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Elite players

Brun Jean-Frédéric, Varlet-Marie Emmanuelle, Fédou Christine, Raynaud de Mauverger Eric
We investigated to what extent a prediction of the 'ideal' hematocrit based on individual hemorheological profile with an equation of viscosity is relevant in trained athletes, and how the agreement between theoretical and actual values is modified by changes in training volume and performance. Elite soccer players (national level: 18-32 yr, weight 61-83 kg, body mass index 20.9-25.8 kg/m2) were seen twice at one year interval. Hemorheologic parameters were measured with the MT90 viscometer and the Myrenne aggregometer the theoretical bell-shaped curve of hematocrit/viscosity ratio as a function of hematocrit was reconstructed with Quemada's equation using actual plasma viscosity and red cell rigidity to predict hematocrit/viscosity at various hematocrit levels...
October 15, 2016: Clinical Hemorheology and Microcirculation
Rosario Scarfone, Antonio Ammendolia
BACKGROUND: The aim of this study was to investigate the physiological demands and technical-tactical performances of field players in Italian elite beach soccer team. METHODS: Three official matches of the Italian First Division beach soccer tournament were analyzed to evaluate the heart rate (HR) and time-motion analysis considering: standing, walking, jogging, running and sprinting, and technical-tactical aspects. Repeated-measures ANOVAs were used to determine the effects of time on the physiological measures and time motion analysis...
October 20, 2016: Journal of Sports Medicine and Physical Fitness
José L Chamorro, Miquel Torregrosa, David Sánchez Oliva, Tomás García Calvo, Benito León
Within the context of the transition from junior-to-senior sport, this study aims in first place to explore differences in young Spanish elite soccer players based on the importance given to getting different achievements in their future (including sport, studies and private life) and, in second place, to explore differences among those players in levels of passion, motivation and basic psychological need. 478 elite youth soccer filled out a questionnaire based on the presented theoretical models. A cluster analysis shows a sport oriented group (N = 98) only interested in becoming a professional, a life spheres balance group (N = 288) characterized by balancing the importance of achievements in the sport sphere, as well as in education and a private life and a group (N = 91) only interested in private life achievements...
October 20, 2016: Spanish Journal of Psychology
Noortje H Rijken, Remko Soer, Ewold de Maar, Hilco Prins, Wouter B Teeuw, Jan Peuscher, Frits G J Oosterveld
The aim of this pilot study was to investigate the effects of an intervention consisting of mental coaching combined with either electro encephalogram (EEG) alpha power feedback or heart rate variability (HRV) feedback on HRV, EEG outcomes and self-reported factors related to stress, performance, recovery and sleep quality in elite athletes. A prospective pilot study was performed with two distinct cohorts. Soccer players were provided with four sessions of mental coaching combined with daily HRV biofeedback (Group A); track and field athletes were provided with four sessions of mental coaching in combination with daily neurofeedback (Group B)...
October 19, 2016: Applied Psychophysiology and Biofeedback
David A Shearer, William Sparkes, Jonny Northeast, Daniel J Cunningham, Christian J Cook, Liam P Kilduff
OBJECTIVES: Biochemical (e.g. creatine kinase (CK)) and neuromuscular (e.g. peak power output (PPO)) markers of recovery are expensive and require specialist equipment. Perceptual measures are an effective alternative, yet most validated scales are too long for daily use. DESIGN: This study utilises a longitudinal multi-level design to test an adapted Brief Assessment of Mood (BAM+), with four extra items and a 100mm visual analogue scale to measure recovery. METHODS: Elite under-21 academy soccer players (N=11) were monitored across five games with data (BAM+, CK and PPO) collected for each game at 24h pre, 24h and 48h post-match...
October 5, 2016: Journal of Science and Medicine in Sport
Leo Djaoui, Karim Chamari, Adam Owen, Alexandre Dellal
The aim of the present study was to compare 1) the maximal sprinting speed (MSS) attained by soccer players during matches (MSSmatch) according to their level of play (professional 1st French division vs. elite amateur 4th French division) and the playing positions; and 2) the MSS attained by professional soccer players during 14 different types of small-sided games (SSG, MSSSSG) and match-play. All players monitored through the study performed a 40-m sprint test to assess individual MSS (MSStest) and compare it to the training and match activity, with the calculation of the percentage of MSStest (%MSStest) reached...
September 23, 2016: Journal of Strength and Conditioning Research
Harry T Mai, Robert J Burgmeier, Sean M Mitchell, Andrew C Hecht, Joseph C Maroon, Gordon W Nuber, Wellington K Hsu
STUDY DESIGN: Retrospective cohort study OBJECTIVE.: To determine if the level of a cervical disc herniation (CDH) procedure will uniquely impact performance-based outcomes in elite athletes of the National Football League (NFL). SUMMARY OF BACKGROUND DATA: Comparative assessments of post-surgical outcomes in NFL athletes with CDH at different levels are unknown. Further, the surgical decision making for these types of injuries in professional football athletes remains controversial...
September 30, 2016: Spine
A Prien, B Prinz, J Dvořák, A Junge
The aim of this study was to assess the prevalence of health problems and associated risk factors in former elite female football players. A cross-sectional research design was employed, using an online questionnaire on personal characteristics and health complaints during/after the career. One hundred fifty-two (response rate: 62.0%) former first German league players answered the survey. Around 70% described their current health as good or very good. Over half (57.9%) reported knee problems during the last 4 weeks while exercising and a third (33...
October 17, 2016: Scandinavian Journal of Medicine & Science in Sports
Antonio Miguel Cruz-Ferreira, Eduardo Miguel Cruz-Ferreira, Luiz Miguel Santiago, Luis Taborda Barata
OBJECTIVES: In 2016 the Rugby Union variant of sevens will enter the official Olympic Programme. Until now, most of injury surveillance studies in Rugby Union focus on elite 15-a-side cohorts, with reported injury incidence rates reaching 96 per 1000 player-match-hours, and mean severity set at 20 days. Sparse data is available regarding rugby sevens. The aim of this study was to systematically review available data regarding the epidemiology of injuries in senior male rugby sevens. METHODS: Electronic databases (Pubmed, Google Scholar, SCOPUS, Scielo and IndexRMP) were searched in September 2015, complemented by manual searches of bibliographies and relevant 'grey literature'...
October 14, 2016: Physician and Sportsmedicine
Stephanie A Kovalchik, Michael K Bane, Machar Reid
Official rankings are the most common measure of success in professional women's tennis. Despite their importance for earning potential and tournament seeding, little is known about ranking trajectories of female players and their influence on career success. Our objective was to conduct a comprehensive study of the career progression of elite female tennis talent. The study examined the ranking trajectories of the top 250 female professionals between 1990 and 2015. Using regression modelling of yearly peak rankings, we found a strong association between the shape of the ranking trajectory and the highest career ranking earned...
October 13, 2016: Journal of Sports Sciences
Jaroslaw Krzywanski, Tomasz Mikulski, Hubert Krysztofiak, Marcel Mlynczak, Ewa Gaczynska, Andrzej Ziemba
Vitamin D does not only influence the musculoskeletal health and mineral homeostasis but it also affects cardiovascular, endocrine, nervous, immune and mental functions, thus it is of considerable importance for both physically active people and elite athletes. However, vitamin D deficiency is common worldwide and results from inadequate endogenous skin synthesis (insufficient ultraviolet B exposure) and diet. To improve the vitamin D status elite athletes often travel to lower latitude during winter. The aim of the study was to evaluate the seasonal vitamin D status in Polish elite athletes according to the sun exposure and oral supplementation...
2016: PloS One
Moktar Chtara, Mehdi Rouissi, Nicola L Bragazzi, Adam L Owen, Monoem Haddad, Karim Chamari
BACKGROUND: Soccer requires maintaining unilateral balance when executing movement with the contralateral leg. Despite the fact that balance requires standing with maintaining isometric posture with the support leg, currently there is a lack of studies regarding the implication of isometric strength on dynamic balance's performance among young soccer players. Therefore, the aim of this study was to examine the relationship between the Y- balance test and 12 lower limbs isometric strength tests...
October 11, 2016: Journal of Sports Medicine and Physical Fitness
Matthew Tredrea, Ben Dascombe, Colin E Sanctuary, Aaron Terrence Scanlan
This study aimed to identify attributes that discriminate selected from non-selected players and predict selection into a rugby league development programme in older adolescent players. Anthropometric, performance and psychological attributes were measured in under-16 (N = 100) and under-18 (N = 60) rugby league players trialling for selection into a development programme with a professional Australian club. Sprint times (P < 0.001), predicted VO2max (P = 0.002) and push-ups1 min (P = 0.004) were superior in selected under-16 players, and sprint times (P ≤ 0...
October 11, 2016: Journal of Sports Sciences
Gregory J Tierney, John Lawler, Karl Denvir, Kurt McQuilkin, Ciaran K Simms
PRIMARY OBJECTIVES: To conduct video and statistical analysis on Rugby Union play, focusing mainly on the tackle, to establish the player to player configurations for significant direct head impacts and non-direct head impacts. RESEARCH DESIGN: Quantitative, observational cohort study. METHODS AND PROCEDURES: Video analysis of 52 significant direct head impacts (31 Tackle, 10 Ruck, 7 Dive and 4 Ground) and 40 non-direct head impact tackles from 2014/15 International Rugby Union matches...
August 11, 2016: Brain Injury: [BI]
Brooke L Devlin, Michael D Leveritt, Michael Kingsley, Regina Belski
Sports nutrition professionals aim to influence nutrition knowledge, dietary intake and body composition to improve athletic performance. Understanding the interrelationships between these factors and how they vary across sports has the potential to facilitate better-informed and targeted sports nutrition practice. This observational study assessed body composition (DXA), dietary intake (multiple-pass 24-hour recall) and nutrition knowledge (two previously validated tools) of elite and sub-elite male players involved in two team-based sports; Australian football (AF) and soccer...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
I Loturco, F Y Nakamura, R Kobal, S Gil, B Pivetti, L A Pereira, H Roschel
It is unknown whether traditional periodization of strength-power training involving accumulation, transformation and realization blocks is superior to other simpler and more practical training schemes. The purpose of this study was thus to investigate changes in strength/power/speed characteristics of elite soccer players in response to either classic strength-power periodization (TSP) or optimum power load (OPL). 23 professional soccer players were randomly assigned to TSP or OPL for 6 weeks in-season regular training (3 times per week)...
October 5, 2016: International Journal of Sports Medicine
Tamara Kramer, Barbara Ch Huijgen, Marije T Elferink-Gemser, Chris Visscher
PURPOSE: To analyze how physical fitness (PF) improves in elite junior tennis players related to age, maturity, and performance level. METHODS: Elite junior tennis players (n=113 boys, n=83 girls) divided by performance level were monitored longitudinally from U14 to U16. Maturity, upper and lower body power, speed, and agility were measured during subsequent competitive seasons. Improvement was analyzed per sex using multilevel analysis. RESULTS: PF components for boys and girls improved over age (U14-U16) (ES ...
October 5, 2016: Pediatric Exercise Science
A Dello Iacono, A Eliakim, J Padulo, L Laver, S Ben-Zaken, Y Meckel
The aim of this study was to investigate the influence of physical contact on neuromuscular impairments and inflammatory response during handball small-sided games. Using a counterbalanced design, 12 elite male junior handball players were divided into two groups: contact (C-SSG) and no-contact (NC-SSG), performing both contact and no-contact small-sided games, in reverse order on two training sessions separated by 5 days. The methodology and rules were identical for the two SSG regimens, with the only difference being the inclusion or prohibition of upper body use for physical contacts...
September 30, 2016: Scandinavian Journal of Medicine & Science in Sports
Christian Haser, Thomas Stöggl, Monika Kriner, Jörg Mikoleit, Bernd Wolfahrt, Johannes Scherr, Martin Halle, Florian Pfab
PURPOSE: Increase in muscle force, endurance and flexibility is desired in elite athletes in order to improve performance and avoid injuries but often hindered by occurence of myofascial trigger points. Dry needling (DN) has been shown effective in eliminating myofascial trigger points. METHODS: This randomized controlled study in 30 elite youth soccer players of a professional soccer Bundesliga Club investigated the effects of four weekly sessions of DN plus water-pressure-massage on thigh muscle force and range-of-motion of hip flexion...
September 28, 2016: Medicine and Science in Sports and Exercise
Gui Tran, Toby O Smith, Adam Grice, Sarah R Kingsbury, Paul McCrory, Philip G Conaghan
BACKGROUND: To assess the relationship between sport and osteoarthritis (OA), and specifically to determine whether previous participation, in terms of level (elite or non-elite), type of sport, intensity or previous injury, was associated with OA. METHODS: This systematic review was developed using PRISMA guidelines. Databases were searched (to May 2016). Narrative review and meta-analysis (with risk ratio (RR) and 95% CIs) approaches were undertaken where appropriate...
September 28, 2016: British Journal of Sports Medicine
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