RESUMO
OBJECTIVES: To examine whether universal prevention via a digital health platform can reduce the injury incidence in athletics athletes aged 12-15 years and if club size had an influence on the effect of the intervention. METHODS: This was a cluster randomised trial where young athletics athletes were randomised through their club following stratification by club size into intervention (11 clubs; 56 athletes) and control (10 clubs; 79 athletes) groups. The primary endpoint was time from baseline to the first self-reported injury. Intervention group parents and coaches were given access to a website with health information adapted to adolescent athletes and were encouraged to log in and explore its content during 16 weeks. The control group continued training as normal. Training exposure and injury data were self-reported by youths/parents every second week, that is, eight times. The primary endpoint data were analysed using the log-rank test. Cox proportional hazards regression was used to analyse the second study aim with intervention status and club size included in the explanatory models. RESULTS: The proportion of completed training reports was 85% (n=382) in the intervention group and 86% (n=545) in the control group. The injury incidence was significantly lower (HR=0.62; χ2=3.865; p=0.049) in the intervention group. The median time to first injury was 16 weeks in the intervention group and 8 weeks in the control group. An interaction effect between the intervention and stratification factor was observed with a difference in injury risk between athletes in the large clubs in the intervention group versus their peers in the control group (HR 0.491 (95% CI 0.242 to 0.998); p=0.049). CONCLUSIONS: A protective effect against injury through universal access to health information adapted for adolescent athletes was observed in youth athletics athletes. The efficacy of the intervention was stronger in large clubs. TRIAL REGISTRATION NUMBER: NCT03459313.
Assuntos
Traumatismos em Atletas , Serviços de Saúde , Atletismo , Adolescente , Humanos , Atletas/estatística & dados numéricos , Traumatismos em Atletas/epidemiologia , Traumatismos em Atletas/prevenção & controle , Incidência , Organizações/estatística & dados numéricos , Atletismo/lesões , Atletismo/estatística & dados numéricos , Análise por Conglomerados , Criança , InternetRESUMO
International outdoor athletics championships are typically hosted during the summer season, frequently in hot and humid climatic conditions. Therefore, we analyzed the association between apparent temperature and heat-related illnesses occurrence during international outdoor athletics championships and compared its incidence rates between athletics disciplines. Heat-related illnesses were selected from illness data prospectively collected at seven international outdoor athletics championships between 2009 and 2018 using a standardized methodology. The Universal Thermal Climate Index (UTCI) was calculated as a measure of the apparent temperature based on weather data for each day of the championships. Heat-related illness numbers and (daily) incidence rates were calculated and analyzed in relation to the daily maximum UTCI temperature and between disciplines. During 50 championships days with UTCI temperatures between 15â and 37â, 132 heat-related illnesses were recorded. Average incidence rate of heat-related illnesses was 11.7 (95%CI 9.7 to 13.7) per 1000 registered athletes. The expected daily incidence rate of heat-related illnesses increased significantly with UTCI temperature (0.12 more illnesses per 1000 registered athletes/°C; 95%CI 0.08-0.16) and was found to double from 25 to 35°C UTCI. Race walkers (RR = 45.5, 95%CI 21.6-96.0) and marathon runners (RR = 47.7, 95%CI 23.0-98.8) had higher heat-related illness rates than athletes competing in short-duration disciplines. Higher UTCI temperatures were associated with more heat-related illnesses, with marathon and race walking athletes having higher risk than athletes competing in short-duration disciplines. Heat-related illness prevention strategies should predominantly focus on marathon and race walking events of outdoor athletics championships when high temperatures are forecast.
Assuntos
Transtornos de Estresse por Calor/epidemiologia , Temperatura Alta/efeitos adversos , Atletismo/estatística & dados numéricos , Estudos de Coortes , Feminino , Humanos , Incidência , Masculino , Estudos ProspectivosRESUMO
PURPOSE: This study aimed to determine how the speed-distance relationship, described by critical speed (CS) and distance prime (D'), is altered with aging. METHODS: Official race data from the past eight World Masters Athletics Indoor Track and Field World Championships were used for this study. CS and D' were calculated for female and male athletes (35-90 yr of age) who registered times for the 800-, 1500-, and 3000-m runs during a single championship to determine the relationship between age and CS and D'. Twenty-six athletes completed sufficient races in multiple championships to retrospectively assess the change in CS and D' over time. RESULTS: Cross-sectional data indicated that CS continuously decreases after age 35 yr in a curvilinear manner with advancing age (R2 = 0.73, P < 0.001, n = 187), with even greater decreases in CS occurring after ~70 yr of age. D' also changed in a curvilinear manner with age (R2 = 0.45, P < 0.001, n = 103), such that decreases were observed between 35 and 70 yr, followed by an increase in D' thereafter. Retrospective, longitudinal data, with an average follow-up of 6.38 ± 1.73 yr, support these findings, indicating that the annual decrease in CS grows with advancing age (e.g., ~1% vs ~3% annual decrease in CS at age 55 vs 80 yr, respectively) and that D' shifts from an annual decrease (e.g., ~2.5% annual decrease at 55 yr) to an annual increase (e.g., ~2.5% annual increase at 80 yr) around 70 yr of age. Importantly, the relationship between CS and race pace was unaffected by age, supporting the relevance of CS throughout aging. CONCLUSION: Even among world-class athletes, CS decreases and D' changes with aging. These adaptations may contribute to the diminished exercise ability associated with aging.
Assuntos
Envelhecimento/fisiologia , Atletas , Corrida/fisiologia , Atletismo/fisiologia , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Corrida/estatística & dados numéricos , Tempo , Atletismo/estatística & dados numéricosRESUMO
BACKGROUND: The top 10 athletes in the International Association of Athletic Federations in 100-m and 400-m ranking for each sex were assessed for their history of race times before achieving their personal record (PR). The main goal of this study was to create a new method for optimal performance improvement rate assessment for coaches and athletes aiming the World Record. METHODS: The difference between PR ('current' season) and the best race time in the last season was defined as the first season improvement rate (1-SIR), whereas the average improvement rate in the last and preceding seasons was the multi-season improvement rate (M-SIR). 1-SIR and M-SIR were calculated for each athlete. RESULTS: The sex comparison for the 100 m event showed a significant difference in the M-SIR in favor of women. No statistical differences were identified for the 400 m event, with a trivial effect in both 1-SIR and M-SIR. CONCLUSIONS: As a practical applicability, graph plots were designed to help verifying the improvement rate of athletes and to evaluate whether a long-term training strategy induced an acceptable performance improvement or whether some adjustments needed and check within the plots if the improvement rate is within the average of the top-10 athletes of their event.
Assuntos
Desempenho Atlético/fisiologia , Comportamento Competitivo/fisiologia , Corrida/fisiologia , Atletismo/fisiologia , Logro , Adulto , Desempenho Atlético/estatística & dados numéricos , Interpretação Estatística de Dados , Feminino , Humanos , Masculino , Condicionamento Físico Humano/estatística & dados numéricos , Corrida/estatística & dados numéricos , Fatores Sexuais , Atletismo/estatística & dados numéricos , Adulto JovemRESUMO
Caribbean nations stand to benefit significantly from the potential insights that can be gained from the assessment of their athlete talent development environments; which in turn can lead to the formulation of evidence-based strategies and improvements to their sport development pathways. The principal aim of this study was to examine the psychometric properties of the 25-item TDEQ-5 to determine its validity to assess the development environments of talented youth track and field athletes from six English-speaking Caribbean countries. As a secondary aim, we sought to examine athletes' perceptions of their talent development environment within this context. Confirmatory factor analysis revealed adequate model fit of a re-specified model and good overall internal reliability of the scale, therefore offering support for its use within this context. Furthermore, adequate construct validity and internal reliability was found within three subscales (i.e., communication, holistic quality preparation and support network) with subpar scores within two subscales (i.e., long-term development focus and alignment of expectations). Preliminary findings on athletes' perceptions of their environment revealed key strengths in coaches' long-term development focus and communication, however deficiencies were noted in the accessibility and availability of sport-related support and preparation of athletes. In conclusion, the re-specified TDEQ-5 with 25 items appears to be a reliable and valid measure within the Caribbean context. However, it is recommended that the scale be used with some caution with regard to the interpretation of results for the 'long-term development focus' and 'alignment of expectations' subscales.
Assuntos
Aptidão , Atletas/psicologia , Psicometria/métodos , Atletismo/psicologia , Adolescente , Atletas/estatística & dados numéricos , Região do Caribe , Análise Fatorial , Feminino , Humanos , Masculino , Tutoria/estatística & dados numéricos , Reprodutibilidade dos Testes , Inquéritos e Questionários/estatística & dados numéricos , Atletismo/estatística & dados numéricos , Adulto JovemRESUMO
Magnesium plays a critical role in athlete health and performance. It is involved in numerous physiological mechanisms that support energy production, immune function, pain modulation, muscle function and bone health. Athletes may be susceptible to magnesium deficiency due to an increased utilization during exercise.Objective: This study reports on the magnesium status of 192 Olympic and Paralympic athletes over the course of eight years.Methods: Athletes on the British Athletics world class performance plan undertook blood testing for Red Cell Magnesium status. Their history of tendon pain, muscle and bone injury, ethnicity, sporting event and gender were also recorded. 510 samples from 192 athletes were included in the study.Results: On at least one blood test during the study time, 22% of athletes were identified as clinically deficient (<1.19 mmol/L). The average red cell magnesium concentration was 1.34 nmol/L. Magnesium was significantly lower in female athletes and those with Black or Mixed-Race ethnicity and was higher in Throws athletes and Paralympians with Cerebral Palsy. Athletes with a history of achilles or patella tendon pain had significantly lower magnesium levels than average.Conclusions: This study highlights the importance of investigating magnesium within this population to identify deficiency and support athlete health. Several areas for future work are identified to explore the relationship between magnesium and gender, ethnicity and tendon pain and muscle injury in athletes. Furthermore, new guidelines for magnesium status within athletics populations are proposed.
Assuntos
Atletas/estatística & dados numéricos , Deficiência de Magnésio/epidemiologia , Magnésio/sangue , Estado Nutricional , Atletismo/estatística & dados numéricos , Adolescente , Adulto , Desempenho Atlético/fisiologia , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Atletismo/fisiologia , Adulto JovemRESUMO
Schneider, AL, Nikolaidis, PT, and Knechtle, B. Improved performance in master runners competing in the European championships between 1978 and 2014. J Strength Cond Res 33(9): 2559-2569, 2019-The performance trends in elite runners have been well investigated, but we have no knowledge about performance trends and the difference between the sexes in elderly runners competing at a high level in varying distances. The purpose of this study was to investigate the performance of these age groups. Data from 17 European Championships held between 1978 and 2014 were analyzed for various race distances (i.e., 100, 200, 400, 800, 1,500, 5,000, 10,000 m, and marathon). Running speed for the top 8 female and male finalists for each age group (35-99 years, split into 5-year gaps) and each race distance were included. A 2-way analysis of variance compared the effects of sex, race distance, age group and calendar year on speed. Subsequent comparisons between race distances, age groups, or calendar years were performed using a post hoc Bonferroni's test. Our analysis shows that men were faster than women in all distances, and the difference between the sexes was greater in the shorter distances. Speed was higher for shorter distances than for longer distances. Younger participants were faster than older ones, and the effect of age group was the largest for the 200 m. There was a minor effect of calendar year on speed in the 100, 20, 1,500, 10,000 m and marathon, and a minor calendar year × sex interaction on running speed was shown for the 200 m. For athletes and coaches, the current study demonstrates that both male and female athletes improved their running performance over time and that the sex gap may have reached its limit.
Assuntos
Desempenho Atlético/tendências , Corrida/tendências , Atletismo/tendências , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Desempenho Atlético/estatística & dados numéricos , Europa (Continente) , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Corrida/estatística & dados numéricos , Fatores Sexuais , Atletismo/estatística & dados numéricosRESUMO
This paper compares mortality between Gold and Silver medalists in Olympic Track and Field to study how achievement influences health. Contrary to conventional wisdom, winners die over one year earlier than losers. I find strong evidence of differences in earnings and occupational choices as a mechanism. Losers pursued higher-paying occupations than winners according to individual Census records. I find no evidence consistent with selection or risk-taking. How people respond to success or failure in pivotal life events may produce long-lasting consequences for health.
Assuntos
Atletas/estatística & dados numéricos , Longevidade , Atletismo/estatística & dados numéricos , Logro , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Adulto JovemRESUMO
The relative age effect is a well-researched phenomenon, however there is still a dearth of understanding in track and field and female sport. This study investigated the role of relative age on selection for international competition of Spanish age group athletes between 2006-2014. Six hundred and forty two athletes competed for Spain at U20 or U18 age group international competition (n = 359 males; 283 females) across 9 years. The birthdates of these athletes were compared against the population of registered athletes at that time (14,502 males; 10,096 females). The results highlighted the influential role of relative age on selection to these opportunities. In line with previous research, this effect was mediated by age and gender, with stronger effects for both males and younger athletes (U18). The data best supported the 'maturation-selection' hypothesis as a mechanism for RAEs. These results highlight the need to carefully consider the role and need for international competitive opportunities at different age groups. A number of possible context relevant solutions are discussed, including correction adjustments techniques and competition structure within track and field.
Assuntos
Envelhecimento/fisiologia , Atletas/estatística & dados numéricos , Desempenho Atlético/estatística & dados numéricos , Atletismo/estatística & dados numéricos , Adolescente , Adulto , Fatores Etários , Comportamento Competitivo/fisiologia , Feminino , Humanos , Internacionalidade , Masculino , Espanha/epidemiologia , Adulto JovemRESUMO
Decathlon and heptathlon, the flagship events in the category of "combined events" within the sport of track and field, are contested by athletes possessing skill and talent in running, jumping, and throwing. The athleticism required to excel in decathlon and heptathlon has led to the unofficial recognition of the Olympic champions in these events, as "the greatest athletes in the world." The diversity of training and the intense demands of competition place these athletes at risk for a variety of injuries. The team physician or event physician must be knowledgeable about this unique group of athletes to deliver appropriate medical care when needed. The purpose of this article is to review the common injuries and injury patterns affecting the combined event athlete.
Assuntos
Traumatismos em Atletas/epidemiologia , Transtornos Traumáticos Cumulativos/epidemiologia , Traumatismos da Perna/epidemiologia , Traumatismos dos Tendões/epidemiologia , Atletismo/lesões , Atletismo/estatística & dados numéricos , Traumatismos em Atletas/diagnóstico , Comportamento Competitivo , Transtornos Traumáticos Cumulativos/diagnóstico , Feminino , Humanos , Traumatismos da Perna/diagnóstico , Masculino , Traumatismo Múltiplo/diagnóstico , Traumatismo Múltiplo/epidemiologia , Prevalência , Fatores de Risco , Traumatismos dos Tendões/diagnósticoRESUMO
BACKGROUND: some centenarians are engaged in regular physical activity and sometimes in sporting events. OBJECTIVE: we aimed to identify world records of centenarian athletes in several sports and determine which represented the best performance when compared to all-age world records, all disciplines taken together. METHODS: all of the best performances achieved by centenarians were identified and compared in three disciplines: athletics, swimming and cycling. The performances were considered as an average of the respective speeds, except for jumping and throwing events for which the maximum distances performed were considered. Within each discipline, the decline in performance of centenarian athletes was expressed as a percentage of the world record for that discipline. In total, 60 performances of centenarian athletes were found. These performances belong to 19 individuals: 10 in athletics, 8 in swimming and 1 in cycling. RESULTS: the centenarian world record performed by Robert Marchand in one hour track cycling appears to be the best performance (-50.6% compared with the all-age world record in this discipline) achieved by a centenarian. CONCLUSIONS: although the physiological characteristics of Robert Marchand are certainly exceptional, his remarkable performance could also be due to the lower age-related decline for cycling performances compared with running and swimming. Our observations offer new perspectives on how the human body can resist the deleterious effects of ageing.
Assuntos
Idoso de 80 Anos ou mais , Atletas , Desempenho Atlético , Fatores Etários , Idoso de 80 Anos ou mais/fisiologia , Idoso de 80 Anos ou mais/estatística & dados numéricos , Atletas/estatística & dados numéricos , Desempenho Atlético/estatística & dados numéricos , Ciclismo/estatística & dados numéricos , Feminino , Humanos , Masculino , Esportes/estatística & dados numéricos , Atletismo/estatística & dados numéricosRESUMO
OBJECTIVE: Although there are a number of studies on trekkers' knowledge of acute mountain sickness (AMS), there is little current literature on other groups at altitude, for example, marathon runners. Increased knowledge of AMS is associated with a lower incidence of AMS. The purpose of this study was to determine AMS knowledge of marathon runners with an aim to improve AMS information distribution. Incidence of AMS was also determined. METHODS: Participants completed a self-assessment AMS knowledge questionnaire in Kathmandu before starting the acclimatization trek for the Tenzing Hillary Everest Marathon in Nepal. Lake Louise Scoring questionnaires were completed every day of the 12-day acclimatization trek. RESULTS: The majority (86%; 43 of 50) of participants obtained information about AMS before the marathon, with the Internet providing the most common source (50%; 25 of 50). Ninety-two percent (46 of 50) of participants rated their knowledge as average or above, and self-assessment correlated with knowledge questionnaire scores (r = .479, P < .001). However, 48% (24 of 50) did not know it was unsafe to ascend with mild AMS symptoms, and 66% (33 of 50) thought it was safe to go higher with symptoms relieved by medication. Only 50% (25 of 50) knew AMS could occur from 2500 m. Thirty-eight percent (19 of 50) of participants had AMS during the acclimatization trek, and 6% (3 of 50) experienced it during the race. CONCLUSIONS: This study adds to previous literature regarding knowledge and incidence of AMS. It further highlights that more needs to be done to improve knowledge through better information dissemination, with inclusion of scenario-based information to aid application of this knowledge to practical situations.
Assuntos
Doença da Altitude/psicologia , Conhecimentos, Atitudes e Prática em Saúde , Montanhismo/psicologia , Atletismo/psicologia , Doença Aguda , Adulto , Altitude , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Montanhismo/estatística & dados numéricos , Nepal , Autoavaliação (Psicologia) , Inquéritos e Questionários , Atletismo/estatística & dados numéricosRESUMO
Backgroud: Sports participation is a healthy behaviour but it is not without the risk of injuries. Information on the extent of sport participation and sport injuries among Nigerian Unversity students is sparse. Objeclive: To determine the prevalence and types of sport participation and injuries among university.students in Nigeria. Factors associated with sport participation among students were also examined. METHODS: A cross-sectional survey was conducted using a self-administered questionnaire to collect information on the frequcncy and types of sport participation and sport-related injuries among a representative sample of undergraduate students of the University of Lagos, Nigeria. Resuts: A sport participation prevalence of 64.2% (95%CI: 59.5 - 68.7) was recorded among students. Football (soccer) (53.2%) had the highest participation rate. Male students (78.4% vs.41.2%) participated more frequently in sports (p <0.001). Overall injury rate was 52.5 injuries/100 students/ year (95%CI: 46.5 - 58.5). The prevalence of injury was 45.7% in male and 12.7% in female students. About half (49.3%) of reported injuries resulted in time loss. The leg and ankle were the most frequently injured body parts for all injuries and most serious injuries. Football recorded the highest prevalence of injury (73.8%). CONCLUSION: Sport participation among students was fair and injury rate was considerably high, mostly affecting the lower extremity and most injuries resulting from football participation. This study suggests the need for improved sport participation support among students and the need for the initiation of injury prevention initiatives by stakeholders.
Assuntos
Traumatismos em Atletas/epidemiologia , Esportes/estatística & dados numéricos , Estudantes/estatística & dados numéricos , Adolescente , Adulto , Basquetebol/lesões , Basquetebol/estatística & dados numéricos , Estudos Transversais , Feminino , Humanos , Masculino , Nigéria/epidemiologia , Distribuição por Sexo , Futebol/lesões , Futebol/estatística & dados numéricos , Inquéritos e Questionários , Tênis/lesões , Tênis/estatística & dados numéricos , Atletismo/lesões , Atletismo/estatística & dados numéricos , Universidades , Adulto JovemRESUMO
AIM: To implement and validate the newly proposed British athletics muscle injury classification in the assessment of hamstring injuries in track and field athletes and to analyse the nature and frequency of the discrepancies. MATERIALS AND METHODS: This was a retrospective study analysing hamstring injuries in elite British athletes using the proposed classification system. Classification of 65 hamstring injuries in 45 high-level athletes by two radiologists at two time points 4 months apart to determine interrater variability, intrarater variability, and feasibility of the classification system was undertaken. RESULTS: Interrater Kappa values of 0.80 (95% confidence interval [CI]: 0.67-0.92; p<0.0001) for Round 1 and 0.88 (95% CI: 0.76-1.00; p<0.0001) for Round 2 of the review were observed. Percentages of agreement were 85% for Round 1 and 91% for Round 2. The intrarater Kappa value for the two reviewers were 0.76 (95% CI: 0.63-0.88; p<0.0001) and 0.65 (95% CI: 0.53-0.76; p<0.0001) and the average was 0.71 suggesting substantial overall agreement. The percentages of agreement were 82% and 72%, respectively. CONCLUSIONS: This classification system is straightforward to use and produces both reproducible and consistent results based on interrater and intrarater Kappa values with at least substantial agreement in all groups. Further work is ongoing to investigate whether individual grades within this classification system provide prognostic information and could guide clinical management.
Assuntos
Traumatismos em Atletas/classificação , Traumatismos em Atletas/diagnóstico , Imageamento por Ressonância Magnética , Músculo Esquelético/lesões , Doenças Musculares/classificação , Doenças Musculares/diagnóstico , Traumatismos em Atletas/patologia , Estudos de Viabilidade , Humanos , Músculo Esquelético/patologia , Doenças Musculares/patologia , Variações Dependentes do Observador , Reprodutibilidade dos Testes , Estudos Retrospectivos , Esportes/estatística & dados numéricos , Atletismo/estatística & dados numéricos , Reino UnidoRESUMO
The purpose of this study was to analyze the level of creatine use along with the perceived benefits and barriers of creatine use among collegiate athletes who participate in throwing events within the sport of track and field. A total of 258 throwers from National Collegiate Athletic Association Division I institutions completed an online survey regarding creatine. The results provided baseline levels of creatine use and allowed for the analysis of factors related to athletic conference affiliation. Results indicate that creatine use remains to be a common (32.7%) practice among throwers with significantly higher levels of use among Football Bowl Subdivision (FBS) conference athletes (44.6%) than Football Championship Subdivision (FCS) conference athletes (28.8%), χ² = 5.505, p = 0.019. The most common reasons for using creatine included a desire to improve/increase: strength (83.3%), recovery time (69.0%), and performance (60.7%). The most common perceived obstacles included contamination/quality control (39.5%), cost (33.3%), inconvenience (16.7%), and cramping (14.3%). A desire for additional education and training was noted through an expression of interest (55.6%) with significantly higher levels of interest from FBS athletes (65.6%) than FCS athletes (52.2%), χ² = 6.425, p = 0.039. However, the athletic departments provide nutritional supplement counseling at only 26.6% of the schools. Although the access to full-time nutritionist counsel was available at 57.3% of the schools, there was a significant difference (χ² = 9.096, p = 0.003) between FBS schools (73.7%) and FCS schools (51.7%).
Assuntos
Informação de Saúde ao Consumidor , Creatina , Suplementos Nutricionais , Uso de Medicamentos/estatística & dados numéricos , Substâncias para Melhoria do Desempenho , Atletismo/estatística & dados numéricos , Adolescente , Creatina/efeitos adversos , Suplementos Nutricionais/efeitos adversos , Feminino , Humanos , Masculino , Substâncias para Melhoria do Desempenho/efeitos adversos , Inquéritos e Questionários , Estados Unidos , Universidades , Adulto JovemRESUMO
PURPOSE: To examine which school sports engage children in more physical activity. DESIGN: Observational, cross-sectional study examining differences between intramural (IM) and interscholastic (IS) sports. SETTING: Athletic facilities at two schools with IM sports and two schools with IS sports in Wake County, North Carolina. SUBJECTS: Middle-school children (N = 6735). MEASURES: Percentage of children observed in sedentary, moderate, and vigorous activity assessed by the System for Observation Play and Leisure Among Youth (SOPLAY). Energy expenditure and physical activity intensity were also estimated by using MET values. ANALYSIS: T-tests; generalized linear model using cumulative logit link function. RESULTS: IM sports had higher MET values than IS sports (t = -3.69, p < .001), and IM sports ranked in four of the top five sports in terms of average MET values. Regression models found a significant interaction between school sport delivery model and gender, with boys significantly less physically active in IS programs than boys in IM programs (B = -.447, p < .001) but more physically active (B = .359, p <.001) than girls in IM sports. CONCLUSION: Regardless of sport type, IM sports generated more physical activity than IS sports among boys but not girls. Soccer, basketball, and track, regardless of school delivery approach, provide the highest physical activity levels. Results suggest that school administrators consider reassessing their programs to more efficiently use diminishing resources to increase students' physical activity levels.
Assuntos
Atividade Motora/fisiologia , Instituições Acadêmicas/normas , Esportes/fisiologia , Adolescente , Basquetebol/fisiologia , Basquetebol/estatística & dados numéricos , Criança , Comportamento de Escolha , Estudos Transversais , Feminino , Humanos , Masculino , North Carolina , Política Organizacional , Instituições Acadêmicas/estatística & dados numéricos , Fatores Sexuais , Futebol/fisiologia , Futebol/estatística & dados numéricos , Esportes/estatística & dados numéricos , Atletismo/fisiologia , Atletismo/estatística & dados numéricosRESUMO
The relative-age effect refers to a higher frequency of athletes with birthdates earlier in the competitive year. Track and field athletics has a 2-year competitive cycle at youth and junior levels that could make it particularly susceptible to the effect. We have therefore investigated the effect in athletics event finalists (first to eighth place) at the 2008 Junior Championships (men and women aged ≤ 19 years; n=1479) and the 2009 Youth Championships (boys and girls aged 16-17 years; n=1445). Counts of finalists differing in age by 1 year were estimated with Poisson regression and compared as factor effects (with ×/÷ 90% confidence limits and assessment of magnitude). The factor effects were: junior men 2.1 (×/÷ 1.4, large); junior women 1.7 (×/÷ 1.4, moderate); youth boys 3.7 (×/÷ 1.4, very large); youth girls 2.1 (×/÷ 1.3, large). Analysis by event group indicated the age effect was greatest in youth boys' sprints & hurdles (4.0, ×/÷ 1.7, very large), throws (7.2, ×/÷ 2.3, very large) and jumps (5.6, ×/÷ 1.9, very large), whereas it was smallest in junior men's throws (1.4, ×/÷ 1.4, small) and youth girls' jumps (1.4, ×/÷ 1.4, small). In conclusion, the marked relative-age effects in athletics must exclude some talented younger athletes from youth and junior championships and presumably discourage them from continuing to senior championships. The consequences are a lower overall standard of performance and, for some athletes, termination of involvement in athletics before realising their full potential. An alternative structure and calendar is needed to make youth and junior athletics championships more equitable.
Assuntos
Atletas/estatística & dados numéricos , Desempenho Atlético/estatística & dados numéricos , Atletismo/estatística & dados numéricos , Adolescente , Adulto , Fatores Etários , Feminino , Humanos , Masculino , Adulto JovemRESUMO
Physical training has been shown to reduce mortality in normal subjects, and athletes have a healthier lifestyle after their active career as compared with normal subjects. Since the 1950s, the use of anabolic androgenic steroids (AAS) has been frequent, especially in power sports. The aim of the present study was to investigate mortality, including causes of death, in former Swedish male elite athletes, active 1960-1979, in wrestling, powerlifting, Olympic lifting, and the throwing events in track and field when the suspicion of former AAS use was high. Results indicate that, during the age period of 20-50 years, there was an excess mortality of around 45%. However, when analyzing the total study period, the mortality was not increased. Mortality from suicide was increased 2-4 times among the former athletes during the period of 30-50 years of age compared with the general population of men. Mortality rate from malignancy was lower among the athletes. As the use of AAS was marked between 1960 and 1979 and was not doping-listed until 1975, it seems probable that the effect of AAS use might play a part in the observed increased mortality and suicide rate. The otherwise healthy lifestyle among the athletes might explain the low malignancy rates.
Assuntos
Causas de Morte , Suicídio/estatística & dados numéricos , Atletismo/estatística & dados numéricos , Levantamento de Peso/estatística & dados numéricos , Luta Romana/estatística & dados numéricos , Adulto , Anabolizantes/uso terapêutico , Dopagem Esportivo , Humanos , Estilo de Vida , Masculino , Pessoa de Meia-Idade , Mortalidade , Neoplasias/mortalidade , Suécia/epidemiologia , Adulto JovemRESUMO
BACKGROUND: Major head injuries are not uncommon in the Irish national game of hurling. Historically, helmets were not worn. METHODS: We report a multistage campaign to facilitate and encourage the use of appropriate headgear among the estimated 100 000 hurling players in Ireland. This campaign lasted for 27 years between 1985 and 2012, and involved a number of different stages including: (1) facilitating the establishment of a business dedicated to developing head protection equipment suitable for hurling, (2) placing a particular emphasis on continual product enhancement to the highest industrial standards, (3) engaging continually with the game's controlling body, the Gaelic Athletic Association (GAA), with the ultimate objective of securing a mandatory usage policy for protective helmets and faceguards, (4) longitudinal research to monitor hurling injury, equipment usage and players' attitudes and (5) widely communicating key research findings to GAA leaders and members, as well as to 1000 clubs and schools. RESULTS: One of our three relevant studies included 798 patients and identified a dramatic association between the type of head protection used by a player, if any, and the site of the injury requiring treatment. While 51% of the injured players without head protection suffered head trauma, this rate was only 35% among the players wearing helmets and 5% among players who were wearing full head protection (both a helmet and faceguard). CONCLUSION: The GAA responded in three stages to the accumulating evidence: (1) they introduced a mandatory regulation for those aged less than 18 years in 2005; (2) this ruling was extended to all players under 21 years in 2007 and (3) finally extended to all players irrespective of age, gender or grade from January 2010. The latter ruling applied to both games and organised training sessions.
Assuntos
Traumatismos Craniocerebrais/prevenção & controle , Dispositivos de Proteção da Cabeça/estatística & dados numéricos , Atletismo/lesões , Adolescente , Traumatismos em Atletas/epidemiologia , Traumatismos em Atletas/prevenção & controle , Criança , Traumatismos Craniocerebrais/epidemiologia , Coleta de Dados , Desenho de Equipamento , Conhecimentos, Atitudes e Prática em Saúde , Política de Saúde , Promoção da Saúde/organização & administração , Humanos , Irlanda/epidemiologia , Comportamento de Redução do Risco , Atletismo/legislação & jurisprudência , Atletismo/estatística & dados numéricos , Adulto JovemRESUMO
The aim of the research was to ascertain the level of correlation between some kinematic parameters and the result success in the pole vault, using the sample of the best European female junior athletes. A set of 11 kinematic parameters has been applied, according to the McGinnis model, representing a predictor assemblage of variables. The maximum height vaulted presented a criterion variable. The research was conducted at the European Junior Athletics Championships in 2009. The entities were represented by the vaults in the final part of the competition. A general hypothesis of achieving a positive correlation between the system of predictor variables and the criteria had been set, and later confirmed. The results of the pole vault regression analysis confirmed the multiple correlations between the two groups of variables. The greatest influences on the prediction of pole vault success, regarding all the analyzed kinematic parameters, were the following variables: maximum pole bend, last stride speed and time of pole bend. The results were as expected, and can be used in kinesiology practice, especially during the technique learning process in young pole vaulters, but also in development of motor abilities relevant for success in this track and field discipline.