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European Journal of Sport Science

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https://www.readbyqxmd.com/read/28691581/a-shower-before-bedtime-may-improve-the-sleep-onset-latency-of-youth-soccer-players
#1
Craig Whitworth-Turner, Rocco Di Michele, Ian Muir, Warren Gregson, Barry Drust
During the competitive season, soccer players are likely exposed to numerous factors that may disrupt the process of sleep. The current investigation looked to evaluate a practical sleep hygiene strategy (10-min showering at ∼40°C before lights out), within a group of 11 youth soccer players in comparison to normal sleeping conditions (control). Each condition consisted of three days within a randomised crossover trial design. Sleep information was collected using a commercial wireless bedside sleep monitor...
July 9, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28649935/evidence-of-sub-optimal-sleep-in-adolescent-middle-eastern-academy-soccer-players-which-is-exacerbated-by-sleep-intermission-proximal-to-dawn
#2
Peter M Fowler, Darren J Paul, Gustavo Tomazoli, Abdulaziz Farooq, Richard Akenhead, Lee Taylor
The purpose was to assess sleep patterns, quantity and quality in adolescent (16.2 ± 1.2 yr) Middle Eastern academy soccer players (n = 20) and the influence of an intermission upon these characteristics. On a 17-day training camp (located one time zone west of home) including three discrete matches, sleep was assessed pre- (PRE) and post-match (POST) via wrist actigraphy. Retrospective actigraphy analysis identified sleep characteristics, including if players experienced a sleep intermission (YES) or not (NO) proximal to dawn, and bedtime (hh:mm), get-up time (hh:mm), time in bed (h), sleep duration (h) and sleep efficiency (%)...
June 25, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28478704/the-interaction-of-psychological-and-physiological-homeostatic-drives-and-role-of-general-control-principles-in-the-regulation-of-physiological-systems-exercise-and-the-fatigue-process-the-integrative-governor-theory
#3
A St Clair Gibson, J Swart, R Tucker
Either central (brain) or peripheral (body physiological system) control mechanisms, or a combination of these, have been championed in the last few decades in the field of Exercise Sciences as how physiological activity and fatigue processes are regulated. In this review, we suggest that the concept of 'central' or 'peripheral' mechanisms are both artificial constructs that have 'straight-jacketed' research in the field, and rather that competition between psychological and physiological homeostatic drives is central to the regulation of both, and that governing principles, rather than distinct physical processes, underpin all physical system and exercise regulation...
May 6, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28747143/the-relationship-between-physical-activity-fitness-physical-complaints-and-bmi-in-german-adults-results-of-a-longitudinal-study
#4
Susanne A Tittlbach, Darko Jekauc, Steffen C E Schmidt, Alexander Woll, Klaus Bös
OBJECTIVES: This study's aims were to describe the development of physical activity, physical fitness (PF), subjective (physical complaints (PC)) and objective (Body mass index (BMI)) health measures and to examine the relationship between the development trajectories. In addition, the study also aimed to assess the influence of sociodemographic determinants (age, sex, socioeconomic status (SES)) in German adults over a period of 18 years. METHODS: The longitudinal study population comprises of 721 men and women, aged 33-76 years over the study period...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28685647/effects-of-a-phase-change-cooling-garment-during-exercise-in-the-heat
#5
Cory L Butts, Madeline L Torretta, Cody R Smith, Adam J Petway, Brendon P McDermott
The purpose of our study was to examine the physiological, perceptual, and performance effects of wearing a phase change cooling garment (CG) during an interval exercise routine in the heat. Sixteen male participants (age 23 ± 3 years, ht 1.76 ± 0.11 m; wt 78.5 ± 11.2 kg; body fat 15.2 ± 5.8%) completed two trials (one with phase change inserts, CG, and one control without inserts) consisting of two submaximal exercise portions separated by 5-minute seated rest, and a final maximal effort performance bout...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28682215/could-slackline-training-complement-the-fifa-11-programme-regarding-training-of-neuromuscular-control
#6
Tobias Jäger, Julian Kiefer, Inge Werner, Peter A Federolf
The current study compared changes in neuromuscular control between slackline training and the stabilization training elements of the FIFA 11+ programme. Twenty-five students in 2 groups performed a 12-unit training programme. The slackline training group (n = 13) exclusively trained with a slackline. The stabilization training group (n = 12) practised exercises as described in the second part of the FIFA 11+ programme. Improvements in balance were assessed using three tests for dynamic, quasi-static, and perturbed postural control: the star excursion balance test (SEBT), the closed-eye single-leg stance, and the MFT S3-Check...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28675124/combined-individual-scrummaging-kinetics-and-muscular-power-predict-competitive-team-scrum-success
#7
Andrew Green, Chloe Dafkin, Samantha Kerr, Warrick McKinon
Scrummaging is a major component of Rugby Union gameplay. Successful scrummaging is dependent on the coordination of the forward players and the strength of the eight individuals. The study aim was to determine whether individual scrummaging kinetics and other candidate factors associated with scrummaging performance discriminate team scrum performances. Sixteen club-level forwards (stature: 1.80 ± 0.1 m; mass: 99.0 ± 18.2 kg) were initially divided into two scrummaging packs. A total of 10 various scrum permutations were tested, where players were randomly swapped between the two packs...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28671855/free-weight-resistance-exercise-on-pulse-wave-reflection-and-arterial-stiffness-between-sexes-in-young-resistance-trained-adults
#8
J Derek Kingsley, Yu Lun Tai, Xian Mayo, Alaina Glasgow, Erica Marshall
We sought to determine the sex-specific effects of an acute bout of free-weight resistance exercise (RE) on pulse wave reflection (aortic blood pressures, augmentation index (AIx), AIx at 75 bpm (AIx@75), augmentation pressure (AP), time of the reflected wave (Tr), subendocardial viability ratio (SEVR)), and aortic arterial stiffness in resistance-trained individuals. Resistance-trained men (n = 14) and women (n = 12) volunteered to participate in the study. Measurements were taken in the supine position at rest, and 10 minutes after 3 sets of 10 repetitions at 75% 1-repetition maximum on the squat, bench press, and deadlift...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28651483/induced-beliefs-about-a-fictive-energy-drink-influences-200-m-sprint-performance
#9
Ricardo de la Vega, Sara Alberti, Roberto Ruíz-Barquín, István Soós, Attila Szabo
Placebo and nocebo effects occur in response to subjective expectations and their subsequent neural actions. Research shows that information shapes expectations that, consequently, influence people's behaviour. In this study, we examined the effects of a fictive and inert green colour energy drink provided for three groups (n = 20/group) with different information. The first group was led to expect that the drink augments running performance (positive information), the second group was led to expect that the drink may or may not improve performance (partial-positive information), while the third group was told that earlier research could not demonstrate that the drink improves performance (neutral/control)...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28641044/the-effects-of-short-versus-long-inter-set-rest-intervals-in-resistance-training-on-measures-of-muscle-hypertrophy-a-systematic-review
#10
Jozo Grgic, Bruno Lazinica, Pavle Mikulic, James W Krieger, Brad Jon Schoenfeld
Although the effects of short versus long inter-set rest intervals in resistance training on measures of muscle hypertrophy have been investigated in several studies, the findings are equivocal and the practical implications remain unclear. In an attempt to provide clarity on the topic, we performed a systematic literature search of PubMed/MEDLINE, Scopus, Web of Science, Cochrane Library, and Physiotherapy Evidence Database (PEDro) electronic databases. Six studies were found to have met the inclusion criteria: (a) an experimental trial published in an English-language peer-reviewed journal; (b) the study compared the use of short (≤60 s) to long (>60 s) inter-set rest intervals in a traditional dynamic resistance exercise using both concentric and eccentric muscle actions, with the only difference in resistance training among groups being the inter-set rest interval duration; (c) at least one method of measuring changes in muscle mass was used in the study; (d) the study lasted for a minimum of four weeks, employed a training frequency of ≥2 resistance training days per week, and (e) used human participants without known chronic disease or injury...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28628370/multiple-joint-exercises-using-elastic-resistance-bands-vs-conventional-resistance-training-equipment-a-cross-over-study
#11
Vegard M Iversen, Paul Jarle Mork, Ottar Vasseljen, Ronny Bergquist, Marius S Fimland
Previous studies indicate that elastic resistance bands (ERB) can be a viable option to conventional resistance-training equipment (CRE) during single-joint resistance exercises, but their efficacy has not been established for several commonly used multiple-joint resistance exercises. Thus, we compared muscular activation levels in four popular multiple-joint exercises performed with ERB (TheraBand(®)) vs. CRE (Olympic barbell or cable pulley machines). In a cross-over design, men and women (n = 29) performed squats, stiff-legged deadlifts, unilateral rows and lateral pulldown using both modalities...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28627289/snap-n-send-a-valid-and-reliable-method-for-assessing-the-energy-intake-of-elite-adolescent-athletes
#12
Nessan Costello, Kevin Deighton, Joshua Dyson, Jim Mckenna, Ben Jones
To ensure that elite adolescent athletes meet their unique training, growth and maturation demands, it is imperative to have access to valid measures of energy intake. Contemporary methods demand close attention-to-detail, meaning that athletes often do not fully adhere to real-time protocols. This study represents the first investigation of a real-time dietary assessment designed using a comprehensive behaviour change framework (COM-B). In a crossover design, 12 elite adolescent male rugby players recorded their energy intake via an estimated food diary (est-FD) and photography-based mobile assessment ('Snap-n-Send'), combined with a 24-h dietary recall interview...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28609253/relationship-of-tennis-play-to-executive-function-in-children-and-adolescents
#13
Toru Ishihara, Shigemi Sugasawa, Yusuke Matsuda, Masao Mizuno
This study evaluated the association between the frequency of tennis play and executive function in children and adolescents. One hundred and six junior tennis players (6-15 years old) participated in this study. Executive function, including inhibitory control, working memory, and cognitive flexibility were evaluated at rest. Females showed better inhibitory control and cognitive flexibility than males. In males, more frequent tennis play was associated with higher basic processing speed and inhibitory control after controlling for age, gender, body mass index (BMI), and tennis experience...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28609196/horizontal-ground-reaction-forces-to-stationary-running-performed-in-the-water-and-on-dry-land-at-different-physiological-intensities
#14
Cristine Lima Alberton, Stephanie Santana Pinto, Gabriela Neves Nunes, Douglas Guerreiro Dos Santos Rau, Paula Finatto, Amanda Haberland Antunes, Marcus Peikriszwili Tartaruga, Marco Bergamin, Eduardo Lusa Cadore, Luiz Fernando Martins Kruel
The aim of the present study was to compare the peak anterior-posterior (Fy) and medio-lateral (Fx) ground reaction forces (GRFs) of women performing stationary running at different intensities in aquatic and dry land environments. Fourteen young women performed the stationary running exercise at three cadences (first ventilatory threshold, second ventilatory threshold and maximum effort, as determined during exercise in water) in aquatic and dry land environments. Two-way repeated measures ANOVA was used to analyse the data (α = ...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28585467/do-players-and-staff-sleep-more-during-the-pre-or-competitive-season-of-elite-rugby-league
#15
Johnpaul Caia, Tannath J Scott, Shona L Halson, Vincent G Kelly
This study establishes the sleep behaviour of players and staff during the pre- and competitive seasons of elite rugby league. For seven days during both the pre- and competitive seasons, seven rugby league players and nine full-time staff from one professional Australian rugby league club had their sleep monitored via wrist actigraphy and self-report sleep diaries. Two-way repeated measures analysis of variance determined differences between the pre- and competitive season in players and staff, with effect sizes (ES) used to interpret the practical magnitude of differences...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28581367/carbohydrate-mouth-rinse-improves-morning-high-intensity-exercise-performance
#16
Neil D Clarke, Scott Hammond, Evangelos Kornilios, Peter D Mundy
Oral carbohydrate (CHO) rinsing has been demonstrated to provide beneficial effects on exercise performance of durations of up to one hour. The aim of the present study was to investigate the effects of CHO mouth rinsing on morning high-intensity exercise performance. Following institutional ethical approval and familiarisation, 12 healthy males (mean ± SD age: 23 ± 3 years, height: 175.5 ± 7.4 cm, body mass: 75.4 ± 7.5 kg) participated in this study. Countermovement jump (CMJ) height, isometric mid-thigh pull peak force, 10 m sprint time and bench press and back squat repetitions to failure were assessed following CHO and placebo (PLA) rinsing or a control condition (CON)...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28562182/effect-of-dual-attention-task-on-attack-and-defensive-actions-in-fencing
#17
Marcos Gutiérrez-Davila, F Javier Rojas, Carmen Gutiérrez-Cruz, Enrique Navarro
The objectives of this study were to investigate the effect that the presence of two stimuli that require two different responses (dual-attention) has both, on offensive reaction-response time to a light stimulus, and on defensive response time when the stimulus is a real fencing attack. Twenty-five elite fencers and a fencing master were included in the study. The equipment included four force plates adapted to a scaffold that served as a fencing piste. Two force plates were placed, at the start position, under the fencer's feet and another two plates were placed under the master's feet...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28557670/validity-and-reliability-of-the-moxy-oxygen-monitor-during-incremental-cycling-exercise
#18
E M Crum, W J O'Connor, L Van Loo, M Valckx, S R Stannard
INTRODUCTION: The Moxy is a novel, cutaneously placed muscle oxygen monitor which claims to measure local oxygen saturation (SmO2) and total haemoglobin (THb) using near-infrared spectroscopy. If shown to be reliable, its data storage and telemetric capability will be useful for assessing localised O2 usage during field-based exercise. This study investigated the reliability of the Moxy during cycling and assessed the correlations between its measurements, whole-body O2 consumption (VO2) and heart rate (HR)...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28537195/caffeine-ingestion-acutely-enhances-muscular-strength-and-power-but-not-muscular-endurance-in-resistance-trained-men
#19
Jozo Grgic, Pavle Mikulic
The goal of this randomized, double-blind, cross-over study was to assess the acute effects of caffeine ingestion on muscular strength and power, muscular endurance, rate of perceived exertion (RPE), and pain perception (PP) in resistance-trained men. Seventeen volunteers (mean ± SD: age = 26 ± 6 years, stature = 182 ± 9 cm, body mass = 84 ± 9 kg, resistance training experience = 7 ± 3 years) consumed placebo or 6 mg kg(-1) of anhydrous caffeine 1 h before testing...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28537784/the-dangerousness-of-mountain-recreation-a-quantitative-overview-of-fatal-and-non-fatal-accidents-in-france
#20
Bastien Soulé, Brice Lefèvre, Eric Boutroy
In France, there is a growing enthusiasm for outdoor sports and recreation. In the meantime, the risk of both severe and frequent injury associated with active pursuits in mountain areas is acknowledged. This paper tackles accidents related to mountain sports, with a focus on three critical activities: hiking, mountaineering and ski touring. The aim consists of estimating the actual number of accidents (whether they entailed deaths or injuries) in the three above-mentioned activities. In order to align the information collected, then provide estimations based on the reasoned crossing of these secondary data, we consulted and summarised all the databases available on the French territory...
August 2017: European Journal of Sport Science
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