Search results for "Sports"

Contrasts in fitness, motor competence and physical activity among children involved in single or multiple sports

2021

Abstract Study aim: While there is wide debate around specialization in one sport, there is a lack of information about fitness levels and motor competence of children participating in single or multiple sports. Material and methods: The study involved 358 fifth-grade children who participated in a set of health-related fitness and motor competence tests over two consecutive years. A subsample of children (n = 109) wore an accelerometer for seven consecutive days. The independent samples t-test and ANCOVA were used to compare differences between single and multi-sport participants in study variables and changes between baseline and follow-up. Results: Multi-sport participants performed bett…

Watch your step! Is foot landing technique during cutting manoeuvres associated with acute lower extremity injuries? : a 12-month prospective cohort …

2019

Useita pallopelejä luonnehtivat erilaiset nopeat suunnanmuutokset sekä äkilliset kiihdytykset, mitkä altistavat etenkin nuoria urheilijoita akuuteille alaraajavammoille. Aiempien tutkimusten valossa on esitetty, että jalkaterän laskeutumistekniikka saattaisi olla yhteydessä vammariskiin sekä erityyppisiin juoksuvammoihin. Hyvin vähän tiedetään kuitenkin jalkaterän laskeutumistekniikan yhteyksistä alaraajojen kinematiikkaan erityisesti nopeiden suunnanmuutosten aikana. Tämän tutkimuksen tarkoituksena oli selvittää, onko nopeiden suunnanmuutosten yhteydessä esiintyvällä jalkaterän laskeutumistekniikalla yhteys nuorten palloilijoiden akuutteihin, ilman suoraa kontaktia, tapahtuneisiin nilkan- …

Players with high physical fitness are at greater risk of injury in youth football.

2022

The aim of this study was to investigate physical fitness, football-specific skills and their association with injury risk in youth football. Altogether 447 male and female players aged 9 to 14 years (median 12 years) participated in performance tests and prospective follow-up. The physical fitness tests included five-jump test for distance, 30-m sprint, football-specific figure of eight agility, countermovement jump, and Yo-Yo intermittent endurance test level 1. The football-specific skill tests included dribbling and passing tests. Injuries and exposure were registered during the 20-week follow-up. Our candidate risk factors were low/high level of physical fitness measured with a composi…

Physical loading and later lower-limb function and findings : a study among male former elite athletes

2000

Tendon length estimates are influenced by tracking location

2022

Abstract Purpose Measurement of medial gastrocnemius (MG) tendon length using ultrasonography (US) requires the muscle–tendon junction (MTJ) to be located. Previously, the MG MTJ has been tracked from different proximo-distal locations near the MTJ, which could influence estimates of tendon length change due to the different characteristics of the aponeurosis and tendon. We used US to evaluate the effect of tracking point location on MG MTJ displacement during maximal and submaximal (10, 20 and 30% of the non-injured maximal) isometric plantar flexion contractions. Methods Displacement behaviour of MTJ was tracked from (1) the exact MTJ; and (2) from an insertion point of a muscle fascicle …

Inter‐individual variation of the urinary steroid profiles in Swedish and Norwegian athletes

2020

The steroidal module of the Athlete Biological Passport (ABP) aims to detect doping with endogenous steroids, e.g. testosterone (T), by longitudinally monitoring several biomarkers. These biomarkers are ratios combined of urinary concentrations of testosterone and metabolically related steroids. However, it is evident after five years of monitoring steroid passports, that there are large variations in the steroid ratios complicating its interpretation. In this study, we used over 11 000 urinary steroid profiles from Swedish and Norwegian athletes to determine both the inter‐ and intra‐individual variations of all steroids and ratios in the steroidal passport. Furthermore, we investigated if…

Restitusjonsvaner hos unge toppidrettsutøvere i Sør-Norge : En kartleggingsstudie av utholdenhet- og ballspillutøvere

2018

Masteroppgave idrettsvitenskap ME517 - Universitetet i Agder 2018 Background: In order to perform optimally in training and competition, the recovery inbetween, through adequate diet and sufficient sleep/rest, is of great importance. Up until now, most studies have only featured adult athletes. Similarly, studies conducted on young athletes, as well as across sports, are limited. Purpose: The purpose of this study was to assess the habits of recovery, in terms of diet and sleep, with regards to the recommendations given by Helsedirektoratet and Olympiatoppen. Further investigating the use of different recovery strategies, among young elite athletes in southern Norway. Method: A total of 36 …

Physiotherapists’ validating and invalidating communication before and after participating in brief cognitive functional therapy training : Test of c…

2021

Objective The aim of this study was to investigate physiotherapists’ validating and invalidating communication, before and after brief Cognitive Functional Therapy (CFT) training that included a session on validation skills. Associations between validation/invalidation and the characteristics of the interviews and physiotherapists were also explored. Methods Eighteen physiotherapists treating patients with low back pain participated in the study. The study had a within-group design in which validation and invalidation for physiotherapists were rated before and after training using a reliable observational scale. We also collected data on interview length and physiotherapists’ and patients’ …

Comparison of inter-trial recovery times for the determination of critical power and W' in cycling

2017

Critical Power (CP) and W’ are often determined using multi-day testing protocols. To investigate this cumbersome testing method, the purpose of this study was to compare the differences between the conventional use of a 24-h inter-trial recovery time with those of 3 h and 30 min for the determination of CP and W’. Methods: 9 moderately trained cyclists performed an incremental test to exhaustion to establish the power output associated with the maximum oxygen uptake (p V O2max), and 3 protocols requiring time-to-exhaustion trials at a constant work-rate performed at 80%, 100% and 105% of p VO2max. Design: Protocol A utilised 24-h inter-trial recovery (CP24/W’24), protocol B utilised 3-h in…

Escala de Percepción de Promoción del Bienestar para Entrenadores (EPPBE): Análisis inicial de sus propiedades psicométricas y validez. (Perception o…

2011

Este estudio analizo las propiedades psicometricas de la Escala de Percepcion de Promocion del Bienestar para Entrenadores (EPPBE), compuesta por 6 dimensiones: Autocontrol, castigo, apoyo social, apoyo a la autonomia, apoyo a la competencia y apoyo a la afiliacion. Se administro la escala a 506 entrenadores y se realizo un analisis factorial confirmatorio. La validez nomologica se analizo a traves de las relaciones de las variables con la satisfaccion de necesidades basicas y la motivacion autodeterminada. El modelo mostro un ajuste adecuado a los datos. El castigo percibido no correlaciono con el resto de variables de la escala, que si mostraron correlaciones positivas entre ellas, hasta …