Search results for "SPORTS MEDICINE"

The micro-macro link in understanding sport tactical behaviours: Integrating information and action at different levels of system analysis in sport

2015

Les liens micro-macroscopiques sont centraux dans les sciences du mouvement humain dans la mesure ou ils correspondent aux coordinations et aux echelonnages des comportements moteurs a differents niveaux d’analyse des systemes complexes. Cet aspect de la complexite est un point cle permettant de considerer decision et action comme un comportement de transition a differents niveaux lors de la realisation d’une performance. Les transitions exprimees en termes de bifurcations sont une part importante du mecanisme universel de decision. Les transitions de phase fournissent aussi un moyen de comprendre les liens micro-macro. Dans cet article de synthese, nous developpons un point de vue qui expl…

The micro-macro link in understanding sport tactical behaviours: Integrating information and action at different levels of system analysis in sport

2015

The micro-macro link is a central issue of human movement sciences because it directly refers to coordination and scalability of movement behaviour at different levels of analysis in a complex system. This feature of complexity is a key feature to consider decisions and actions as transitional behaviours at different levels during performance. Transitions expressed through bifurcations are an important part of a universal decisionmaking process. Here we explain how individuals perform decision-making behaviours in a minimal social performance unit ( competing dyads), and how these two levels are linked in a sports team. Finally we discuss some applications of the micro-macro links for the d…

Students' self-determined motivation in physical education and intention to be physically active after graduation : the role of perceived competence …

2014

Purpose: This study examined whether high school students' degree of self-determined motivation in school physical education predicted their intentions to be physically active after graduation, and whether perceived physical competence and physical activity identity mediated this hypothesized cross-sectional relationship. Additionally, the possibility of conditional effects of gender on these associations was considered. Method: A cross sectional study involving 1650 high-school students allowed for the examination of indirect effects using a bias-corrected bootstrapping technique. Results: Results showed that self-determination in PE may positively affect adolescents' intentions to be phys…

Specific distribution of cross-sectional area in each hamstring muscle of sprint runners and relationship between those and sprint performance

2018

Physical activity as a protective factor for dementia and Alzheimer’s disease: systematic review, meta-analysis and quality assessment of cohort and …

2022

ObjectivePhysical activity (PA) is associated with a decreased incidence of dementia, but much of the evidence comes from short follow-ups prone to reverse causation. This meta-analysis investigates the effect of study length on the association.DesignA systematic review and meta-analysis. Pooled effect sizes, dose–response analysis and funnel plots were used to synthesise the results.Data sourcesCINAHL (last search 19 October 2021), PsycInfo, Scopus, PubMed, Web of Science (21 October 2021) and SPORTDiscus (26 October 2021).Eligibility criteriaStudies of adults with a prospective follow-up of at least 1 year, a valid cognitive measure or cohort in mid-life at baseline and an estimate of the…

Psychometric Evaluation of the Norwegian Versions of the Modified Group Environment Questionnaire and the Youth Sport Environment Questionnaire

2021

This study aimed to translate the modified Group Environment Questionnaire (GEQ) and the Youth Sport Environment Questionnaire (YSEQ) into Norwegian, examine the factor structure and reliability of the scales through independent clusters model confirmatory factor analysis (ICM-CFA) and exploratory structural equation modeling (ESEM), and examine differential item functioning (DIF) as a function of sex. Three-hundred-and-thirty-three athletes (M(SD)age  = 18.7(2.60) years; 33% females) completed the GEQ. Three-hundred-and-three athletes (M(SD)age  = 15.0(1.48) years; 26% females) completed the YSEQ. Results indicated acceptable fit indices for a four-factor, a second-order two-factor (task a…

Assessment of sleep disturbances with the athlete sleep screening questionnaire in Chinese athletes.

2021

This study investigated the factors that are associated with sleep disturbances among Chinese athletes. Sleep quality and associated factors were assessed by the Athlete Sleep Screening Questionnaire (ASSQ, n ​= ​394, aged 18–32 years, 47.6% female). Sleep difficulty score (SDS) and level of sleep problem (none, mild, moderate, or severe) were used to classify participants' sleep quality. Categorical variables were analyzed by Chi-square or fisher's exact tests. An ordinal logistic regression analysis was used to explore factors with poor sleep (SDS ≥8). Approximately 14.2% of participants had moderate to severe sleep problem (SDS ≥8). Fifty-nine percent of the athletes reported sleep distu…

Accelerometer-based physical activity in need satisfaction profiles of schoolchildren: A 3-year follow-up

2023

This study examined moderate-to-vigorous physical activity (MVPA) trends in physical education (PE) classes and beyond school hours in children's need satisfaction profiles over 3 years. Participants were 445 (girls 256, boys 189) Finnish schoolchildren ( Mage = 11.26 ± 0.32 years). Need satisfaction self-reports and accelerometer-based MVPA data were collected in 17 comprehensive schools over four assessment phases. Four latent profiles based on the need satisfaction trends over time were found: Profiles with Large Decrease, Small Decrease, Small Increase, and Large Increase. The children with the most prominent need satisfaction decreases showed a significant decline in out-of-school MVP…

Predicting the 2000‐m Rowing Ergometer Performance from Anthropometric, Maximal Oxygen Uptake and 60‐s Mean Power Variables in National Level Young R…

2020

Abstract Many studies reported various relationships between 2000-m rowing performance and anthropometric as well as metabolic variables, however, little is known about 60-s mean power in elite youth athletes. The aim of this study was to develop different regression models to predict 2000-m rowing indoor performance time (t2000) using anthropometric variables, maximal oxygen uptake (VO2max) and mean power established during a 60-s all-out test (W60) in national elite youth rowers. Fifteen youth male Italian rowers (age: 15.7 ± 2.0 years; body height: 176.0 ± 8.0 cm; body mass: 71.2 ± 10.0 kg) performed an incremental maximal test, a 60-s all-out test and a 2000-m race simulation using a Co…

High training volume is associated with increased prevalence of non-allergic asthma in competitive cross-country skiers.

2022

BackgroundCross-country skiers have a high prevalence of asthma, but its phenotypes and association with success in competitions are not known.ObjectiveTo investigate, by means of a postal survey, the relative proportions of allergic and non-allergic asthma in competitive cross-country skiers compared with the general population, to study how performance level and training volume are related to asthma and its type and to assess the possible risk factors for allergic and non-allergic asthma in competitive skiers.MethodsAll Finnish cross-country skiers enrolled in the largest national competitions in winter 2019 (n=1282), and a random sample (n=1754) of the general population of the same age …