three-point shots over 11 seasons in NBA (as compared to 382 shots taken by 12 players during 12 games in the original study) failed to support the idea of the three-point shooting paradox but instead strongly supports the commonsense hypothesis that tight defense hinders shooting performance.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102759"},"PeriodicalIF":3.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142383083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differences in motivational dynamics between experienced cyclists and untrained participants during an incremental endurance exercise task","authors":"Izzy. G. Wellings,&nbsp;Richard Ferguson,&nbsp;Ian M. Taylor","doi":"10.1016/j.psychsport.2024.102753","DOIUrl":"10.1016/j.psychsport.2024.102753","url":null,"abstract":"<div><h3>Purpose</h3><div>The conflict between the desire to reduce effort during exercise and the performance goal of the exercise task contributes to explaining endurance exercise performance. However, whether the trajectories of these two motivational responses systematically differ across individuals with different characteristics is poorly understood. The present study examined whether changes in desire to reduce effort and performance goal value across moderate, heavy, and severe exercise intensity domains differed between cyclists and untrained, but active participants.</div></div><div><h3>Methods</h3><div>Fifty participants (14 cyclists and 36 untrained) completed an incremental step test on a cycle ergometer, in which work rate was increased by 25 W every 4 min until voluntary exhaustion. Desire to reduce effort, performance goal value, and blood lactate concentration (for determination of exercise intensity domains) were measured every 4 min and the data were analysed using multilevel modelling.</div></div><div><h3>Results</h3><div>Desire to reduce effort increased quicker for untrained participants in the moderate exercise intensity domain (<em>b</em> = 1.66, <em>p</em> &lt; .001) and across the whole trial (<em>b</em> = 1.64, <em>p</em> &lt; .001), compared to cyclists (<em>b</em> = .69, and <em>b</em> = 1.14, respectively, both <em>p</em> &lt; .001). Untrained participants reported similar performance goal value at the beginning of the trial (<em>b</em> = 16.02, <em>p</em> &lt; .001), compared to cyclists (<em>b</em> = 17.25, <em>p</em> &lt; .001). Beyond moderate intensities, the performance goal value decreased significantly for the untrained participants (<em>b</em> = −.70, <em>p</em> &lt; .001) but significantly increased for cyclists (<em>b</em> = .45, <em>p</em> = .01). This pattern was also observed when focusing solely on the severe intensity domain (cyclists: <em>b</em> = .90, <em>p</em> &lt; .001; untrained: <em>b</em> = −.84, <em>p</em> &lt; .001).</div></div><div><h3>Conclusion</h3><div>There are distinct differences in the desire to reduce effort and performance goal value between cyclists and untrained athletes. Identifying these systematic differences enhances the credibility of the desire-goal conflict framework in explaining endurance performance and provides insight into the type and timing of interventions that might be successful in improving performance.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102753"},"PeriodicalIF":3.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142383082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining football players' perceived social support across organizational levels and its links to holistic talent development outcomes in German youth academies","authors":"Svenja Wachsmuth ,&nbsp;Luca-Lars Hauser ,&nbsp;Fee C. Gierens ,&nbsp;Svenja A. Wolf ,&nbsp;Hans-Dieter Hermann ,&nbsp;Oliver Höner","doi":"10.1016/j.psychsport.2024.102756","DOIUrl":"10.1016/j.psychsport.2024.102756","url":null,"abstract":"<div><div>Sport research highlights the significance of supportive relationships and a psychologically safe environment for promoting desirable talent development outcomes associated with young athletes' performance, wellbeing, and personal development. Against this background, this study aimed to investigate youth football players' perceived availability of different kinds of social support from various stakeholders along the talent pathway in German elite youth academies (1). It further sought to examine the link of such social support perceptions to wellbeing, sport commitment and individual performance satisfaction as relevant development outcomes (2). Finally, the study examined potential mechanism underlying these associations by considering psychological safety as a potential mediator (3). For this purpose, <em>N</em> = 271 youth academy players participating in teams of under-13s, under-15s, and under-17/19s age groups completed a multi-section online survey including the PASS-Q, PsySafety-Check, and WHO-5 as well as subscales of the ASQ (i.e., individual performance satisfaction) and YSCS (i.e., sport commitment). Multivariate analyses indicated significant differences in players' perceptions of social support depending on its kind and provider as well as on players' age group. Further, path models highlighted the importance of emotional and esteem support provided by coaches and management for players' talent development outcomes. However, psychological safety seemed to only play a minor role within those associations, partially mediating the effects of emotional support. Overall, these findings encourage a critical reflection of youth players' social support needs and opportunities to optimally address those within elite youth academies as prominent talent development environments in football.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102756"},"PeriodicalIF":3.1,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142378750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Brain endurance training improves sedentary older adults’ cognitive and physical performance when fresh and fatigued","authors":"Jesús Díaz-García ,&nbsp;Tomás García-Calvo ,&nbsp;Christopher Ring","doi":"10.1016/j.psychsport.2024.102757","DOIUrl":"10.1016/j.psychsport.2024.102757","url":null,"abstract":"<div><h3>Objectives</h3><div>Cognitive and physical performance is impaired by aging and fatigue. Cognitive and exercise training may mitigate such impairments. Accordingly, we investigated the effect of Brain Endurance Training (BET) – combined cognitive and exercise training – on cognitive and physical performance when fresh and fatigued in older adults.</div></div><div><h3>Design</h3><div>Twenty-four healthy sedentary women (65–78 years) were randomly allocated to one of three training groups: BET, exercise training, and control (no training). The BET and exercise training groups completed the same physical training protocol comprising three 45-min exercise sessions (20-min resistance exercise plus 25-min endurance exercise) per week for eight weeks. The BET group completed a 20-min cognitive task prior to exercise tasks. Cognitive (tasks: psychomotor vigilance, Stroop) and physical (tests: walk, chair-stand, arm curl) performance was tested when fresh and fatigued (before and after a 30-min cognitive task) at weeks 0 (pre-test), 4 (mid-test), 8 (post-test), and 12 (follow-up test).</div></div><div><h3>Results</h3><div>Cognitive and physical and performance was generally superior when fresh and fatigued at mid-test and post-test for both BET and exercise training groups compared to the control group. The BET group outperformed the exercise group when fatigued at mid-test and post-test both cognitively (always) and physically (sometimes). The pre-to-post changes in cognitive performance when fresh and fatigued averaged 3.7 % and 7.8 % for BET, 3.6 % and 4.5 % for exercise, and −0.4 % and 0.3 % for control groups. The corresponding changes in physical performance averaged 16.5 % and 29.9 % for BET, 13.8 % and 22.4 % for exercise, and 10.8 % and 7.1 % for control groups.</div></div><div><h3>Conclusion</h3><div>These findings show that BET can improve cognitive and physical performance in older adults.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102757"},"PeriodicalIF":3.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142373953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Move more today, sleep better tonight? Daily associations between physical activity and sedentary behavior with sleep among young adults with and without insomnia symptoms","authors":"Kaixin Liang ,&nbsp;Flora Le ,&nbsp;Peilian Chi ,&nbsp;Sitong Chen ,&nbsp;Liuyue Huang ,&nbsp;Xinli Chi","doi":"10.1016/j.psychsport.2024.102758","DOIUrl":"10.1016/j.psychsport.2024.102758","url":null,"abstract":"<div><h3>Objective</h3><div>At the between-person level, it is well-documented that individuals with more physical activity (PA) and less sedentary behavior (SB) tend to have better sleep outcomes than their peers. However, the associations at the within-person level remain unclear. This study investigated the daily associations between PA and SB with nighttime sleep among young adults with and without insomnia symptoms.</div></div><div><h3>Methods</h3><div>Data was collected through activity trackers and online questionnaires for 7 consecutive days among 147 university students, including time spent on moderate to vigorous physical activity (MVPA), light physical activity (LPA), and SB, along with sleep duration, sleep efficiency, and sleep quality. Participants were classified into two subgroups according to the presence of insomnia symptoms, which were determined by a self-reported insomnia scale. Multilevel compositional data analysis was conducted on the total sample, and separately on subsamples characterized by the presence and absence of insomnia symptoms.</div></div><div><h3>Results</h3><div>In the total sample and subsample without insomnia symptoms, substitutions among MVPA, LPA, and SB were not associated with changes in sleep outcomes at the daily level. However, in the subsample with insomnia symptoms, days with more MVPA or SB and less LPA were associated with higher sleep efficiency, while days with more LPA at the expense of MVPA or SB were associated with lower sleep efficiency.</div></div><div><h3>Conclusions</h3><div>For young adults with insomnia symptoms, replacing LPA with MVPA on a given day may improve their sleep efficiency that night.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102758"},"PeriodicalIF":3.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142373954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physical activity intensity and older adolescents’ stress: The ‘STress-Reactivity after Exercise in Senior Secondary EDucation’ (STRESSED) 3-arm randomised controlled trial","authors":"Jordan J. Smith ,&nbsp;Mark R. Beauchamp ,&nbsp;Eli Puterman ,&nbsp;Angus A. Leahy ,&nbsp;Sarah R. Valkenborghs ,&nbsp;Levi Wade ,&nbsp;Frances Chen ,&nbsp;David R. Lubans","doi":"10.1016/j.psychsport.2024.102754","DOIUrl":"10.1016/j.psychsport.2024.102754","url":null,"abstract":"<div><h3>Objectives</h3><div>Late adolescence (15–19 years) is a period of heightened susceptibility to stress, but regular physical activity may attenuate reactivity to stressors. We aimed to explore the effects of physical activity intensity on older adolescents’ stress-reactivity and self-reported mental health.</div></div><div><h3>Design and Methods</h3><div>Three-arm randomised controlled trial in New South Wales, Australia (April–June 2021). Thirty-seven older adolescents (16.1 ± 0.2 years, 59.5 % female) were randomised to: i) non-active control (CON), ii) light-intensity physical activity (LPA), or iii) moderate-to-vigorous-intensity physical activity (MVPA). Physical activity groups participated in 2 x 20-min sessions/week for 6 weeks. Salivary cortisol (sCort) reactivity to induced stress was assessed using the Trier Social Stress Test for Groups and quantified as area under the curve (sCort_AUC; Primary outcome). Secondary outcomes included peak cortisol (sCort_Peak), subjective-reactivity, perceived stress, and non-specific psychological distress. Group differences were assessed using multiple linear regression and quantified using Cohen’s <em>d</em>.</div></div><div><h3>Results</h3><div>No statistically significant effects were observed for sCort_AUC or sCort_Peak and the pattern of effects for subjective-reactivity was inconsistent. Effects for self-reported mental health were also non-significant (p &gt; .05 for all) but of meaningful magnitude, favouring LPA and MVPA over CON (<em>d’</em>s = −0.38 to −0.54). Delivery fidelity was high, satisfaction was moderate-to-high, and there was no evidence of harm. However, recruitment, retention for sCort measures, and adherence were lower than expected.</div></div><div><h3>Conclusion</h3><div>Suboptimal recruitment, retention, and adherence limited our ability to conclude on the effect of physical activity intensity on older adolescents’ sCort-reactivity to induced stress. We observed potentially meaningful effects on self-reported mental health for both physical activity conditions, which could be confirmed in a future powered trial.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102754"},"PeriodicalIF":3.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142373955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling relationship dynamics in sports teams: A primer on the social relations model","authors":"Tom Loeys ,&nbsp;Tom De Clerck ,&nbsp;Leen Haerens","doi":"10.1016/j.psychsport.2024.102752","DOIUrl":"10.1016/j.psychsport.2024.102752","url":null,"abstract":"<div><div>Interpersonal behavior in sports teams are inherently intricate. The Social Relations Model (SRM) presents a compelling framework to conceptualize and dissect these complexities, enabling the empirical testing of theories concerning relationships within group settings. The SRM decomposes dyadic measurements obtained from a round-robin design into components at the individual (actor and partner) level, relationship level, and team level. Leveraging data on need satisfaction, as experienced by the coach, team captain and two other athletes in relation to each other across 96 sports teams, we showcase the application of the SRM. A step-by-step introduction to the implementation of the model in R is provided. We elucidate how the SRM facilitates the investigation of research questions that deepen our understanding of team dynamics. Our illustration reveals that while the team effect exhibits minimal explanatory power over variability, substantial variability in need satisfaction is accounted for by both individual factors (actor and partner) and relationship effects. Notably, considerable differences are observed between sports teams in the extent to which coaches elicited need satisfaction in their team members. On average, coaches elicit lower levels of need satisfaction compared to other team members. Reciprocal relationships are evident in the team captain-athlete dyad and the athlete-athlete dyad, but not in dyadic relationships with the coach. In sum, this tutorial illustrates how analyzing dyadic data from a round-robin design using the SRM can enhance our understanding of dyadic relationship data within sports teams.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102752"},"PeriodicalIF":3.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How affective and instrumental physical activity outcomes are associated with motivation, intentions, and engagement in subsequent behavior","authors":"Celina R. Furman ,&nbsp;Alexander J. Rothman ,&nbsp;Traci Mann","doi":"10.1016/j.psychsport.2024.102751","DOIUrl":"10.1016/j.psychsport.2024.102751","url":null,"abstract":"<div><div>Physical activity (PA) produces various outcomes, including affective responses and instrumental benefits (e.g., weight loss, health). Theories of behavioral maintenance suggest that decisions to continue PA engagement will depend on one’s satisfaction with received outcomes. Thus, this study was designed to test how different combinations of affective and instrumental outcomes influence motivation, intentions, and subsequent PA behavior over a two-week study period. Participants with weight loss goals (<em>N</em> = 119) were provided an exercise video that was designed to manipulate their affect while exercising (positive vs. neutral) and their beliefs about the video’s instrumentality for weight loss (instrumental vs. not). Self-report measures assessed participants’ affect while exercising, instrumental beliefs that the video would produce weight loss, and motivation and intention to exercise with the video for two weeks. After two weeks, participants reported their video use. Because initial pre-registered analyses revealed that the video manipulation did not produce a difference in affect, a regression-based approach was implemented to examine whether variability in self-reported affect while exercising and beliefs about the video’s effect on weight loss predicted motivation, intentions, and video use during the two-week study period. Reports of more favorable affect were positively associated with motivation and video use, regardless of instrumental beliefs. For those reporting less favorable affect, strong instrumental beliefs appeared to bolster motivation, but had an adverse effect on video use. Findings provide insight into how different types of PA outcomes might influence motivation and continued behavioral engagement.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102751"},"PeriodicalIF":3.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Affective experiences from exercise. Youth-adult differences and prediction of exercise behavior","authors":"Ralf Brand ,&nbsp;Gorden Sudeck ,&nbsp;Panteleimon Ekkekakis","doi":"10.1016/j.psychsport.2024.102755","DOIUrl":"10.1016/j.psychsport.2024.102755","url":null,"abstract":"<div><div>Affective exercise experiences are summative, valenced memories that represent the history of associations between past instances of exercise in an individual's life and pleasant or unpleasant reactions. We used the recently developed Affective Exercise Experiences (AFFEXX) questionnaire to address two important questions in exercise psychology, namely the nature of affective exercise experiences during the childhood-adulthood transition and the relationship between affect and exercise behavior. The first study compared data from 949 adults and 607 children and adolescents, and showed that core affective exercise experiences were associated with different antecedent appraisals in the two groups. Being watched during exercise and perceptions of competence appeared to influence core affective experiences more in children and adolescents than in adults. The second study, using data from a subsample of 94 adults, showed that exercise behavior over 14 days can be predicted by pleasant core affective exercise experiences when they are congruent with strong attraction to exercise. These data highlight the value of theoretically informed research to understand the multifarious affective experiences individuals derive from exercise.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102755"},"PeriodicalIF":3.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A registered report with a single blind procedure to examine the effect of attentional focus and imagery dominance on dart throwing","authors":"Masahiro Yamada ,&nbsp;Esmaeel Saemi ,&nbsp;Shadi Delfi ,&nbsp;Sana Afrash","doi":"10.1016/j.psychsport.2024.102745","DOIUrl":"10.1016/j.psychsport.2024.102745","url":null,"abstract":"<div><div>External focus of attention (EFOA) has been shown to improve motor performance relative to internal focus of attention (IFOA). Recently, studies have shown that this attentional focus effect may depend upon an individual difference (<em>i.e.</em>, motor imagery): Those with a higher ability to visualize movements benefited more from EFOA, and those with a higher ability to feel movements benefited more from IFOA. However, inconsistent findings exist, potentially due to underpowered studies with various potential biases. Thus, leveraging a registered report and single-blind procedure, we will examine the effect of EFOA and IFOA on dart-throwing performance and how the attentional focus could be altered based on individuals’ imagery dominance. Participants will complete a dart-throw task with EFOA and IFOA. Then, participants will complete practice trials with no attentional focus, which will be followed by another set of performance trials with EFOA and IFOA. This study will examine whether the effect of attentional focus instruction will persist in a single-blind study and explore its effect on imagery dominance.</div></div>","PeriodicalId":54536,"journal":{"name":"Psychology of Sport and Exercise","volume":"76 ","pages":"Article 102745"},"PeriodicalIF":3.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}