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https://www.readbyqxmd.com/read/29339992/effects-of-passive-and-active-rest-on-physiological-responses-and-time-motion-characteristics-in-different-small-sided-soccer-games
#1
Ersan Arslan, Utku Alemdaroglu, Yusuf Koklu, Tahir Hazir, Surhat Muniroglu, Baris Karakoc
The purpose of this study was to investigate the effects of resting regimes on physiological responses and time motion characteristics between bouts during small sided games (SSGs) in young soccer players. Sixteen players (average age 16.87 ± 0.34 years; body height 176.69 ± 3.21 cm; body mass 62.40 ± 2.59 kg; training experience 3.75 ± 0.44 years) performed four bouts 2-a-side, 3-a-side and 4-a-side games with three minutes active (SSGar: Running at 70% of HRmax) and passive (SSGpr) rest between bouts at two-day intervals...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339991/multivariate-profiles-of-selected-versus-non-selected-elite-youth-brazilian-soccer-players
#2
Rodrigo Aquino, Isabella S Alves, Maickel B Padilha, Filipe Casanova, Enrico F Puggina, José Maia
This study determined whether a multivariate profile more effectively discriminated selected than non-selected elite youth Brazilian soccer players. This examination was carried out on 66 youth soccer players (selected, n = 28, mean age 16.3 ± 0.1; non-selected, n = 38, mean age 16.7 ± 0.4) using objective instruments. Multivariate profiles were assessed through anthropometric characteristics, biological maturation, tactical-technical skills, and motor performance. The Student's t-test identified that selected players exhibited significantly higher values for height (t = 2...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339987/physiological-demands-morphological-characteristics-physical-abilities-and-injuries-of-female-soccer-players
#3
Zoran Milanović, Goran Sporiš, Nic James, Nebojša Trajković, Aleksandar Ignjatović, Hugo Sarmento, Athos Trecroci, Bruno Miguel Borges Mendes
The popularity of female soccer is increasing as well as the number of females playing soccer. Similarly, over the last twenty or so years, research in soccer has increased significantly, but a large disparity exists in the volume of studies involving male and female players. As a consequence of this, female players remain less well understood compared to males. The purpose of the present narrative review was to describe morphological characteristics, physiological demands, physical abilities and injuries in female soccer players...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29334309/effects-of-resisted-sprint-training-on-sprinting-ability-and-change-of-direction-speed-in-professional-soccer-players
#4
Saulo Gil, Renato Barroso, Everton Crivoi do Carmo, Irineu Loturco, Ronaldo Kobal, Valmor Tricoli, Carlos Ugrinowitsch, Hamilton Roschel
Resisted sprint training consists of performing overloaded sprints, which may produce greater effects than traditional sprint training. We compared a resisted sprint training with overload control versus an unresisted sprint training program on performance in soccer players. Eighteen elite athletes were randomly assigned to resisted (RST) or unresisted sprint training protocol (UR). Before and after a 6-week training period, sprinting ability, change of direction speed (COD), vertical jumps (SJ and CMJ), mean power (MP) and mean propulsive power (MPP) at distinct loads were assessed...
January 15, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29303362/the-demands-of-amputee-soccer-impair-muscular-endurance-and-power-indices-but-not-match-physical-performance
#5
Mário A M Simim, Gustavo R da Mota, Moacir Marocolo, Bruno V C da Silva, Marco Túlio de Mello, Paul S Bradley
We investigated the match demands (distances covered and acute physiological responses) of amputee soccer and its impact on muscular endurance and power. Measures such as heart rate, blood lactate concentration, subjective rating of perceived exertion, and time-motion characteristics were recorded in 16 Brazilian amputee soccer players during matches. Before and after matches, players completed a battery of tests: push-ups, countermovement vertical jump performance, and medicine ball throwing. Small differences were found between the first and second half for the distance covered in total and across various speed categories...
January 5, 2018: Adapted Physical Activity Quarterly: APAQ
https://www.readbyqxmd.com/read/29283689/physiological-and-physical-responses-according-to-the-game-surface-in-a-soccer-simulation-protocol
#6
Jorge Lopez-Fernandez, Javier Sánchez-Sánchez, Jorge García-Unanue, José Luis Felipe, Enrique Colino-Acevedo, Leonor Gallardo
PURPOSE: Recent studies have shown that soccer player's responses are similar on natural grass (NG) and artificial turf (AT), but they did not control the mechanical properties of these surfaces. This work aimed to analyse the influence of the game surface on amateur soccer player's physical and physiological responses using a soccer simulation protocol (SSP). METHODS: Sixteen amateur players performed three bouts of the SSP on AT and NG. The mechanical properties of both surfaces were recorded...
December 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29276855/assessing-differences-in-cardiorespiratory-fitness-with-respect-to-maturity-status-in-highly-trained-youth-soccer-players
#7
Greg Doncaster, John Iga, Viswanath Unnithan
PURPOSE: The purpose of the study was to examine differences in measures of cardiorespiratory fitness and determinants of running economy with respect to maturity status in a group of highly trained youth soccer players. METHODS: A total of 21 highly trained youth soccer players participated in this study. On separate visits, players' peak oxygen uptake (VO2peak), running economy at 3 different speeds [8 km·h-1, 80% gaseous exchange threshold (GET), and 95% GET], and pulmonary oxygen uptake (VO2) kinetics were determined...
December 23, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29239988/effect-of-boards-in-small-sided-street-soccer-games-on-movement-pattern-and-physiological-response-in-recreationally-active-young-men
#8
Morten B Randers, Jonathan Brix, Marie Hagman, Jens J Nielsen, Peter Krustrup
The present study investigated whether street soccer might be proposed as an alternative to recreational small-sided games on grass as a health-enhancing activity, and specifically the effects of the boards surrounding the pitch. Eleven recreationally active young males (28.4±4.2 (±SD) yrs, 19.9±4.2% body fat, 47.7±6.0 mlminkg), after familiarization, completed one to two sessions of 20x13-m 3v3 street soccer games with boards (WB) and one to two sessions without boards (WOB) in a randomized order. Movement pattern was measured using GPS and heart rate recordings, blood sampling and RPE scales were used to evaluate exercise intensity and physiological strain...
December 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29210958/the-reliability-and-validity-of-a-submaximal-warm-up-test-for-monitoring-training-status-in-professional-soccer-players
#9
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/29199786/analysis-of-the-acceleration-profile-according-to-initial-speed-and-positional-role-in-elite-professional-male-soccer-players
#10
Moisés de Hoyo, Borja Sañudo, Luis Suárez-Arrones, Luis Carrasco, Tom Joel, Sergio Domínguez-Cobo, Francisco J Núñez
BACKGROUND: The aim of the current study was to analyse the acceleration profile in elite professional soccer players according to their initial speed but also considering players' position. METHODS: Players' accelerations profiles were analysed using a relative acceleration profile according to the initial speed (S1, from 0 to 7 km/h; S2, from 7.1 to 14.3 km/h; and S3, ≥14.4 km/h) and the maximum acceleration. RESULTS: Within-group analyses showed that Center Backs (CB) performed more high intensity accelerations (likely) when they started in S1 than S2 (ES: 0...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
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
#11
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
#12
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/29189582/aerobic-fitness-in-top-class-soccer-referees
#13
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/29182417/seasonal-training-load-and-wellness-monitoring-in-a-professional-soccer-goalkeeper
#14
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/29176387/effects-of-plyometric-and-directional-training-on-speed-and-jump-performance-in-elite-youth-soccer-players
#15
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/29166851/novel-mathematical-model-to-estimate-ball-impact-force-in-soccer
#16
Takahito Iga, Hiroyuki Nunome, Shinya Sano, Nahoko Sato, Yasuo Ikegami
To assess ball impact force during soccer kicking is important to quantify from both performance and chronic injury prevention perspectives. We aimed to verify the appropriateness of previous models used to estimate ball impact force and to propose an improved model to better capture the time history of ball impact force. A soccer ball was fired directly onto a force platform (10 kHz) at five realistic kicking ball velocities and ball behaviour was captured by a high-speed camera (5,000 Hz). The time history of ball impact force was estimated using three existing models and two new models...
November 22, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29161984/the-prognostic-value-of-physiological-and-physical-characteristics-in-youth-soccer-a-systematic-review
#17
Dennis Murr, Johannes Raabe, Oliver Höner
Talent identification and selection in soccer is typically based on subjective evaluations of experienced coaches. Recently, there has been a trend to complement these subjective assessments with objective tests. However, there is currently no comprehensive overview of the prognostic relevance of objective measurements in youth soccer. Therefore, the primary purpose of the current study was to systematically review published empirical studies related to the prognostic relevance of physiological (e.g. endurance and speed) and physical characteristics (i...
November 21, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29150270/m-biceps-femoris-a-wolf-in-sheep-s-clothing-the-downside-of-a-lower-limb-injury-prevention-training
#18
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
#19
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/29133819/low-perceptual-sensitivity-to-altered-video-speed-in-viewing-a-soccer-match
#20
Claudio de'Sperati, Gabriel Baud Bovy
When watching videos, our sense of reality is continuously challenged. How much can a fundamental dimension of experience such as visual flow be modified before breaking the perception of real time? Here we found a remarkable indifference to speed manipulations applied to a popular video content, a soccer match. In a condition that mimicked real-life TV watching, none of 100 naïve observers spontaneously noticed speed alterations up/down to 12%, even when asked to report motion anomalies, and showed very low sensitivity to video speed changes (Just Noticeable Difference, JND = 18%)...
November 13, 2017: Scientific Reports
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