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https://www.readbyqxmd.com/read/29216703/-effect-of-sports-training-in-angular-compartment-of-the-lower-limbs-in-children-footballers-aged-11-to-12-years-old
#1
J Burboa, M Bahamonde, M Inostroza, P Lillo, M Barahona, M Palet, J Hinzpeter
Anterior Cruciate Ligament (ACL) injury is an important cause of days lost in athletes. Most ACL injuries are non-contact and are associated with biomechanical risk factors that increase tension in the ACL: increased knee valgus (KV) and hip flexion (HF) and decreased flexion of knee (KF). Muscle around the knee contributes to knee stability, so fatigue produced by exercise could alter knee balance, increasing LCA tension. The aim of the study is to determine the angular behavior before and after a physical load for CF, RR and RV in children born in 2002-2003...
May 2017: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/29214194/data-concerning-the-effect-of-plyometric-training-on-jump-performance-in-soccer-players-a-meta-analysis
#2
Maamer Slimani, Armin Paravlić, Nicola Luigi Bragazzi
Plyometric training (PT) enhances soccer performance, particularly vertical jump. However, the effectiveness of PT depends on various factors. A systematic search of the research literature was conducted for randomized controlled trials (RCTs) studying the effects of PT on countermovement jump (CMJ) height in soccer players. Ten studies were obtained through manual and electronic journal searches (up to April 2017). Significant differences were observed when compared: (1) PT group vs. control group (ES=0.85; 95% CI 0...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29210958/the-reliability-and-validity-of-a-submaximal-warm-up-test-for-monitoring-training-status-in-professional-soccer-players
#3
Alireza Rabbani, Mehdi Kargarfard, Craig Twist
Two studies were conducted to assess the reliability and validity of a submaximal warm-up test (SWT) in professional soccer players. For the reliability study, 12 male players performed SWT over three trials, with one week between trials. For the validity study, 14 players of the same team performed SWT and 30-15 Intermittent Fitness Test (30-15IFT) 7 days apart. Week-to-week reliability in selected heart rate (HR) responses [exercise HR (HRex), HR recovery (HRR) expressed as the number of beats recovered within 1 min (HRR60s) and expressed as the mean HR during 1 min (HRpost1)], were determined using intraclass correlation coefficient (ICC) and typical error of measurement expressed as coefficient of variation (CV)...
November 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29199782/anthropometric-and-physiological-characteristics-of-male-soccer-players-according-to-their-competitive-level-playing-position-and-age-group-a-systematic-review
#4
Maamer Slimani, Pantelis T Nikolaidis
BACKGROUND: The aim of the present systematic review was to profile soccer players' anthropometric, physiological, and physical attributes relative to different competitive levels, playing positions and age groups. METHODS: The systematic search was conducted using different databases and according to the Population/Intervention or Exposure/Comparison/Outcome(s) [PICO] criteria. RESULTS: The present review shows that the somatotype characteristics, percentage (%) of body fat, maximal oxygen uptake (VO2max), repeatedsprint ability (RSA), running speed, strength, and muscular power of the lower limbs were the most powerful discriminators between male soccer players of different competitive levels, playing positions, and age groups...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29194185/does-maturity-status-affect-the-relationship-between-anaerobic-speed-reserve-and-multiple-sprints-sets-performance-in-young-soccer-players
#5
Mohamed Amin Selmi, Badriya Al-Haddabi, Mohamed Haj Yahmed, Radhouane Haj Sassi
The purpose of this study is to examine the relationship between repeated-sprint sets (RSS) performance indices and anaerobic speed reserve (ASR) in young soccer players of different maturity status. One hundred and seventy nine young male soccer players (11.1 to 17.8 years) classified as pre- (n=50), circum- (n=60), or post- (n=69) peak height velocity (PHV) performed multi-stage shuttle run test (MRST) to measure maximal aerobic speed (MAS), 30-m sprint with 10-m splits to estimate maximal anaerobic speed (MAnS), and RSS test...
November 29, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29194184/biomechanical-comparison-of-loaded-countermovement-jumps-performed-on-land-and-in-water
#6
Talin Louder, Eadric Bressel, Clint Nardoni, Dennis Dolny
Researchers have observed physical improvements following the completion of aquatic-based jump training. However, there is a lack of research on the biomechanical specificity of aquatic-based movement. Therefore, the purpose of this investigation was to evaluate the kinetics and kinematics of loaded countermovement jumps performed in water versus land. Twenty young males and twenty-four NCAA division I women's soccer and gymnastics athletes were asked to perform unloaded and loaded countermovement jumps on land and in chest-deep water immersion...
November 29, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29189582/aerobic-fitness-in-top-class-soccer-referees
#7
Carlo Castagna, Mario Bizzini, Susana C Araújo Póvoas, Kai Schenk, Gery Büsser, Stefano DʼOttavio
Castagna, C, Bizzini, M, Araújo Póvoas, SC, Schenk, K, Büsser, G, and D'Ottavio, S. Aerobic fitness in top-class soccer referees. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to examine the aerobic fitness status of top-class male soccer officials using a cross-sectional design and known population group constructs. Fifty-two field referees (FRs, age 38.4 ± 3.3 years; height 181 ± 5.6 cm; body mass 76.8 ± 6.8 kg; body mass index [BMI] 23.4 ± 1.7 kg·m; body fat 20.4 ± 3.6%; and international refereeing experience 5 ± 3...
November 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29184275/effects-of-lower-extremity-injuries-on-aerobic-exercise-capacity-anaerobic-power-and-knee-isokinetic-muscular-function-in-high-school-soccer-players
#8
Kwang-Jun Ko, Gi-Chul Ha, Dong-Woo Kim, Seol-Jung Kang
[Purpose] The study investigated the effects of lower extremity injuries on aerobic exercise capacity, anaerobic power, and knee isokinetic muscular function in high school soccer players. [Subjects and Methods] The study assessed U High School soccer players (n=40) in S area, South Korea, divided into 2 groups: a lower extremity injury group (n=16) comprising those with knee and ankle injuries and a control group (n=24) without injury. Aerobic exercise capacity, anaerobic power, and knee isokinetic muscular function were compared and analyzed...
October 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29182417/seasonal-training-load-and-wellness-monitoring-in-a-professional-soccer-goalkeeper
#9
James J Malone, Arne Jaspers, Werner F Helsen, Brenda Merks, Wouter Gp Frencken, Michel S Brink
The purpose of this investigation was to: (a) quantify the training load practices of a professional soccer GK, and (b) investigate the relationship between the training load observed and the subsequent self-reported wellness response. One male goalkeeper playing for a team in the top league of the Netherlands participated in this case study. Training load data were collected across a full season using a global positioning system (GPS) device and session rating of perceived exertion (session-RPE). Data was assessed in relation to the number of days to a match (MD- and MD+)...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29177074/prognostic-factors-for-specific-lower-extremity-and-spinal-musculoskeletal-injuries-identified-through-medical-screening-and-training-load-monitoring-in-professional-football-soccer-a-systematic-review
#10
Tom Hughes, Jamie C Sergeant, Matthew J Parkes, Michael J Callaghan
Background: Medical screening and load monitoring procedures are commonly used in professional football to assess factors perceived to be associated with injury. Objectives: To identify prognostic factors (PFs) and models for lower extremity and spinal musculoskeletal injuries in professional/elite football players from medical screening and training load monitoring processes. Methods: The MEDLINE, AMED, EMBASE, CINAHL Plus, SPORTDiscus and PubMed electronic bibliographic databases were searched (from inception to January 2017)...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29176387/effects-of-plyometric-and-directional-training-on-speed-and-jump-performance-in-elite-youth-soccer-players
#11
Marco Beato, Mattia Bianchi, Giuseppe Coratella, Michele Merlini, Barry Drust
Soccer players perform approximately 1350 activities (every 4-6 s), such as accelerations/decelerations, and changes of direction (COD) during matches. It is well established that COD and plyometric training have a positive impact on fitness parameters in football players. This study analyzed the effect of a complex COD and plyometric protocol (CODJ-G) compared to an isolated COD protocol (COD-G) training on elite football players.A randomized pre-post parallel group trial was used in this study. Twenty-one youth players were enrolled in this study (mean ± SDs; age 17 ± 0...
November 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29165725/somatotrope-pituitary-function-in-professional-soccer-players
#12
Pia Roser, Tatiana Wehrhahn, Henry Krogmann, Nina Riedel, Robert Percy Marshall, Justus Gille, Jörg Flitsch, Jens Aberle
Background and objective Soccer is associated with repetitive head trauma, which, as it is known from sports like football and boxing, can result in hypopituitarism. Gonadotropins and GH are the most common pituitary hormones to become deficient. GH deficiency is associated with an increased risk of cardiovascular mortality and has negative influence on body mass index, visceral fat mass, insulin resistance and sensitivity, bone mineral density and inflammatory markers. Therefore the aim of this study was to evaluate the somatotrope pituitary function in professional soccer players...
November 17, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/29158613/blood-pressure-heart-rate-and-perceived-enjoyment-after-small-sided-soccer-games-and-repeated-sprint-in-untrained-healthy-adolescents
#13
Amri Hammami, Sofien Kasmi, Paulo Farinatti, Taieb Fgiri, Karim Chamari, Ezdine Bouhlel
The purpose of this study was to examine systolic (SBP) and diastolic blood pressure (DBP), heart rate (HR), rating of perceived exertion (RPE) and perceived enjoyment responses to a repeated-sprint training session (RST) compared to a small-sided soccer game session (SSG) in untrained adolescents. Twelve healthy post-pubertal adolescent males (age 15.8±0.6 years, body mass 59.1±3.7 kg, height 1.7±0.1m) performed RST and SSG sessions in a randomized and counterbalanced order. Blood pressure and HR were measured at rest and at 10, 20 and 30 minutes after interventions, and RPE and enjoyment were assessed...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29150270/m-biceps-femoris-a-wolf-in-sheep-s-clothing-the-downside-of-a-lower-limb-injury-prevention-training
#14
Thomas Ertelt, Thomas Gronwald
Both, hamstring and ACL injuries are among the most typical injuries, particularly in change of direction and high speed running sports. They're also difficult to treat. Therefore, in the past few years, sports medicine practitioners and exercise scientists have mainly been focusing on the development and implementation of preventive programs in order to reduce the number of lower limb injuries, mainly by improving knee alignment. A number of studies have been able to prove the success of these training interventions, which are mainly addressing sensorimotor abilities and plyometric activities...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29140913/sex-differences-in-aerobic-fitness-in-top-class-soccer-referees
#15
Carlo Castagna, Mario Bizzini, Stefano DʼOttavio, Susana C Araújo Póvoas
Castagna, C, Bizzini, M, D'Ottavio, S, and Araújo Póvoas, SC. Gender differences in aerobic fitness in top-class soccer referees. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to assess the aerobic-fitness differences between male and female top-class soccer field referees (FRs). This with the purpose to provide cutoff values useful for training prescription in female FRs. Forty female top-class FRs (age 34.18 ± 3.50 years and 5 ± 3.9 years international refereeing experience) and 52 male FRs (age 38...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29134052/effects-of-an-interpersonal-style-intervention-for-coaches-on-young-soccer-players-motivational-processes
#16
Juan J Pulido, David Sánchez-Oliva, Francisco M Leo, Sergio Matos, Tomás García-Calvo
The main goal of the study was to assess the effects of an intervention programme developed with soccer coaches, based on promoting strategies to optimise the satisfaction of the basic psychological needs of athletes. Eight soccer coaches, aged between 19 and 50 years (M = 32.5; SD = 14.34), participated in the study. They were selected intentionally (without academic or federative training) and divided equally into a control and an experimental group by random peer selection. Also, 109 soccer players, aged between 11 and 15 years (M = 13...
October 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29134051/does-context-practice-or-competition-affect-female-athletes-achievement-goal-dominance-goal-pursuit-burnout-and-motivation
#17
Javier Fernández-Rio, Jose A Cecchini, Antonio Méndez-Giménez
The goal of this study was to assess the effects of two different achievement sport contexts, practice and competition, on the motivational profile of professional/semi-professional athletes. Forty-eight Spanish national/international-level female athletes (basketball = 18; handball = 12; soccer = 11; volleyball = 7), mean age 25.14 ± 3.43 years, agreed to participate in the study. They completed a questionnaire, prior and after training and competition, to assess achievement goals, achievement goal dominance, goal pursuit, motivational climate, motivation, burnout and perceived recovery-exertion...
October 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29134050/mental-strategies-predict-performance-and-satisfaction-with-performance-among-soccer-players
#18
Magdalena Kruk, Jan Blecharz, Monika Boberska, Karolina Zarychta, Aleksandra Luszczynska
This study investigated the changes in mental strategies across the season and their effects on performance and satisfaction with individual performance. Data were collected three times: at the pre-season at Time 1 (T1; baseline), in the mid-season at Time 2 (T2; two-month follow-up), and at the end-of-season at Time 3 (T3; nine-month follow-up) among male soccer players (N = 97) aged 16-27. Athletes completed the questionnaires assessing the use of nine psychological strategies in competition and the level of satisfaction with individual performance...
October 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29125037/an-audit-of-injuries-in-six-english-professional-soccer-academies
#19
Paul J Read, Jon L Oliver, Mark B A De Ste Croix, Gregory D Myer, Rhodri S Lloyd
Regulations now state that professional academies in the United Kingdom are required to substantially increase the volume of soccer training. This study assessed the current injury occurrence, providing an update to reports published prior to the introduction of the Elite Player Performance Plan (EPPP). 608 soccer players aged 11-18 years from six professional soccer clubs were prospectively monitored, recording injuries during the 2014-2015 season. An injury rate of 1.32 injuries per player/season was indicated with a mean time loss of 21...
November 10, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29125029/match-derived-relative-pitch-area-changes-the-physical-and-team-tactical-performance-of-elite-soccer-players-in-small-sided-soccer-games
#20
Sigrid B H Olthof, Wouter G P Frencken, Koen A P M Lemmink
Small-sided games (SSGs) are used in training sessions to prepare for full-sized matches. For the same number of players, smaller pitch sizes result in decreased physical performance and shorter interpersonal distances. A relative pitch area derived from the full-sized match results in larger pitch sizes and this may increase the fit between SSGs and full-sized matches. This study aimed to investigate SSGs with a traditional small pitch and a match-derived relative pitch area in youth elite soccer players. Four age categories (under-13, under-15, under-17 and under-19) played 4 vs...
November 10, 2017: Journal of Sports Sciences
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