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https://www.readbyqxmd.com/read/29772188/hamstring-and-ankle-flexibility-deficits-are-weak-risk-factors-for-hamstring-injury-in-professional-soccer-players-a-prospective-cohort-study-of-438-players-including-78-injuries
#1
Nicol van Dyk, Abdulaziz Farooq, Roald Bahr, Erik Witvrouw
BACKGROUND: Hamstring injuries remain a significant injury burden in sports such as soccer that involve high-speed running. It has repeatedly been identified as the most common noncontact injury in elite male soccer, representing 12% of all injuries. As the incidence of hamstring injuries remains high, investigations are aimed at better understanding how to prevent hamstring injuries. Stretching to improve flexibility is commonly used in elite-level sports, but risk factor studies have reported contradicting results, leading to unclear conclusions regarding flexibility as a risk factor for hamstring injuries...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29770341/knowledge-attitudes-and-beliefs-of-youth-club-athletes-toward-sport-specialization-and-sport-participation
#2
M Alison Brooks, Eric G Post, Stephanie M Trigsted, Daniel A Schaefer, Daniel M Wichman, Andrew M Watson, Timothy A McGuine, David R Bell
Background: There are a variety of proposed motivations for sport specialization, such as improving sport skills to an elite level, making all-star or travel teams, or receiving a scholarship or professional contract. However, there has not been a quantitative examination of the attitudes and beliefs that may be contributing to the trend of sport specialization and year-round sport participation. Purpose: The primary aim was to describe the attitudes and beliefs of youth club sport athletes regarding sport specialization and sport participation...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29757049/prevalence-of-indicators-of-low-energy-availability-in-elite-female-sprinters
#3
Jennifer Sygo, Alexandra M Coates, Erik Sesbreno, Margo L Mountjoy, Jamie F Burr
Low energy availability (LEA), and subsequent relative energy deficiency in sport (RED-S), has been observed in endurance, aesthetic, and team sport athletes, with limited data on prevalence in athletes in short-burst activities such as sprinting. We examined prevalence of signs and symptoms of LEA in elite female sprinters at the start of the training season (PRE), and at the end of a 5-month indoor training period (POST). Four of 13 female sprinters (31%) presented at PRE testing with at least one primary (amenorrhea, low BMD, low FSH, LH, or estradiol, RMR ≤ 29kcal/kg FFM, Low Energy Availability in Females Questionnaire (LEAF-Q) score ≥8) and one secondary indicator of LEA (fasting blood glucose < 4mmol/L, free triiodothyronine < 3...
May 14, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29745738/effect-of-prior-fatiguing-sport-specific-exercise-on-field-hockey-passing-ability
#4
Enzo Hollville, Vincent Le Croller, Yoshihiro Hirasawa, Rémi Husson, Giuseppe Rabita, Franck Brocherie
PURPOSE: This study aimed to evaluate the effect of multiple sets of repeated-sprint ability (RSA) induced fatigue on subsequent passing skill performance among field hockey. METHODS: Ten elite U-21 male field hockey players performed five sets of a combination of RSA test (6 × 20 m - 20 s of passive recovery) followed by a 1-min passing skill test (passing reception with subsequent passes at a pre-designed target). Fastest sprint time and cumulated sprint time for RSA test; total number of balls played, targeted and passing accuracy (number of balls targeted / total number of balls played) for passing skill test; heart rate (HR), blood lactate concentration ([La-]) and rating of perceived exertion (RPE) were collected throughout the protocol...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745735/time-trial-performance-in-elite-speed-skaters-after-remote-ischemic-preconditioning
#5
Philippe Richard, François Billaut
PURPOSE: Speed skating leads to blood-flow restriction and deoxygenation in the lower limbs (especially the right leg) that may affect performance. Although the acute influence of such deoxygenation is not clearly understood, we tested whether remote ischemic preconditioning (RIPC) could modify muscular oxygenation and improve time-trial performance in that sport. METHODS: Using a randomized, single-blind, placebo-controlled, crossover design, 9 elite speed skaters performed 1000-m on-ice time-trials preceded by either RIPC of the upper limbs (3x5-min compression/5-min reperfusion cycles at 30 mmHg > arterial systolic pressure) or SHAM (10 mmHg)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29741443/the-effect-of-individualised-sprint-training-in-elite-female-team-sport-athletes-a-pilot-study
#6
Elvir Rakovic, Gøran Paulsen, Christian Helland, Ola Eriksrud, Thomas Haugen
This study aimed to evaluate whether an individualised sprint-training program was more effective in improving sprint performance in elite team-sport players compared to a generalised sprint-training program. Seventeen elite female handball players (23 ± 3 y, 177 ± 7 cm, 73 ± 6 kg) performed two weekly sprint training sessions over eight weeks in addition to their regular handball practice. An individualised training group (ITG, n = 9) performed a targeted sprint-training program based on their horizontal force-velocity profile from the pre-training test...
May 9, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29739301/sub-elite-football-players-with-hip-related-groin-pain-and-positive-flexion-adduction-internal-rotation-test-exhibit-distinct-biomechanical-differences-compared-with-the-asymptomatic-side
#7
Matthew G King, Adam I Semciw, Harvi F Hart, Anthony G Schache, Kane J Middleton, Josh J Heerey, Rintje Agricola, Kay M Crossley
Study Design Observational cross-sectional study. Background Hip-related groin pain is common in sub-elite football players and may be associated with altered hip biomechanics. Objectives To compare the hip biomechanics, bony hip morphology associated with femoroacetabular impingement (FAI) syndrome, and hip strength and range of motion between the symptomatic and asymptomatic limb of sub-elite football players with unilateral hip-related groin pain and a positive flexion adduction internal rotation test. Methods Fifteen sub-elite football (soccer) players with unilateral hip-related groin pain and a positive flexion adduction internal rotation test were recruited...
May 8, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29734326/-vaccines-and-sport-risk-perception-among-athletes
#8
Elisa Terracciano, Matteo Iachini, Laura Zaratti, Elisabetta Franco
Infection prevention is a key issue in both general population and in categories at risk, among which the athletes. There are risk factors related to the sporting practice performed at every level, from the amateur to the elite athletes. The control of the vaccination schedule and the empowerment of the sportsman in this area should be carried out both by the General Practitioner or the Pediatrician and by the federations to which the athletes belong. There is a need for guidelines and it is necessary to inform the athletes...
January 2018: Igiene e Sanità Pubblica
https://www.readbyqxmd.com/read/29730745/the-heart-of-the-matter-years-saved-from-cardiovascular-and-cancer-deaths-in-an-elite-athlete-cohort-with-over-a-century-of-follow-up
#9
Juliana Antero-Jacquemin, Maja Pohar-Perme, Grégoire Rey, Jean-François Toussaint, Aurélien Latouche
To quantify the years of life saved from cardiovascular (CVD), cancer and overall deaths among elite athletes according to their main type of physiological effort performed in the Olympic Games. All French athletes participating in the Games from 1912 to 2012, with vital status validated and cause of death (if concerned) identified by the national registries were included (n = 2814, 455 died) and classified according to 6 groups of effort: POWER (continuous effort < 45 s); INTERMEDIATE (45 s ≤ continuous effort < 600 s); ENDURANCE (continuous effort ≥ 600 s); POLYVALENT (participating in different events entering different classifications), INTERMITTENT (intermittent effort, i...
May 5, 2018: European Journal of Epidemiology
https://www.readbyqxmd.com/read/29723296/longevity-of-outstanding-sporting-achievers-mind-versus-muscle
#10
An Tran-Duy, David C Smerdon, Philip M Clarke
BACKGROUND: While there is strong evidence showing the survival advantage of elite athletes, much less is known about those engaged in mind sports such as chess. This study aimed to examine the overall as well as regional survival of International Chess Grandmasters (GMs) with a reference to the general population, and compare relative survival (RS) of GMs with that of Olympic medallists (OMs). METHODS: Information on 1,208 GMs and 15,157 OMs, respectively, from 28 countries were extracted from the publicly available data sources...
2018: PloS One
https://www.readbyqxmd.com/read/29722586/australian-football-athletes-lack-awareness-of-current-sport-nutrition-guidelines
#11
Gina Louise Trakman, Adrienne Forsyth, Kane Middleton, Russell Hoye, Sarah Jenner, Stephen Keenan, Regina Belski
Sports nutrition is an evolving field, but there is a lack of data on Australian athletes' knowledge of current sports nutrition guidelines. Additionally, several tools used to assess nutrition knowledge (NK) have not undergone adequate validation. The purpose of this study was to assess and compare the sports NK of elite and non-elite Australian Football (AF) athletes using a newly validated questionnaire-The Nutrition for Sport Knowledge Questionnaire (NSKQ). Elite AF players (n=46) were recruited directly from their club dietitian and non-elite AF players (n =53) were invited to participate via email from their club president or secretary...
May 3, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29722250/the-effects-of-8-weeks-of-two-different-training-methods-on-on-sight-lead-climbing-performance
#12
Marc Philippe, Ingo Filzwieser, Veronika Leichtfried, Cornelia Blank, Simon Haslinger, Johannes Fleckenstein, Wolfgang Schobersberger
BACKGROUND: Despite climbing being an increasingly popular sporting pursuit, there have been very few scientific evaluations of appropriate training methods for competitive climbers. The aim of this study was to investigate the effects of an 8-week climbing-specific muscular hypertrophy (MH) or muscular endurance (ME) resistance training program on the on-sight lead climbing performance in a similar setting to a world cup. METHODS: Twenty-three elite male and female climbers (age: 25...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29721459/differences-between-the-sexes-in-athletes-body-composition-and-lower-limb-bioimpedance-values
#13
Gabriele Mascherini, Jorge Castizo-Olier, Alfredo Irurtia, Cristian Petri, Giorgio Galanti
Introduction: The differences between the sexes in body composition are well established, although sports activity at an elite level seems to reduce them. The aim of this study is a comparison of the sexes in terms of athletes' body composition with a three-compartment model and a localized bioimpedance analysis in elite soccer players. Methods: 18 female and 18 male elite soccer players of the same age were matched (female=26.2±2.4, male 26.9±2.5; p=0.87). An assessment of body composition was performed through the integration of anthropometrics parameters, skinfold thickness and bioimpedance data...
October 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/29719725/the-incidence-of-injury-in-elite-camogie-an-in-season-prospective-study
#14
Catherine Susan Buckley, Catherine Blake
Background: Camogie is a stickhandling, high-velocity, multidirectional field sport for females which is native to Ireland, but is also played internationally. Aim: To establish the incidence, nature and severity of injuries in elite camogie players. Methods: A prospective, observational cohort study was carried out during the Provincial Championships and extending into the All-Ireland Championship until a participating team was eliminated (11 weeks)...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29713248/development-and-validation-of-a-brief-general-and-sports-nutrition-knowledge-questionnaire-and-assessment-of-athletes-nutrition-knowledge
#15
Gina Louise Trakman, Adrienne Forsyth, Russell Hoye, Regina Belski
Background: The Nutrition for Sport Knowledge Questionnaire (NSKQ) is an 89-item, valid and reliable measure of sports nutrition knowledge (SNK). It takes 25 min to complete and has been subject to low completion and response rates. The aim of this study was to develop an abridged version of the NSKQ (A-NSKQ) and compare response rates, completion rates and NK scores of the NSKQ and A-NSKQ. Methods: Rasch analysis was used for the questionnaire validation. The sample ( n  = 181) was the same sample that was used in the validation of the full-length NSKQ...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29707231/preventing-lower-extremity-injury-in-elite-orienteerers-study-protocol-for-a-randomised-controlled-trial
#16
Philip von Rosen, Bodil Halvarsson
Background: The high physical load associated with running through uneven terrain contributes toorienteerers being exposed to high injury risk, where the majority of injuries are located in the lower extremities. Specific training programmes have been effective at reducing injury risk in sports. Yet no trial has been conducted in elite orienteering. The aim of this study is to investigate the effectiveness of a specific training programme in preventing lower extremity injury in adult elite orienteerers...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29704189/periodic-health-examination-and-injury-prediction-in-professional-football-soccer-theoretically-the-prognosis-is-good
#17
Tom Hughes, Jamie C Sergeant, Danielle A van der Windt, Richard Riley, Michael J Callaghan
In professional soccer and other elite sports, medical and performance screening of athletes (also termed periodic health examination or PHE) is common practice. The purposes of this are: (1) to assist in identifying prevalent conditions that may be a threat to safe participation, (2) to assist in setting benchmark targets for rehabilitation or performance purposes and (3) to assist clinicians in determining which athletes may be at risk of future injury and selecting appropriate injury prevention strategies to reduce the perceived risk...
April 27, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29701639/energy-deficit-required-for-rapid-weight-loss-in-elite-collegiate-wrestlers
#18
Emi Kondo, Hiroyuki Sagayama, Yosuke Yamada, Keisuke Shiose, Takuya Osawa, Keiko Motonaga, Shiori Ouchi, Akiko Kamei, Kohei Nakajima, Yasuki Higaki, Hiroaki Tanaka, Hideyuki Takahashi, Koji Okamura
To determine energy density for rapid weight loss (RWL) of weight-classified sports, eight male elite wrestlers were instructed to lose 6% of body mass (BM) within 53 h. Energy deficit during the RWL was calculated by subtracting total energy expenditure (TEE) determined using the doubly labeled water method (DLW) from energy intake (EI) assessed with diet records. It was also estimated from body composition change estimated with the four-component model (4C) and other conventional methods. BM decreased significantly by 4...
April 26, 2018: Nutrients
https://www.readbyqxmd.com/read/29701116/distinct-trajectories-of-athlete-development-a-retrospective-analysis-of-professional-rugby-league-players
#19
Balin Cupples, Donna O'Connor, Stephen Cobley
Contemporary models of athlete development (e.g., Development Model of Sport Participation) suggest attainment benefits from early age multi-sport "sampling" behaviour before progressive transition into "invested" single-sport involvement in teenage years compared to intensive early-age specialisation. However, specific examinations of these development patterns across a number of team sports and cultural contexts remains limited. This study involved a large sample of professional Australian Rugby League (RL) players (N = 224) who progressed along the RL system pathways...
April 27, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29694677/interseason-variability-in-isokinetic-strength-and-poor-correlation-with-nordic-hamstring-eccentric-strength-in-football-players
#20
Nicol van Dyk, Erik Witvrouw, Roald Bahr
INTRODUCTION: In elite sport, the use of strength testing to establish muscle function and performance is common. Traditionally, isokinetic strength tests have been used, measuring torque during concentric and eccentric muscle action. A device that measures eccentric hamstring muscle strength while performing the Nordic hamstring exercise is now also frequently used. The study aims to investigate the variability of isokinetic muscle strength over time, e.g. between seasons, and the relationship between isokinetic testing and the new Nordic hamstring exercise device...
April 25, 2018: Scandinavian Journal of Medicine & Science in Sports
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