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[PMID]: 29432458 [Au] Autor: Chang SC [Ad] Endereço: Holistic Education Center, Mackay Medical College, New Taipei City, Taiwan. [Ti] Título: Capability and opportunity in hot shooting performance: Evidence from top-scoring NBA leaders. [So] Source: PLoS One;13(2):e0179154, 2018. [Is] ISSN: 1932-6203 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: In basketball games, whenever players successfully shoot in streaks, they are expected to demonstrate heightened performance for a stretch of time. Streak shooting in basketball has been debated for more than three decades, but most studies have provided little significant statistical evidence and have labeled random subjective judgments the "hot hand fallacy." To obtain a broader perspective of the hot hand phenomenon and its accompanying influences on the court, this study uses field goal records and optical tracking data from the official NBA database for the entire 2015-2016 season to analyze top-scoring leaders' shooting performances. We first reflect on the meaning of "hot hand" and the "Matthew effect" in actual basketball competition. Second, this study employs statistical models to integrate three different shooting perspectives (field goal percentage, points scored, and attempts). This study's findings shed new light not only on the existence or nonexistence of streaks, but on the roles of capability and opportunity in NBA hot shooting. Furthermore, we show how hot shooting performances resulting from capability and opportunity lead to actual differences for teams. [Mh] Termos MeSH primário: Desempenho Atlético Basquetebol [Mh] Termos MeSH secundário: Seres Humanos [Pt] Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180309 [Lr] Data última revisão: 180309 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180213 [St] Status: MEDLINE [do] DOI: 10.1371/journal.pone.0179154

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[PMID]: 29431926 [Au] Autor: Kalaev VN; Nechaeva MS [Ti] Título: [The study of the frequency of buccal epithelium cells with nuclear in athletes in dependence on the place got in the competition]. [So] Source: Gig Sanit;95(10):992-7, 2016. [Is] ISSN: 0016-9900 [Cp] País de publicação: Russia (Federation) [La] Idioma: rus [Ab] Resumo: Cytogenetic homeostasis ofathletes involved in hand-to-hand armyfighting, depending on the outcome of the fight and the level of aggressiveness has been studied. Status of the genetic apparatus in athletes was evaluated in buccal epithelium with the use of micronucleus test, which is widely usedfor the determination of the influence of various factors on the genetic stability of the organism. Psychological testing of athletes was executed with the use of Spielberger's State-Trait Anger Expression Inventory scale, Bass-Darky questionnaire for the diagnostics of aggression and hostile reactions, Eysenck Personality Questionnaire test for the evaluation ofpsychic conditions and method of U.P. Ilyin and P.A. Kovalev for the identification of the propensity to conflictness and aggressiveness (positive and negative) as the personal characteristics. The place taken by the athlete on the competition was shown to have an impact on the frequency of buccal epithelium cells with nuclear abnormalities (micronuclei, perinuclear vacuoles, notches, protrusions "tongue" and "broken egg"). Losers have nuclear aberrations more than winners. At that in athletes with higher aggressiveness and its attendant psychological characteristics the influence of the outcome of the competition on the number of cells with aberrations core is more pronounced. [Mh] Termos MeSH primário: Agressão Desempenho Atlético Artes Marciais Testes para Micronúcleos/métodos Mucosa Bucal/patologia [Mh] Termos MeSH secundário: Adolescente Agressão/fisiologia Agressão/psicologia Atletas/psicologia Desempenho Atlético/fisiologia Desempenho Atlético/psicologia Análise Citogenética/métodos Seres Humanos Masculino Artes Marciais/fisiologia Artes Marciais/psicologia Testes Psicológicos Estatística como Assunto [Pt] Tipo de publicação: JOURNAL ARTICLE [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180309 [Lr] Data última revisão: 180309 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180213 [St] Status: MEDLINE

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[PMID]: 29278029 [Au] Autor: Jemili H; Mejri MA; Bouhlel E; Amri M [Ad] Endereço: 1 Research Unit of Functional Neurophysiology and Pathology, Biology Department, Faculty of Sciences Tunis, University of Tunis El Manar , Tunis, Tunisia. [Ti] Título: Biochemical status, oxidative and antioxidant responses after 3-month specific training in elite karate athletes. [So] Source: Physiol Int;104(4):344-354, 2017 Dec 01. [Is] ISSN: 2498-602X [Cp] País de publicação: Hungary [La] Idioma: eng [Ab] Resumo: Aim To investigate the effects of 3-month-long specific training program on biochemical status, oxidative and antioxidant responses in elite karatekas. Methods Twenty male karatekas [BMI: 21.9 ± 2.4 (kg/m )] participated in this study. They performed a 3-month specific training to prepare for an international competition. We measured selected biochemical parameters, the oxidative and antioxidant responses before (T0) and after 3 months of intense karate training (T1). Results We found significant increases in catalase activity (26.3% ± 21.3%, p < 0.0005), superoxide dismutase activity (15.9% ± 28.8%, p < 0.05), and a significant decrease in malondialdehyde levels (17.2% ± 13.7%, p < 0.0005) after 3 months of karate training. Moreover, the athletes' biochemical status was significantly improved at T1 compared with T0 (for the majority of parameters, p < 0.0005). Conclusions The specific training program improves the prooxidant-antioxidant balance of elite karate athletes. It could be recommended for athletes having similar physical fitness level. [Mh] Termos MeSH primário: Antioxidantes/metabolismo Desempenho Atlético/fisiologia Artes Marciais/fisiologia Estresse Oxidativo/fisiologia Condicionamento Físico Humano/métodos Resistência Física/fisiologia Espécies Reativas de Oxigênio/sangue [Mh] Termos MeSH secundário: Seres Humanos Masculino Consumo de Oxigênio/fisiologia Adulto Jovem [Pt] Tipo de publicação: CLINICAL TRIAL; JOURNAL ARTICLE [Nm] Nome de substância: 0 (Antioxidants); 0 (Reactive Oxygen Species) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180309 [Lr] Data última revisão: 180309 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171227 [St] Status: MEDLINE [do] DOI: 10.1556/2060.104.2017.4.5

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[PMID]: 29278026 [Au] Autor: Tokodi M; Csábi E; Kiricsi Á; Kollár E; Molnár AH; Rovó L; Bella Z [Ad] Endereço: 1 Department of Oto-Rhino-Laryngology and Head-Neck Surgery, University of Szeged , Szeged, Hungary. [Ti] Título: The effect of nasal provocation with a single-dose allergen on the physical and cognitive performance of patients with ragweed allergy. [So] Source: Physiol Int;104(4):334-343, 2017 Dec 01. [Is] ISSN: 2498-602X [Cp] País de publicação: Hungary [La] Idioma: eng [Ab] Resumo: Purpose This study aims to compare the impact of active allergic rhinitis on physical and cognitive abilities of trained allergic athletes to untrained allergic patients. Methods Cognitive, respiratory, and fitness functions were assessed before and after allergen exposure. Participants in both groups were provoked intranasally with ragweed allergen. Results The group of athletes revealed significantly higher average values in peak inspiratory flow and fitness index before and after provocation. In neuropsychological assessments, athletes performed significantly better after allergen provocation in complex working memory capacity. Due to single acute allergen exposure, the size of the nasal cavity and nasal inspiratory peak flow significantly decreased in both groups. The physical performance of both groups did not change after provocation. Executive functions and complex working memory capacity of athletes significantly improved resulting from provocation. Conclusions A single-shot allergen in high dose might cause an increase in mental concentration, which was more pronounced in the group of athletes. This study indicates that acute exposure to allergen cannot affect the physical performance and may result in increased mental focus in patients with allergy notwithstanding the declining respiratory functions. [Mh] Termos MeSH primário: Alérgenos/administração & dosagem Antígenos de Plantas/administração & dosagem Desempenho Atlético Cognição/efeitos dos fármacos Testes de Provocação Nasal/métodos Extratos Vegetais/administração & dosagem Desempenho Psicomotor/efeitos dos fármacos Rinite Alérgica/fisiopatologia [Mh] Termos MeSH secundário: Adulto Relação Dose-Resposta a Droga Esquema de Medicação Feminino Seres Humanos Masculino Rinite Alérgica/diagnóstico [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: 0 (Allergens); 0 (Antigens, Plant); 0 (Plant Extracts); 0 (ragweed pollen) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180309 [Lr] Data última revisão: 180309 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 171227 [St] Status: MEDLINE [do] DOI: 10.1556/2060.104.2017.4.6

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[PMID]: 29296106 [Au] Autor: Seifert JG; Brumet A; St Cyr JA [Ad] Endereço: Movement Science Laboratory, Montana State University, Bozeman, MT USA. [Ti] Título: The influence of D-ribose ingestion and fitness level on performance and recovery. [So] Source: J Int Soc Sports Nutr;14:47, 2017. [Is] ISSN: 1550-2783 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Background: Skeletal muscle adenosine triphosphate (ATP) levels are severely depleted during and following prolonged high intensity exercise. Recovery from these lower ATP levels can take days, which can affect performance on subsequent days of exercise. Untrained individuals often suffer the stress and consequences of acute, repeated bouts of exercise by not having the ability to perform or recovery sufficiently to exercise on subsequent days. Conversely, trained individuals may be able to recover more quickly due to their enhanced metabolic systems. D-Ribose (DR) has been shown to enhance the recovery in ATP; however, it is not known if recovery and performance can be benefitted with DR ingestion. Therefore, this study was designed to determine what influence DR might have on muscular performance, recovery, and metabolism during and following a multi-day exercise regimen. Methods: The study was a double blind, crossover study in 26 healthy subjects compared 10 g/day of DR to 10 g/day of dextrose (DEX, control). All subjects completed 2 days of loading with either DR or DEX, followed by 3 additional days of supplementation and during these 3 days of supplementation, each subject underwent 60 min of high intensity interval exercise in separate daily sessions, which involved cycling (8 min of exercise at 60% and 2 min at 80% VO max), followed by a 2 min power output (PO) test. Subjects were divided into two groups based on peak VO results, lower VO (LVO ) and higher peak VO (HVO ). Results: Mean and peak PO increased significantly from day 1 to day 3 for the DR trial compared to DEX in the LVO group. Rate of perceived exertion (RPE) and creatine kinase (CK) were significantly lower for DR than DEX in the LVO group. No differences in PO, RPE, heart rate, CK, blood urea nitrogen, or glucose were found between either supplement for the HVO group. Conclusion: DR supplementation in the lower VO max group resulted in maintenance in exercise performance, as well as lower levels of RPE and CK. Unlike no observed benefits with DEX supplementation. [Mh] Termos MeSH primário: Trifosfato de Adenosina/metabolismo Limiar Anaeróbio/efeitos dos fármacos Desempenho Atlético/fisiologia Suplementos Nutricionais Músculo Esquelético/efeitos dos fármacos Músculo Esquelético/metabolismo Aptidão Física/fisiologia Ribose/farmacologia [Mh] Termos MeSH secundário: Adulto Limiar Anaeróbio/fisiologia Estudos Cross-Over Método Duplo-Cego Metabolismo Energético/efeitos dos fármacos Feminino Seres Humanos Masculino Fenômenos Fisiológicos da Nutrição Esportiva [Pt] Tipo de publicação: CLINICAL TRIAL; COMPARATIVE STUDY; JOURNAL ARTICLE [Nm] Nome de substância: 681HV46001 (Ribose); 8L70Q75FXE (Adenosine Triphosphate) [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180308 [Lr] Data última revisão: 180308 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180104 [St] Status: MEDLINE [do] DOI: 10.1186/s12970-017-0205-8

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[PMID]: 28421914 [Au] Autor: Wattie N; Schorer J; Baker J [Ad] Endereço: a Faculty of Health Sciences , University of Ontario Institute of Technology , Oshawa , Canada. [Ti] Título: Seeing the forest but not the trees: Heterogeneity in community size effects in Canadian ice hockey players. [So] Source: J Sports Sci;36(4):436-444, 2018 Feb. [Is] ISSN: 1466-447X [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: The community size effect (or birthplace effect) suggests that high-performance athletes are less likely to emerge from regions with population sizes that are very small or very large. However, previous research on elite Canadian ice hockey players has not considered the influence of intra-national regional variation of population distributions with respect to community size effects. Therefore, the purpose of the current study was to test the heterogeneity of the community size effect between Canadian National Hockey League draftees (2000-2014: n = 1505), from 7 provincial regions within Canada (i.e., British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec and the Atlantic Provinces). The proportion of athletes in the 9 census population categories were compared to the national and regional general population distributions in the census categories. Results suggest variability of community size effects between the 7 provincial regions within Canada, with only the province of Ontario demonstrating a community size effect congruent with effects reported in previous research. Using regional general population distributions as the comparator to athlete populations changed the direction, meaningfulness and magnitude of community size effects. In conclusion, elite ice hockey player community size effects may not be generalisable to all regions within Canada. [Mh] Termos MeSH primário: Aptidão Hóquei Densidade Demográfica Distribuição Espacial da População [Mh] Termos MeSH secundário: Desempenho Atlético Canadá/epidemiologia Seres Humanos [Pt] Tipo de publicação: JOURNAL ARTICLE [Em] Mês de entrada: 1803 [Cu] Atualização por classe: 180302 [Lr] Data última revisão: 180302 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170420 [St] Status: MEDLINE [do] DOI: 10.1080/02640414.2017.1313444

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[PMID]: 29352279 [Au] Autor: Keenan KG; Senefeld JW; Hunter SK [Ad] Endereço: Department of Kinesiology University of Wisconsin-Milwaukee, WI, United States of America. [Ti] Título: Girls in the boat: Sex differences in rowing performance and participation. [So] Source: PLoS One;13(1):e0191504, 2018. [Is] ISSN: 1932-6203 [Cp] País de publicação: United States [La] Idioma: eng [Ab] Resumo: Men outperform women in many athletic endeavors due to physiological and anatomical differences (e.g. larger and faster muscle); however, the observed sex differences in elite athletic performance are typically larger than expected, and may reflect sex-related differences in opportunity or incentives. As collegiate rowing in the United States has been largely incentivized for women over the last 20 years, but not men, the purpose of this study was to examine sex differences in elite rowing performance over that timeframe. Finishing times from grand finale races for collegiate championship on-water performances (n = 480) and junior indoor performances (n = 1,280) were compared between men and women across 20 years (1997-2016), weight classes (heavy vs. lightweight) and finishing place. Participation of the numbers of men and women rowers were also quantified across years. Men were faster than women across all finishing places, weight classes and years of competition and performance declined across finishing place for both men and women (P<0.001). Interestingly, the reduction in performance time across finishing place was greater (P<0.001) for collegiate men compared to women in the heavyweight division. This result is opposite to other sports (e.g. running and swimming), and to lightweight rowing in this study, which provides women fewer incentives than in heavyweight rowing. Correspondingly, participation in collegiate rowing has increased by ~113 women per year (P<0.001), with no change (P = 0.899) for collegiate men. These results indicate that increased participation and incentives within collegiate rowing for women vs. men contribute to sex differences in athletic performance. [Mh] Termos MeSH primário: Desempenho Atlético/fisiologia Caracteres Sexuais Esportes Aquáticos/fisiologia [Mh] Termos MeSH secundário: Adolescente Desempenho Atlético/psicologia Desempenho Atlético/tendências Peso Corporal Comportamento Competitivo/fisiologia Características Culturais Feminino Seres Humanos Masculino Modelos Biológicos Modelos Psicológicos Fatores Sociológicos Esportes Aquáticos/psicologia Esportes Aquáticos/tendências Adulto Jovem [Pt] Tipo de publicação: JOURNAL ARTICLE [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180226 [Lr] Data última revisão: 180226 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 180121 [St] Status: MEDLINE [do] DOI: 10.1371/journal.pone.0191504

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[PMID]: 28287028 [Au] Autor: Gløersen Ø; Myklebust H; Hallén J; Federolf P [Ad] Endereço: a Department of Physics , University of Oslo , Oslo , Norway. [Ti] Título: Technique analysis in elite athletes using principal component analysis. [So] Source: J Sports Sci;36(2):229-237, 2018 Jan. [Is] ISSN: 1466-447X [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: The aim of this study was to advance current movement analysis methodology to enable a technique analysis in sports facilitating (1) concurrent comparison of the techniques between several athletes; (2) identification of potentially beneficial technique modifications and (3) a visual representation of the findings for feedback to the athletes. Six elite cross-country skiers, three world cup winners and three national elite, roller ski skated using the V2 technique on a treadmill while their movement patterns were recorded using 41 reflective markers. A principal component analysis performed on the marker positions resulted in multi-segmental "principal" movement components (PMs). A novel normalisation facilitated comparability of the PMs between athletes. Additionally, centre of mass (COM) trajectories were modelled. We found correlations between the athletes' performance levels (judged from race points) and specific features in the PMs and in the COM trajectories. Plausible links between COM trajectories and PMs were observed, suggesting that better performing skiers exhibited a different, possibly more efficient use of their body mass for propulsion. The analysis presented in the current study revealed specific technique features that appeared to relate to the skiers' performance levels. How changing these features would affect an individual athlete's technique was visualised with animated stick figures. [Mh] Termos MeSH primário: Desempenho Atlético/fisiologia Análise de Componente Principal Esqui/fisiologia [Mh] Termos MeSH secundário: Adulto Teste de Esforço Seres Humanos Masculino Movimento/fisiologia Postura/fisiologia Estudos de Tempo e Movimento [Pt] Tipo de publicação: JOURNAL ARTICLE [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180226 [Lr] Data última revisão: 180226 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170314 [St] Status: MEDLINE [do] DOI: 10.1080/02640414.2017.1298826

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[PMID]: 28282754 [Au] Autor: Gabbett TJ; Hulin BT [Ad] Endereço: a Gabbett Performance Solutions , Brisbane , Australia. [Ti] Título: Activity and recovery cycles and skill involvements of successful and unsuccessful elite rugby league teams: A longitudinal analysis of evolutionary changes in National Rugby League match-play. [So] Source: J Sports Sci;36(2):180-190, 2018 Jan. [Is] ISSN: 1466-447X [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: We investigated changes in activity and recovery cycles and skill involvements: (1) during National Rugby league (NRL) match-play from 2004 to 2014 and (2) among successful and unsuccessful teams over the same period. Teams were divided into 4 tiers according to final ladder position: (A) 1st-4th, (B) 5th-8th, (C) 9th-12th and (D) 13th-16th. Total, mean and maximum ball-in-play time decreased, while recovery time increased from 2004 to 2014. Offensive and defensive skill involvements changed differentially over time with moderate to large reductions in the number of play-the-balls, offloads and missed tackles, and moderate to large increases in the number of passes, tackles made and ineffective tackles. The gap between Tier A and Tier D decreased for mean activity time and the proportion of short (<45 s) ball-in-play periods. Conversely, the gap between Tier A and Tier D increased for skill involvements, with Tier A completing more play-the-balls, and Tier D performing a greater number of offloads, and total, missed and ineffective tackles. Our results demonstrate the decreasing ball-in-play demands of NRL competition over 11 seasons. However, our data also highlight the narrowing gap in ball-in-play demands, and increasing gap in skill involvements between the top tier and bottom tier teams. [Mh] Termos MeSH primário: Desempenho Atlético/fisiologia Comportamento Competitivo/fisiologia Futebol Americano/fisiologia Destreza Motora/fisiologia [Mh] Termos MeSH secundário: Seres Humanos Estudos Longitudinais Estudos Prospectivos Estudos de Tempo e Movimento [Pt] Tipo de publicação: JOURNAL ARTICLE [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180226 [Lr] Data última revisão: 180226 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170312 [St] Status: MEDLINE [do] DOI: 10.1080/02640414.2017.1288918

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[PMID]: 28282750 [Au] Autor: Jones MJ; Peeling P; Dawson B; Halson S; Miller J; Dunican I; Clarke M; Goodman C; Eastwood P [Ad] Endereço: a Department of Sport Science, Exercise and Health, School of Human Sciences , The University of Western Australia , Crawley , WA , Australia. [Ti] Título: Evening electronic device use: The effects on alertness, sleep and next-day physical performance in athletes. [So] Source: J Sports Sci;36(2):162-170, 2018 Jan. [Is] ISSN: 1466-447X [Cp] País de publicação: England [La] Idioma: eng [Ab] Resumo: The aim of the present study was to investigate the influence of different types of tasks performed with or without an electronic device (tablet) on pre-sleep alertness, subsequent sleep quality and next-day athletic performance. Eight highly trained netball players attended a sleep laboratory for pre-sleep testing, polysomnographic sleep monitoring and next-day physical performance testing on 5 separate occasions (1 familiarisation and 4 experimental sessions). For 2 h prior to bedtime, athletes completed cognitively stimulating tasks (puzzles) or passive tasks (reading) with or without a tablet. Sleepiness tended to be greater after reading compared to completing puzzles without a tablet (d = 0.80), but not with a tablet. Melatonin concentration increased more so after reading compared to completing puzzles on a tablet (P = 0.02). There were no significant differences in sleep quality or quantity or next-day athletic performance between any of the conditions. These data suggest that using a tablet for 2 h prior to sleep does not negatively affect subsequent sleep or next-day performance in athletes. [Mh] Termos MeSH primário: Desempenho Atlético Atenção Microcomputadores/utilização Sono [Mh] Termos MeSH secundário: Adolescente Temperatura Corporal Orelha Média/fisiologia Feminino Seres Humanos Hidrocortisona/metabolismo Melatonina/metabolismo Salvia/metabolismo Análise e Desempenho de Tarefas [Pt] Tipo de publicação: JOURNAL ARTICLE [Nm] Nome de substância: JL5DK93RCL (Melatonin); WI4X0X7BPJ (Hydrocortisone) [Em] Mês de entrada: 1802 [Cu] Atualização por classe: 180226 [Lr] Data última revisão: 180226 [Sb] Subgrupo de revista: IM [Da] Data de entrada para processamento: 170312 [St] Status: MEDLINE [do] DOI: 10.1080/02640414.2017.1287936

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