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https://www.readbyqxmd.com/read/29140914/sequencing-effects-of-neuromuscular-training-on-physical-fitness-in-youth-elite-tennis-players
#1
Jaime Fernandez-Fernandez, Urs Granacher, David Sanz-Rivas, Jose Manuel Sarabia Marín, Jose Luis Hernandez-Davo, Manuel Moya
Fernandez-Fernandez, J, Granacher, U, Sanz-Rivas, D, Sarabia Marín, JM, Hernandez-Davo, JL, and Moya, M. Sequencing effects of neuromuscular training on physical fitness in youth elite tennis players. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to analyze the effects of a 5-week neuromuscular training (NMT) implemented before or after a tennis session in prepubertal players on selected components of physical fitness. Sixteen elite and well-trained tennis players with a mean age of 12...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29112051/a-comparison-of-the-effects-of-short-term-plyometric-and-resistance-training-on-lower-body-muscular-performance
#2
Malcolm T Whitehead, Timothy P Scheett, Michael R McGuigan, N Z Auckland, Angel V Martin
The purpose of this study was to compare effects of short-term plyometric and resistance training on lower body muscular performance. A convenience sample of thirty males aged 21.3 ± 1.8 years, height 177.3 ± 9.4 cm, mass 80.0 ± 2.6 kg, body fat 16.1 ± 1.2 % participated in this investigation. Participants were grouped and participated in progressive plyometric (PLT) or resistance training (SRT) twice per week for eight consecutive weeks or a control (CNT) group that did not participate in any training...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29099673/individualisation-of-speed-thresholds-does-not-enhance-the-dose-response-determination-in-football-training
#3
Dawn Scott, Ric Lovell
This study examined the utility of a range of approaches used to develop player-dependent speed zones in time-motion analysis (TMA), in determining the dose-response (internal load) of daily football training. Daily external (10 Hz GPS) and internal load (heart rate metrics, ratings of perceived exertion [RPE], wellness ratings) measures were tracked for 22 International women's football players during a 21-day training camp. High-speed (HSR) and very high speed running (VHSR) were determined according to arbitrary speed thresholds, as well as using a range of different individualization approaches that included the velocities corresponding to the heart rate deflection point, maximal aerobic speed, YYIR1 performance, and maximal sprint speed (MSS)...
November 3, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29083126/exercise-to-rest-ratios-in-rsa-training-in-women-s-soccer
#4
Bruno Ruscello, Mario Esposito, Filippo Partipilo, Dalila DI Cicco, Cristoforo Filetti, Laura Pantanella, Stefano D'Ottavio
BACKGROUND: To investigate the applicability of three different exercise to rest ratios in RSA training in women's soccer players, applying those ones already adopted in male adult and young players, when performing three different sprinting modes (straight, shuttle and sprinting with changing of direction). METHODS: 15 trained female soccer players (height: 1.65 ± 0.06 m; weight: 59.3 ± 9.0 kg; BMI 21.6 ± 2.7 kg·m-2; age: 23.3±5.9 years) participated to the study...
October 27, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29076961/six-sessions-of-sprint-interval-training-improves-running-performance-in-trained-athletes
#5
Jerome Koral, Dustin J Oranchuk, Roberto Herrera, Guillaume Y Millet
Sprint interval training (SIT) is gaining popularity with endurance athletes. Various studies have shown that SIT allows similar or greater endurance, strength, and power performance improvements than traditional endurance training, but demands less time and volume. One of the main limitations in SIT research is that most studies were performed in a laboratory using expensive treadmills or ergometers. The aim of this study was to assess the performance effects of a novel short term and highly accessible training protocol based on maximal shuttle runs in the field (SIT-F)...
October 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29045314/repeated-sprint-ability-in-division-i-collegiate-male-soccer-players-positional-differences-and-relationships-with-performance-tests
#6
Robert G Lockie, Matthew R Moreno, Ashley J Orjalo, Alyssa A Stage, Tricia M Liu, Samantha A Birmingham-Babauta, Jillian M Hurley, Ibett A Torne, Megan D Beiley, Fabrice G Risso, DeShaun L Davis, Adrina Lazar, John J Stokes, Dominic V Giuliano
Repeated-sprint ability (RSA) in essential for soccer. Important considerations when assessing RSA is whether there are differences between positions (defenders, midfielders, forwards), and what physiological characteristics may contribute to RSA. This has not been assessed in collegiate male players. Eighteen Division I male field players from one school performed several performance tests. The RSA test involved 7 x 30-m sprints completed on 20-s cycles. Measurements included total time (TT), and performance decrement (percent change in time from the first to last sprint; PD)...
October 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29035595/the-influence-of-physical-qualities-on-activity-profiles-of-female-australian-football-match-play
#7
Georgia M Black, Tim J Gabbett, Rich D Johnston, Michael H Cole, Geraldine Naughton, Brian Dawson
PURPOSE: The rapid transition of female Australian football players from amateur to semi-elite competitions has the potential for athletes to be underprepared for match-play. To gain an understanding the match demands of female football, the aims of this study were three-fold: (1) to highlight the physical qualities that discriminate selected and non-selected female Australian Football players, (2) to investigate activity profiles of female Australian Football players, and (3) to gain an understanding of the influence of physical qualities on running performance in female Australian Football match-play...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29035588/external-match-loads-of-footballers-with-cerebral-palsy-a-comparison-among-sport-classes
#8
Javier Yanci, Daniel Castillo, Aitor Iturricastillo, Tomás Urbán, Raúl Reina
PURPOSE: The aim of this study was to determine and to compare the external match load (ML), according to sport class (FT) of footballers with cerebral palsy (CP) during the International Federation of CP Football (IFCPF) World Championships Qualification Tournament. METHODS: Forty-two international male footballers with CP participated in the data collection. The footballers with CP were classified according to their FT in three groups (i.e. FT5/6, FT7, and FT8)...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29034224/trends-in-motor-performance-of-first-graders-a-comparison-of-cohorts-from-2006-to-2015
#9
Sarah Spengler, Matthias Rabel, Arvid Marius Kuritz, Filip Mess
BACKGROUND: Motor performance is an important factor for health. Already in childhood, motor performance is associated with, e.g., obesity and risk factors for cardiovascular diseases. It is widely believed that the motor performance of children has declined over recent years. However, this belief is lacking clear evidence. The objective of this study was to examine trends in motor performance of first grade students during a period of 10 years (2006-2015). We examined trends in (a) aerobic fitness, (b) strength, (c) speed, and (d) balance for boys and girls separately and considered body mass index (BMI) as a potential confounder...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29023331/effects-of-plyometric-training-on-components-of-physical-fitness-in-prepuberal-male-soccer-athletes-the-role-of-surface-instability
#10
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Bessem Mkaouer, Younés Hachana, Urs Granacher
Negra, Y, Chaabene, H, Sammoud, S, Bouguezzi, R, Mkaouer, B, Hachana, Y, and Granacher, U. Effects of plyometric training on components of physical fitness in prepuberal male soccer athletes: the role of surface instability. J Strength Cond Res XX(X): 000-000, 2017-Previous studies contrasted the effects of plyometric training (PT) conducted on stable vs. unstable surfaces on components of physical fitness in child and adolescent soccer players. Depending on the training modality (stable vs. unstable), specific performance improvements were found for jump (stable PT) and balance performances (unstable PT)...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29018950/are-viviparous-lizards-more-vulnerable-to-climate-warming-because-they-have-evolved-reduced-body-temperature-and-heat-tolerance
#11
Zheng Wang, Li Ma, Min Shao, Xiang Ji
Lizards may experience population declines and extinctions on a similar scale to that experienced by amphibians, and climate warming is one hypothesis proposed to explain these declines and extinctions. Within lizards, viviparous species are hypothesized to be more vulnerable to climate warming, because they have evolved reduced body temperature and heat tolerance, but this idea remains untested. To test this hypothesis, we conducted three temperatures (20, 24, and 28 °C) × two species [Phrynocephalus przewalskii (oviparous) and P...
December 2017: Oecologia
https://www.readbyqxmd.com/read/29018362/effects-of-unloaded-vs-loaded-plyometrics-on-speed-and-power-performance-of-elite-young-soccer-players
#12
Ronaldo Kobal, Lucas A Pereira, Vinicius Zanetti, Rodrigo Ramirez-Campillo, Irineu Loturco
The purpose of this study was to investigate the effects of loaded and unloaded plyometric training strategies on speed and power performance of elite young soccer players. Twenty-three under-17 male soccer players (age: 15.9 ± 1.2 years, height: 178.3 ± 8.1 cm, body-mass (BM): 68.1 ± 9.3 kg) from the same club took part in this study. The athletes were pair-matched in two training groups: loaded vertical and horizontal jumps using an haltere type handheld with a load of 8% of the athletes' body mass (LJ; n = 12) and unloaded vertical and horizontal plyometrics (UJ; n = 11)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28988513/step-to-step-spatiotemporal-variables-and-ground-reaction-forces-of-intra-individual-fastest-sprinting-in-a-single-session
#13
Ryu Nagahara, Mirai Mizutani, Akifumi Matsuo, Hiroaki Kanehisa, Tetsuo Fukunaga
We aimed to investigate the step-to-step spatiotemporal variables and ground reaction forces during the acceleration phase for characterising intra-individual fastest sprinting within a single session. Step-to-step spatiotemporal variables and ground reaction forces produced by 15 male athletes were measured over a 50-m distance during repeated (three to five) 60-m sprints using a long force platform system. Differences in measured variables between the fastest and slowest trials were examined at each step until the 22nd step using a magnitude-based inferences approach...
October 7, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28965347/construct-validity-of-accelerometry-derived-force-to-quantify-basketball-movement-patterns
#14
Craig Staunton, Daniel Wundersitz, Brett Gordon, Michael Kingsley
This study assessed the construct validity of accelerometry-derived net force to quantify the external demands of basketball movements. Twenty-eight basketballers completed the Yo-Yo intermittent recovery test (Yo-Yo-IR1) and basketball exercise simulation test (BEST). Intensity was quantified using accelerometry-derived average net force (AvFNet) and PlayerLoad(TM) per minute (PL/min). Within-player correlations were determined between intensity and running speed during Yo-Yo-IR1. Measured AvFNet was determined for movements during the BEST and predicted AvFNet was calculated using movement speed and correlations from Yo-Yo-IR1...
October 1, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28964690/maturation-related-adaptations-in-running-speed-in-response-to-sprint-training-in-youth-soccer-players
#15
Jason Moran, Dave A Parry, Ieuan Lewis, Jay Collison, Michael C Rumpf, Gavin R H Sandercock
OBJECTIVES: This study investigated the effects of a previously recommended dose of sprint training (ST) in young male soccer players of differing maturity status. DESIGN: Quasi-experimental design. METHODS: Male soccer players from two professional academies were divided into Pre-PHV (Training: n=12; Control: n=13) and Mid-PHV (Training: n=7; Control=10) groups. The training groups completed 16 sprints of 20m with 90s recovery, once per week...
September 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28952906/association-of-sprint-performance-with-ground-reaction-forces-during-acceleration-and-maximal-speed-phases-in-a-single-sprint
#16
Ryu Nagahara, Mirai Mizutani, Akifumi Matsuo, Hiroaki Kanehisa, Tetsuo Fukunaga
We aimed to clarify the mechanical determinants of sprinting performance during acceleration and maximal speed phases of a single sprint, using ground reaction forces (GRFs). While 18 male athletes performed a 60-m sprint, GRF was measured at every step over a 50-m distance from the start. Variables during the entire acceleration phase were approximated with a fourth-order polynomial. Subsequently, accelerations at 55%, 65%, 75%, 85%, and 95% of maximal speed, and running speed during the maximal speed phase were determined as sprinting performance variables...
September 27, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28944649/neuromuscular-responses-and-physiological-patterns-during-a-soccer-simulation-protocol-artificial-turf-versus-natural-grass
#17
Jorge López-Fernández, Jorge García-Unanue, Javier Sánchez-Sánchez, Manuel León, Enrique Hernando, Leonor Gallardo
BACKGROUND: Latest studies suggest similar performance of soccer players either on artificial turf (AT) or natural grass (NG). However, it is not clear if their muscular and physiological responses are also similar on both surfaces. This research aims to assess the influence of game surface on physiological patterns and neuromuscular responses of soccer players during a soccer simulation protocol (SSP) that incorporates repeated sprints and nonlinear actions at maximum speed. METHODS: Sixteen amateur soccer players completed three bouts of the SSP on both AT and NG...
September 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28933713/adaptations-associated-with-an-after-school-strength-and-conditioning-program-in-middle-school-aged-boys-a-quasi-experimental-design
#18
Brennan J Thompson, Matt S Stock, Jacob A Mota, Alexander S Drusch, Ryan N DeFranco, Tyler R Cook, Matthew A Hamm
High-intensity strength and conditioning programs aimed at improving youth performance are becoming increasingly prevalent. The purpose of this study was to investigate the effects of a 16-week after-school strength and conditioning program on performance and body composition in middle-school-aged boys. Subjects in the training group (n = 16, mean age = 11.8 years) performed 90 minutes of supervised plyometric and resistance training twice weekly for 16 weeks. A group of control subjects (n = 9, age = 12.1 years) maintained their current activity levels...
October 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930869/quantifying-the-external-and-internal-loads-of-professional-rugby-league-training-modes-consideration-for-concurrent-field-based-training-prescription
#19
Dan Weaving, Ben Jones, Kevin Till, Phil Marshall, Keith Earle, Grant Abt
Practitioners prescribe numerous training modes to develop the varied physical qualities professional rugby league players must express during competition. The aim of the current study was to determine how the magnitude of external and internal training load per minute of time differs between modes in professional rugby league players. This data were collected from 17 players across 716 individual sessions (mean (SD) sessions: 42 (13) per player) which were categorised by mode (conditioning, small sided games, skills and sprint training)...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28915864/physical-fitness-and-anthropometric-characteristics-among-adolescents-living-in-urban-or-rural-areas-of-kosovo
#20
Faton Tishukaj, Ismet Shalaj, Masar Gjaka, Besim Ademi, Rrustem Ahmetxhekaj, Norbert Bachl, Harald Tschan, Barbara Wessner
BACKGROUND: High physical fitness levels in childhood and adolescence are associated with positive health-related outcomes later in life. Albeit many researchers investigated rural-urban differences in physical fitness, the outcomes of these studies are inconsistent and data on Kosovo are widely missing. Thus, this study aims to examine anthropometric and physical fitness parameters in 14 to 15 year old Kosovan adolescents living in rural and urban areas. METHODS: Two schools from Pristina (mostly urban population) and two schools in the surrounding villages of the district of Deçan (mostly rural population) were selected...
September 16, 2017: BMC Public Health
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