Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 6.397
Filtrar
1.
MMWR Morb Mortal Wkly Rep ; 70(4): 130-135, 2021 Jan 29.
Artigo em Inglês | MEDLINE | ID: mdl-33507889

RESUMO

The National Football League (NFL) and the NFL Players Association (NFLPA) began the 2020 football season in July, implementing extensive mitigation and surveillance measures in facilities and during travel and gameplay. Mitigation protocols* were evaluated and modified based on data from routine reverse transcription-polymerase chain reaction (RT-PCR) tests for SARS-CoV-2, the virus that causes coronavirus 2019 (COVID-19); proximity tracking devices; and detailed interviews. Midseason, transmission was observed in persons who had cumulative interactions of <15 minutes' duration, leading to a revised definition of high-risk contacts that required consideration of mask use, setting and room ventilation in addition to proximity and duration of interaction. The NFL also developed an intensive protocol that imposed stricter infection prevention precautions when a case was identified at an NFL club. The intensive protocol effectively prevented the occurrence of high-risk interactions, with no high-risk contacts identified for 71% of traced cases at clubs under the intensive protocol. The incorporation of the nature and location of the interaction, including mask use, indoor versus outdoor setting, and ventilation, in addition to proximity and duration, likely improved identification of exposed persons at higher risk for SARS-CoV-2 infection. Quarantine of these persons, along with testing and intensive protocols, can reduce spread of infection.


Assuntos
/prevenção & controle , Busca de Comunicante , Futebol Americano , /epidemiologia , Humanos , Máscaras/estatística & dados numéricos , Quarentena/estatística & dados numéricos , Medição de Risco , Fatores de Tempo , Estados Unidos/epidemiologia , Ventilação/estatística & dados numéricos
2.
Artigo em Inglês | MEDLINE | ID: mdl-33445452

RESUMO

The coronavirus disease (COVID-19) pandemic in 2020 resulted in widespread interruption of team sports training and competitions. Our aim was to review the recommendations and best practices in return to play in non-professional football after activity lockdown. The authors searched two electronic databases (PubMed, Web of Science) to extract studies published before September 15 2020. Twenty studies explained recommendations, considerations, or best practices in return to play in football, and all of them were clustered into three groups: (1) training load management (n = 10), (2) medical recommendations (n = 9), and (3) recovery related issues (n = 5). The way to establish a progression in training process should be based on training load management and managing the number of stimuli per time. Following the studies, this training process should be divided into three phases: phase 1-physical distancing should be maintained; phases 2 and 3-group training should start. Medical considerations were clustered into different groups: general, pre- and post- training, during training, education, planning to return to competition, and suggestions for post confinement weeks. In particular, social issues, strict hygiene questions, and continuous PCR testing should be considered in return to play over football season. Finally, since a correlation has been found between high-intensive training loads and immunoglobulin A, nutritional and lifestyle recovery strategies should be performed. Moreover, since immunosuppression has been related to congested schedules (<72 h between matches), football federations should avoid this situation.


Assuntos
/diagnóstico , Futebol Americano/estatística & dados numéricos , Volta ao Esporte , Segurança , Futebol/estatística & dados numéricos , /epidemiologia , Controle de Doenças Transmissíveis , Alemanha/epidemiologia , Humanos , Masculino , Guias de Prática Clínica como Assunto , Avaliação de Sintomas/métodos
3.
Clin Sports Med ; 40(1): 1-18, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33187601

RESUMO

Sport-related concussions are common in the United States. Concussion rates have increased over time, likely due to improved recognition and awareness. Concussion rates vary across level (high school vs college), sex, and sport. Concussion rates are the highest among men, particularly in football, wrestling, ice hockey, and lacrosse where collisions and contact are inherent to the sports, although girls'/women's soccer rates are high. In gender-comparable sports, women have higher concussion rates. Continued data collection will increase understanding of sport-related concussion and provide areas for targeted prevention in the future.


Assuntos
Traumatismos em Atletas/epidemiologia , Concussão Encefálica/epidemiologia , Distribuição por Idade , Feminino , Futebol Americano/lesões , Hóquei/lesões , Humanos , Incidência , Masculino , Esportes com Raquete/lesões , Distribuição por Sexo , Futebol/lesões , Estados Unidos/epidemiologia , Universidades , Luta Romana/lesões
4.
Sports Health ; 13(1): 18-24, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32716762

RESUMO

BACKGROUND: Current research on concussion incidence in youth athletes (age <18 years) is small and limited by variability in injury reporting and diagnostic methodology. HYPOTHESIS: Concussion injuries commonly occur in high school sports programs. The likelihood of concussion among student-athletes (aged 13-18 years) depends on the sport they are participating in as well as the sex of the athlete. STUDY DESIGN: Descriptive epidemiology study. LEVEL OF EVIDENCE: Level 4. METHODS: A retrospective analysis of all Hawaii high school athletes aged 13 to 18 years participating in 14 sports from 2011 through 2017 was performed as part of a statewide standardized concussion assessment and management program. RESULTS: A total of 5993 concussions were identified among 92,966 athletes. The overall concussion rate was 0.96 (95% CI, 0.94-0.99). Girls' judo had the highest concussion rate (1.92; 95% CI, 1.68-2.17) followed by football (1.60; 95% CI, 1.53-1.66). The concussion rate for boys (1.0; 95% CI, 0.97-1.03) was higher than that for girls (0.91; 95% CI, 0.87-0.95); however, in 4 of the 5 sports in which both girls and boys participated, girls had a higher rate of concussion injury. CONCLUSION: The likelihood of concussion among student-athletes aged 13 to 18 years may be higher than previously thought and varies depending on sport and sex. CLINICAL RELEVANCE: Epidemiologic data on concussion injury in children and adolescents are useful in accurately determining the relative risks of high school sports participation and may be valuable in determining the appropriate allocation of health care and scholastic resources for student-athletes, as well as the impact of rule and training modifications designed to improve participant safety.


Assuntos
Concussão Encefálica/epidemiologia , Esportes Juvenis/lesões , Adolescente , Feminino , Futebol Americano/lesões , Hawaii/epidemiologia , Humanos , Incidência , Masculino , Artes Marciais/lesões , Estudos Retrospectivos , Instituições Acadêmicas , Distribuição por Sexo , Futebol/lesões
5.
PLoS One ; 15(12): e0243044, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33326430

RESUMO

Researchers in the social sciences have increasingly studied how emotions influence decision-making. We argue that research on emotions arising naturally in real-world environments is critical for the generalizability of insights in this domain, and therefore to the development of this field. Given this, we argue for the increased use of the "quasi-field experiment" methodology, in which participants make decisions or complete tasks after as-if-random real-world events determine their emotional state. We begin by providing the first critical review of this emerging literature, which shows that real-world events provide emotional shocks that are at least as strong as what can ethically be induced under laboratory conditions. However, we also find that most previous quasi-field experiment studies use statistical techniques that may result in biased estimates. We propose a more statistically-robust approach, and illustrate it using an experiment on negative emotion and risk-taking, in which sports fans completed risk-elicitation tasks immediately after watching a series of NFL games. Overall, we argue that when appropriate statistical methods are used, the quasi-field experiment methodology represents a powerful approach for studying the impact of emotion on decision-making.


Assuntos
Tomada de Decisões , Emoções , Algoritmos , Futebol Americano , Humanos , Modelos Estatísticos , Ciências Sociais
6.
Clin Dermatol ; 38(6): 788-792, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33341218

RESUMO

Epidemiologic studies suggest that individuals with tattoos are more extroverted, aggressive, and more likely to take risks than individuals with no tattoos. Whether these personality traits affect athletic performance is uncertain. We compared behavioral patterns and rates of success of football players at the International Federation of Association Football (FIFA) World Cup 2018 by tattoo status. In this cross-sectional study, 32.7% of football players had visible tattoos (241 of 736), mostly on their arms (97.1%). Footballers with tattoos played longer on average (208 versus 160 minutes; P < .001), received more cards (.38 versus .27; P < .001), and committed more fouls per player (2.64 versus 2.2; P < .001). Players with tattoos attempted more shots at goal (P = .016), but without higher goal success (P = .204). The higher number of disciplinary events (being whistled for fouls and given yellow or red cards) and longer playing time of football players with tattoos may reflect personality traits reported in nonathletic individuals with tattoos, such as dominance, extroversion, aggressiveness, and willingness to take risks.


Assuntos
Atletas/psicologia , Desempenho Atlético , Futebol Americano , Tatuagem/psicologia , Tatuagem/estatística & dados numéricos , Adulto , Agressão , Estudos Transversais , Humanos , Masculino , Personalidade , Assunção de Riscos , Adulto Jovem
7.
JAMA Netw Open ; 3(12): e2031509, 2020 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-33372973

RESUMO

Importance: Despite increased concern about the health consequences of contact sports, little is known about athletes' understanding of their own risk of sports-related injury. Objective: To assess whether college football players accurately estimate their risk of concussion and nonconcussion injury and to identify characteristics of athletes who misestimate their injury risk. Design, Setting, and Participants: In this survey study, questionnaires were given to 296 current college football players on 4 teams from the 3 of the 5 most competitive conferences of the US National Collegiate Athletic Association. Surveys were conducted between February and May 2017. Data were analyzed from June 2017 through July 2020. Main Outcomes and Measures: Multiple approaches were taken to compare athlete perceptions of their risks of concussion and nonconcussion injury with individual probabilities of these risks, which were modeled using logistic regression. Results: Of 296 male college-aged athletes from 4 football teams who participated in the survey, 265 (89%) answered all questions relevant for this study. Participating teams were similar to nonparticipating teams across nearly all measured characteristics. One hundred athletes (34%) had sustained 1 or more concussions, and 197 (68% of the 289 who responded to the question) had sustained 1 or more injuries in the previous football season. Logistic regression models of single-season injury and concussion had reasonably good fit (area under the curve, 0.75 and 0.73, respectively). Of the 265 participants for whom all relevant data were available, 111 (42%) underestimated their risk of concussion (χ2 = 98.6; P = .003). A similar proportion of athletes (113 [43%]) underestimated their risk of injury, although this was not statistically significant (χ2 = 34.0; P = .09). An alternative analytic strategy suggested that 241 athletes (91%) underestimated their risk of injury (Wilcoxon statistic, 7865; P < .001) and 167 (63%) underestimated their risk of concussion (Wilcoxon statistic, 26 768; P < .001). Conclusions and Relevance: The findings of this survey study suggest that college football players may underestimate their risk of injury and concussion. The implications for informed participation in sport are unclear given that people generally underestimate health risks. It is necessary to consider whether athletes are sufficiently informed and how much risk is acceptable for an athlete to participate in a sport.


Assuntos
Atletas/estatística & dados numéricos , Concussão Encefálica/epidemiologia , Autoavaliação Diagnóstica , Futebol Americano/lesões , Estudantes/estatística & dados numéricos , Adolescente , Atletas/psicologia , Concussão Encefálica/etiologia , Futebol Americano/psicologia , Humanos , Modelos Logísticos , Masculino , Medição de Risco/métodos , Estudantes/psicologia , Inquéritos e Questionários , Estados Unidos/epidemiologia , Universidades , Adulto Jovem
8.
BMJ Case Rep ; 13(12)2020 Dec 12.
Artigo em Inglês | MEDLINE | ID: mdl-33310827

RESUMO

A 14-year-old boy was injured from playing football, and subsequently developed worsening abdominal pain. CT of the abdomen and pelvis was concerning for a mass of ascending colon, with free fluid in the pelvis. The patient was emergently taken to the operating room where he was found to have a cecal haematoma. The patient underwent a right hemicolectomy and ileocolostomy and was discharged home just days later without any acute complications. As cecal haematomas are a rare entity, the best approach to management is not well defined. When the diagnosis is uncertain, or if the possibility of full-thickness injury exists, exploratory laparoscopy or laparotomy is the safest approach.


Assuntos
Doenças do Ceco/cirurgia , Futebol Americano/lesões , Hematoma/cirurgia , Dor Abdominal/cirurgia , Adolescente , Doenças do Ceco/diagnóstico por imagem , Doenças do Ceco/etiologia , Colectomia , Hematoma/diagnóstico por imagem , Hematoma/etiologia , Humanos , Ileostomia , Masculino , Tomografia Computadorizada por Raios X , Resultado do Tratamento
9.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 4624-4627, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019024

RESUMO

The Sports Concussion Assessment Tool (SCAT) is a pen and paper-based evaluation tool for use by healthcare professionals in the acute evaluation of suspected concussion. Here we present a feasibility study towards instrumented SCAT (iSCAT). Traditionally, a healthcare professional subjectively counts errors according to SCAT marking criteria matrix. It is hypothesized that an instrumented version of the test will be more accurate while providing additional digital-based parameters to better inform player management. The feasibility study focuses on the SCAT physical functioning tasks only: double leg stance, single-leg stance, tandem stance and tandem gait. Amateur university rugby players underwent iSCAT testing and data were recorded with 8 inertial units attached at different anatomical locations. Video data were gathered simultaneously as reference. An iSCAT algorithm was used to detect errors and quantify additional concussion-based time and frequency domain parameters to assess participant stability during balance and gait tasks. Future work aims to instrument other SCAT features such as hand-eye coordination while deploying methods within a large concussion project.


Assuntos
Traumatismos em Atletas , Concussão Encefálica , Futebol Americano , Atletas , Traumatismos em Atletas/diagnóstico , Concussão Encefálica/diagnóstico , Estudos de Viabilidade , Humanos
10.
Cogn Behav Neurol ; 33(3): 208-217, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32889953

RESUMO

BACKGROUND: Traumatic brain injury (TBI) is a known risk factor for neurodegenerative dementias such as Alzheimer disease (AD); however, the potential risk of mild cases of TBI, such as concussions, remains unclear. OBJECTIVE: To explore whether a small sample of retired professional athletes with a diagnosis of mild cognitive impairment (MCI)-the prodromal stage of AD-and a history of multiple mild TBIs exhibit greater neuropsychological impairment than age-matched nonathletes with MCI and no history of TBI. METHOD: Ten retired National Football League players diagnosed with MCI and reporting multiple mild TBIs, and 10 nonathletes, also diagnosed with MCI but with no history of TBI, completed a standard neurologic examination and neuropsychological testing. Independent samples t tests were conducted to examine differences in neuropsychological performance between the two groups. RESULTS: The retired athletes with a history of mild TBI obtained generally similar scores to the nonathlete controls on measures of verbal learning and memory, verbal fluency, and processing speed. However, the retired athletes scored lower than the controls on tests of confrontation naming and speeded visual attention. CONCLUSION: Retired athletes with MCI and a history of mild TBI demonstrated similar neuropsychological profiles as nonathlete controls despite lower scores on measures of confrontation naming and speeded visual attention. These findings suggest that a history of multiple mild TBIs does not significantly alter the overall neuropsychological profile of individuals with MCI; confirmation of this will require longitudinal research with larger sample sizes.


Assuntos
Concussão Encefálica/complicações , Lesões Encefálicas Traumáticas/complicações , Disfunção Cognitiva/etiologia , Futebol Americano/lesões , Testes Neuropsicológicos/normas , Aposentadoria/psicologia , Idoso , Idoso de 80 Anos ou mais , Atletas/psicologia , Feminino , Futebol Americano/psicologia , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto
11.
PLoS One ; 15(8): e0236643, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32841239

RESUMO

Accelerometry is a recent method used to quantify workload in team sports. A rapidly increasing number of studies supports the practical implementation of accelerometry monitoring to regulate and optimize training schemes. Therefore, the purposes of this study were: (1) to reflect the current state of knowledge about accelerometry as a method of workload monitoring in invasion team sports according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines, and (2) to conclude recommendations for application and scientific investigations. The Web of Science, PubMed and Scopus databases were searched for relevant published studies according to the following keywords: "accelerometry" or "accelerometer" or "microtechnology" or "inertial devices", and "load" or "workload", and "sport". Of the 1383 studies initially identified, 118 were selected for a full review. The main results indicate that the most frequent findings were (i) devices' body location: scapulae; (b) devices brand: Catapult Sports; (iii) variables: PlayerLoadTM and its variations; (iv) sports: rugby, Australian football, soccer and basketball; (v) sex: male; (vi) competition level: professional and elite; and (vii) context: separate training or competition. A great number of variables and devices from various companies make the comparability between findings difficult; unification is required. Although the most common location is at scapulae because of its optimal signal reception for time-motion analysis, new methods for multi-location skills and locomotion assessment without losing tracking accuracy should be developed.


Assuntos
Acelerometria , Desempenho Atlético , Basquetebol , Futebol Americano , Futebol , Carga de Trabalho , Feminino , Sistemas de Informação Geográfica , Humanos , Masculino , Microtecnologia
12.
PLoS One ; 15(8): e0237800, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32797073

RESUMO

USA Football established five levels-of-contact to guide the intensity of high school football practices. The objective of this study was to examine head impact frequency and magnitude by levels-of-contact to determine which drills had the greatest head impact exposure. Our primary hypothesis was that there would be an incremental increase in season-long head impact exposure between levels-of-contact: air100g) head impacts were more frequently observed during live and thud drills. Level-of-contact influences cumulative head impact frequency and magnitude in high-school football, with players incurring frequent, high magnitude head impacts during live, thud, and control. It is important to consider level-of-contact to refine clinical exposure guidelines to minimize head impact burden in high-school football.


Assuntos
Concussão Encefálica/etiologia , Traumatismos Craniocerebrais/etiologia , Futebol Americano , Cabeça/patologia , Adolescente , Concussão Encefálica/patologia , Traumatismos Craniocerebrais/patologia , Dispositivos de Proteção da Cabeça , Humanos , Masculino , Instituições Acadêmicas
13.
Wiad Lek ; 73(4): 755-760, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32731711

RESUMO

OBJECTIVE: The aim of the study is to specify diagnostic MRI and ultrasound criteria for a sports hernia in order to verify its diagnosis in football players. PATIENTS AND METHODS: Materials and methods: The study included 50 professional and amateur football players aged 15 to 34 from 2016 to 2019. The criteria for inclusion in the study were: the presence of groin pain in football players, which prevented them from continuing to actively participate in sports activities. RESULTS: Results: The findings of the study revealed that during MRI the two factors, which had the strongest influence, were "increased MR signal intensity on PDfs observed from the structures of the inguinal canal" and "increased MR signal intensity on PDfs observed from bone marrow of superior ramus of the pubic bone". During ultrasound of the inguinal area, the main criterion for a sports hernia diagnosis was "increased size of the inguinal canal". The verification of the diagnosis was carried out on the basis of the presence of a protrusion in the posterior wall of the inguinal canal. For a sports hernia diagnosis the MRI sensitivity is 91.67% (95% CI 77.5 - 98.2), specificity -78.57% (95% CI 49.2 - 95.3) and the sensitivity of ultrasound is 88.89% (95% CI 73.9 - 96.9), the specificity - 50% (95% CI 23.0 - 77). CONCLUSION: Conclusions: The combination of MRI and ultrasound makes it possible to accurately detect the presence of a sports hernia in the football player. Based on the findings of our study, we formulated MRI and ultrasound criteria for a sports hernia diagnosis.


Assuntos
Futebol Americano , Hérnia Inguinal , Adolescente , Adulto , Virilha , Hérnia , Humanos , Imagem por Ressonância Magnética , Adulto Jovem
14.
Artigo em Inglês | MEDLINE | ID: mdl-32751819

RESUMO

The Baron Depression Screener for Athletes (BDSA) is a brief, valid, and reliable athlete- specific assessment tool developed in the US to assess depressive symptoms in elite athletes. We examined the applicability and reliability of a Japanese version of the BDSA (BDSA-J) in a Japanese context, and further examined the construct validity of the BDSA-J. Web-based anonymous self-report data of 235 currently competing Japanese professional male rugby players (25-29 years = 123 [52.3%]) was analyzed. A two-stage process was conducted to validate the factor structure of the BDSA-J using exploratory factor analysis in a randomly partitioned calibration sample, and confirmatory factor analysis in a separate validation sample. Cronbach's alpha was used to assess internal consistency. Spearman's rank-order correlation coefficients were calculated to examine convergent validity with the Kessler-6. We identified a one-factor structure for BDSA-J. Confirmatory factor analysis supported this one-factor model, revealing good model fit indices. The standardized path coefficients for each of the items were ß = 0.52 to 0.79 (p < 0.001). A Cronbach's alpha of 0.71 was obtained for the BDSA-J. BDSA-J showed significant positive correlations with the Kessler-6. The BDSA-J is an appropriate and psychometrically robust measure for identifying depressive symptoms in Japanese male rugby players.


Assuntos
Atletas/psicologia , Depressão/diagnóstico , Futebol Americano , Inquéritos e Questionários/normas , Adulto , Humanos , Japão , Masculino , Programas de Rastreamento , Reprodutibilidade dos Testes
15.
Artigo em Inglês | MEDLINE | ID: mdl-32854203

RESUMO

Current methods for estimating heat vulnerability of young athletes use a heat index (HI) or a wet bulb globe thermometer (WBGT), neither of which fully include the environmental or physiological characteristics that can affect a person's heat budget, particularly where activity occurs on a synthetic surface. This study analyzed and compared the standard methods, HI and WBGT, with a novel and more comprehensive method termed COMFA-Kid (CK) which is based on an energy budget model explicitly designed for youth. The COMFA model was presented at the same time to demonstrate the difference between a child and an adult during activity. Micrometeorological measurements were taken at a synthetic-surfaced football field during mid-day in hot environmental conditions. Standard methods (HI and WBGT) indicated that conditions on the field were relatively safe for youth to engage in activities related to football practice or games, whereas the CK method indicated that conditions were dangerously hot and could lead to exertional heat illness. Estimates using the CK method also indicated that coaches and staff standing on the sidelines, and parents sitting in the stands, would not only be safe from heat but would be thermally comfortable. The difference in thermal comfort experienced by coaches and staff off the field, versus that experienced by young players on the field, could affect decision making regarding the duration and intensity of practices and time in the game. The CK method, which is easy to use and available for modification for specific conditions, would lead to more accurate estimates of heat safety on outdoor synthetic surfaces in particular, and in sports with a high prevalence of heat illness such as football, and should be considered as a complementary or alternative preventive measure against heat.


Assuntos
Atletas/psicologia , Futebol Americano , Transtornos de Estresse por Calor/prevenção & controle , Futebol , Adolescente , Adulto , Atletas/estatística & dados numéricos , Criança , Calor Extremo , Temperatura Alta , Humanos
16.
Rev. bras. ortop ; 55(4): 432-437, Jul.-Aug. 2020. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1138055

RESUMO

Abstract Objectives To analyze the results of anterior cruciate ligament (ACL) reconstruction with remnant-preserving versus remnant-resecting technique, concerning the return to pre-lesion activity level. Methods The present retrospective cohort study has assessed adults > 18 years old who underwent ACL anatomical reconstruction between 2010 and 2014. The main outcomes assessed were: level of physical activity (4-point scale), sports participation rate, ACL rerupture defined as documented lesion requiring revision surgery and the numeric pain scale rate (NPSR). Results A total of 83 individuals were included in the study, with a mean age of 31.8 years old and follow-up mean time of 4.2 years after the surgery. A total of 34 patients underwent ACL reconstruction with remnant-preserving technique, and 49 without remnant preservation. No statistically significant difference was found between groups in all outcomes assessed: level of physical activity before the lesion and after the surgery, ACL rerupture rates and postoperative pain level. Subgroup analysis has shown a statistically significant decrease in the activity level in both groups. The most practiced sport was football; 72% of patients in the remnant group have resumed football activity versus 52.6% of the control group. Conclusion Based in these findings, the comparison between ACL reconstruction with remnant preserving technique and remnant resecting technique has shown no differences concerning the return to prelesion activity level.


Resumo Objetivo Analisar os resultados da reconstrução do ligamento cruzado anterior (LCA) com preservação do remanescente, comparada à técnica convencional, no retorno do paciente ao nível de atividade física pré-lesão. Métodos Estudo transversal retrospectivo, que avaliou indivíduos adultos submetidos à reconstrução anatômica do LCA no período de 2010 a 2014. Os desfechos analisados foram: nível de atividade física, taxa retorno ao esporte, relesão do LCA definida como lesão documentada que necessite de nova reconstrução ligamentar, e dor pela escala numérica de dor (EVN). Resultados Foram incluídos 83 indivíduos com média de 31,8 anos de idade e seguimento médio de 4,2 anos após a cirurgia, 34 submetidos à reconstrução do LCA com preservação do remanescente, e 49 à convencional. Não houve diferença estatisticamente significativa entre os grupos na frequência de atividade física pré-lesão e pós-operatória, na taxa de relesão do LCA reconstruído e na intensidade da dor no pós-operatório. Na análise intragrupos, houve uma queda estatisticamente significativa na frequência da prática de atividade física pós-operatória para ambos os grupos em comparação ao nível pré-lesão. O tipo de esporte mais praticado foi o futebol, onde 72% pacientes do grupo remanescente retornaram ao esporte comparado a 52,6% do grupo controle; porém, essa diferença não foi estatisticamente significante. Conclusão Não foi possível observar diferenças entre os pacientes submetidos às técnicas cirúrgicas de reconstrução LCA com e sem a preservação do remanescente em relação ao retorno ao esporte, frequência de atividade física e intensidade da dor. Estudos futuros prospectivos são necessários.


Assuntos
Humanos , Masculino , Feminino , Dor , Dor Pós-Operatória , Ruptura , Esportes , Exercício Físico , Incidência , Reconstrução do Ligamento Cruzado Anterior , Volta ao Esporte , Lesões do Ligamento Cruzado Anterior , Futebol Americano
17.
AJNR Am J Neuroradiol ; 41(7): 1263-1268, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-32661051

RESUMO

BACKGROUND AND PURPOSE: SWI is an advanced imaging modality that is especially useful in cerebral microhemorrhage detection. Such microhemorrhages have been identified in adult contact sport athletes, and the sequelae of these focal bleeds are thought to contribute to neurodegeneration. The purpose of this study was to utilize SWI to determine whether the prevalence and incidence of microhemorrhages in adolescent football players are significantly greater than those of adolescent noncontact athletes. MATERIALS AND METHODS: Preseason and postseason SWI was performed and evaluated on 78 adolescent football players. SWI was also performed on 27 adolescent athletes who reported no contact sport history. Two separate one-tailed Fisher exact tests were performed to determine whether the prevalence and incidence of microhemorrhages in adolescent football players are greater than those of noncontact athlete controls. RESULTS: Microhemorrhages were observed in 12 football players. No microhemorrhages were observed in any controls. Adolescent football players demonstrated a significantly greater prevalence of microhemorrhages than adolescent noncontact controls (P = .02). Although 2 football players developed new microhemorrhages during the season, microhemorrhage incidence during 1 football season was not statistically greater in the football population than in noncontact control athletes (P = .55). CONCLUSIONS: Adolescent football players have a greater prevalence of microhemorrhages compared with adolescent athletes who have never engaged in contact sports. While microhemorrhage incidence during 1 season is not significantly greater in adolescent football players compared to adolescent controls, there is a temporal association between playing football and the appearance of new microhemorrhages.


Assuntos
Hemorragia Cerebral Traumática/diagnóstico por imagem , Hemorragia Cerebral Traumática/etiologia , Futebol Americano/lesões , Neuroimagem/métodos , Adolescente , Atletas , Humanos , Incidência , Imagem por Ressonância Magnética/métodos , Masculino , Prevalência
18.
Neurology ; 95(7): e781-e792, 2020 08 18.
Artigo em Inglês | MEDLINE | ID: mdl-32641518

RESUMO

OBJECTIVE: To study longitudinal recovery trajectories of white matter after sports-related concussion (SRC) by performing diffusion tensor imaging (DTI) on collegiate athletes who sustained SRC. METHODS: Collegiate athletes (n = 219, 82 concussed athletes, 68 contact-sport controls, and 69 non-contact-sport controls) were included from the Concussion Assessment, Research and Education Consortium. The participants completed clinical assessments and DTI at 4 time points: 24 to 48 hours after injury, asymptomatic state, 7 days after return-to-play, and 6 months after injury. Tract-based spatial statistics was used to investigate group differences in DTI metrics and to identify white-matter areas with persistent abnormalities. Generalized linear mixed models were used to study longitudinal changes and associations between outcome measures and DTI metrics. Cox proportional hazards model was used to study effects of white-matter abnormalities on recovery time. RESULTS: In the white matter of concussed athletes, DTI-derived mean diffusivity was significantly higher than in the controls at 24 to 48 hours after injury and beyond the point when the concussed athletes became asymptomatic. While the extent of affected white matter decreased over time, part of the corpus callosum had persistent group differences across all the time points. Furthermore, greater elevation of mean diffusivity at acute concussion was associated with worse clinical outcome measures (i.e., Brief Symptom Inventory scores and symptom severity scores) and prolonged recovery time. No significant differences in DTI metrics were observed between the contact-sport and non-contact-sport controls. CONCLUSIONS: Changes in white matter were evident after SRC at 6 months after injury but were not observed in contact-sport exposure. Furthermore, the persistent white-matter abnormalities were associated with clinical outcomes and delayed recovery time.


Assuntos
Traumatismos em Atletas/reabilitação , Concussão Encefálica/patologia , Imagem de Tensor de Difusão , Substância Branca/patologia , Adolescente , Adulto , Atletas , Traumatismos em Atletas/diagnóstico por imagem , Concussão Encefálica/diagnóstico , Concussão Encefálica/fisiopatologia , Corpo Caloso/patologia , Corpo Caloso/fisiopatologia , Imagem de Difusão por Ressonância Magnética/métodos , Imagem de Tensor de Difusão/métodos , Feminino , Futebol Americano/lesões , Humanos , Masculino , Substância Branca/fisiopatologia , Adulto Jovem
19.
Artigo em Inglês | MEDLINE | ID: mdl-32605081

RESUMO

The assessment of tactical-technical knowledge of football is essential to develop optimal and integral teaching processes for students. Therefore, the aim of this study was to design and validate an instrument so that teachers, coaches, and researchers can observe and codify both the tactical behaviors and technical skills performed by the students in the game of football. The design and validation of the instrument were carried out in four phases: a) review of the literature and previous instruments; b) design of the Instrument for the Measurement of Learning and Performance in Football (IMLPFoot). It assesses all the offensive and defensive play actions, with and without the ball, as well as their three components (decision-making, technical execution, and final result); c) sample selection of experts (N = 12); and d) quantitative (Likert-type scale from 1 to 10) and qualitative assessment of degree the pertinence, unambiguity, and importance of each of the 33 items included in the IMLPFoot. Aiken's V coefficient was used to determine content validity. Likewise, internal consistency was calculated using Cronbach's α coefficient. The results showed demanding levels of validity (V ≥ 0.77), internal consistency (α = 0.983), inter-rater, and intra-rater reliability. Therefore, it is a valid and reliable instrument that makes possible a complete assessment of football in physical education classes and/or in the sports context (out-of-school football).


Assuntos
Desempenho Atlético/normas , Futebol Americano , Futebol , Humanos , Aprendizagem , Reprodutibilidade dos Testes
20.
J Sports Sci ; 38(21): 2454-2461, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32701387

RESUMO

Understanding the locomotor characteristics of competition can help rugby league (RL) coaches optimise training prescription. To date, no research exists on the locomotor characteristics of women's RL. The aim was to compare whole match and peak locomotor characteristics of women's RL competition at international (RL World Cup [WRLWC]) and domestic level (Super League [WSL]). Microtechnology data were collected from 58 players from 3-WSL clubs and 1-WRLWC team. Participants were classified into forwards (n = 30) and backs (n = 28). Partial least squares correlation analysis established which variables were important to discriminate between the level of competition (international vs. domestic) and positional group (forwards vs. backs). Linear mixed-effects models estimated the differences between standards of competition and positional group for those variables. International forwards were most likely exposed to greater peak 1-min average acceleration (standardised mean difference = 1.23 [0.42 to 2.04]) and peak 3-min average acceleration (1.13 [0.41 to 1.85]) than domestic forwards. International backs likely completed greater peak 1-min average acceleration (0.83 [0.08 to 1.58]) than domestic backs and possibly greater high-speed-distances (0.45 [-0.17 to 1.07]). Findings highlight the need for positional specific training across levels to prepare representative players for the increased match characteristics of international competition.


Assuntos
Desempenho Atlético/fisiologia , Comportamento Competitivo/fisiologia , Futebol Americano/fisiologia , Locomoção/fisiologia , Acelerometria/instrumentação , Feminino , Humanos , Dispositivos Eletrônicos Vestíveis
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA