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https://www.readbyqxmd.com/read/29912076/short-term-plyometric-jump-training-improves-repeated-sprint-ability-in-prepuberal-male-soccer-players
#1
Yassine Negra, Helmi Chaabene, Jaime Fernandez-Fernandez, Senda Sammoud, Raja Bouguezzi, Olaf Prieske, Urs Granacher
Negra, Y, Chaabene, H, Fernandez-Fernandez, J, Sammoud, S, Bouguezzi, R, Prieske, O, and Granacher, U. Short-term plyometric jump training improves repeated-sprint ability in prepuberal male soccer players. J Strength Cond Res XX(X): 000-000, 2018-This study examined the effects of a short-term (i.e., 8 weeks) combined horizontal and vertical plyometric jump training (PJT) program in combination with regular soccer-specific training as compared with soccer-specific training only on jump and change of direction (CoD) performances, speed, and repeated-sprint ability (RSA) in prepuberal male soccer players...
June 14, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29912074/effects-of-2-types-of-activation-protocols-based-on-postactivation-potentiation-on-50-m-freestyle-performance
#2
Francisco Cuenca-Fernández, Ana Ruiz-Teba, Gracia López-Contreras, Raúl Arellano
Cuenca-Fernández, F, Ruiz-Teba, A, López-Contreras, G, and Arellano, R. Effects of 2 types of activation protocols based on postactivation potentiation on 50-m freestyle performance. J Strength Cond Res XX(X): 000-000, 2018-Postactivation potentiation (PAP) is a phenomenon which improves muscle contractility, strength, and speed in sporting performances through previously applied maximal or submaximal loads on the muscle system. This study aimed to assess the effects of 2 types of activation protocols based on PAP, on sprint swimming performance...
June 14, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29910429/effect-of-new-zealand-blackcurrant-extract-on-performance-during-the-running-based-anaerobic-sprint-test-in-trained-youth-and-recreationally-active-male-football-players
#3
Charlie Godwin, Matthew D Cook, Mark E T Willems
It was observed previously that New Zealand blackcurrant (NZBC) extract reduced slowing of the maximal 15 m sprint speed during the Loughborough Intermittent Shuttle Test. We examined the effect of NZBC extract on the performance of the Running Based Anaerobic Sprint Test (RAST, 6 × 35-m sprints with 10 seconds passive recovery) in trained youth and recreationally active football players. Fifteen recreationally active (University team) (age: 20 ± 1 years, height: 174 ± 19 cm, body mass: 80 ± 13 kg) and nine trained youth players (English professional club) (age: 17 ± 0 years, height: 178 ± 8 cm, body mass: 69 ± 9 kg, mean ± SD) participated in three testing sessions...
September 15, 2017: Sports (Basel)
https://www.readbyqxmd.com/read/29910417/effects-of-heart-rate-vs-speed-based-high-intensity-interval-training-on-aerobic-and-anaerobic-capacity-of-female-soccer-players
#4
Hamid Arazi, Abbas Keihaniyan, Amin EatemadyBoroujeni, Amir Oftade, Sheida Takhsha, Abbas Asadi, Rodrigo Ramirez-Campillo
The purpose of this study was to compare the effects of two types of high-intensity interval training (HIIT) programs on aerobic and anaerobic capacity of female soccer players. Regional-level female athletes were randomly divided into heart rate-based HIIT ( n = 8; age 23.4 ± 1.1 year) and speed-based HIIT groups ( n = 8; age 23.4 ± 1.3 year). Athletes trained three days per week for six weeks. Before and after training, each athlete's performance was assessed directly through the Hoff test, 30-15 Intermittent Fitness Test (VIFT), and repeated-sprint ability test (RAST); maximal oxygen consumption (VO₂max), power and fatigue were estimated indirectly...
August 4, 2017: Sports (Basel)
https://www.readbyqxmd.com/read/29910318/seasonal-variations-in-physical-fitness-and-performance-indices-of-elite-soccer-players
#5
Yoav Meckel, Ofer Doron, Eyal Eliakim, Alon Eliakim
The aim of the study was to investigate seasonal variations in fitness and performance indices of professional male soccer players. Eighteen professional male soccer players (age range 22⁻32 years) completed three similar sets of tests at three stages of the season: before preseason; after preseason and the middle of the competitive in-season. A significant decrease in body mass and percent fat was found during the preseason. A significant improvement ( p < 0.05) was found in the vertical jump (preseason: 37...
February 13, 2018: Sports (Basel)
https://www.readbyqxmd.com/read/29902810/the-construct-validity-of-the-coda-and-repeated-sprint-ability-tests-in-football-referees
#6
Amund Riiser, Vidar Andersen, Carlo Castagna, Svein Arne Pettersen, Atle Saeterbakken, Christian Froyd, Einar Ylvisaker, Terje Naess Kjosnes, Vegard Fusche Moe
As of 2017, the international football federation introduced the change of direction ability test (CODA) and the 5×30 m sprint test for assistant referees (ARs) and continued the 6×40 m sprint test for field referees (FRs) as mandatory tests. The aim of this study was to evaluate the association between performance in these tests and running performance during matches at the top level in Norway. The study included 9 FRs refereeing 21 matches and 19 ARs observed 53 times by a local positioning system at three stadiums during the 2016 season...
June 14, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29883534/influence-of-averaging-method-on-muscle-deoxygenation-interpretation-during-repeated-sprint-exercise
#7
Ramón F Rodriguez, Nathan E Townsend, Robert J Aughey, François Billaut
Near-infrared spectroscopy (NIRS) is a common tool used to study oxygen availability and utilisation during repeated-sprint exercise. However, there are inconsistent methods of smoothing and determining peaks and nadirs from the NIRS signal, which make interpretation and comparisons between studies difficult. To examine the effects of averaging method on deoxy-haemoglobin concentration ([HHb]) trends, nine males performed ten 10-s sprints, with 30 s of recovery, and six analysis methods were used for determining peaks and nadirs in the [HHb] signal...
June 8, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29878985/evaluation-of-skating-top-speed-acceleration-and-multiple-repeated-sprint-speed-ice-hockey-performance-tests
#8
Colin W Bond, Tylor W Bennett, Benjamin C Noonan
Bond, CW, Bennett, TW, and Noonan, BC. Evaluation of skating top speed, acceleration, and multiple repeated sprint speed ice hockey performance tests. J Strength Cond Res XX(X): 000-000, 2018-Skating speed, acceleration (ACC), and economy are important attributes related to ice hockey success and should ideally be tested on the ice in a reliable and time efficient manner that is accessible to coaches at all levels of the sport. The purpose of this study was to determine the reliability of certain on-ice tests and further, to use these results to evaluate changes in performance across a season...
June 6, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29871005/the-occurrence-of-repeated-high-acceleration-ability-rhaa-in-elite-youth-football
#9
Fabio R Serpiello, Grant M Duthie, Codey Moran, Damian Kovacevic, Erch Selimi, Matthew C Varley
The aim of the present study was to investigate the occurrence of Repeated High-Acceleration Ability (RHAA) bouts in elite youth football games using 10-Hz GPS devices and two relative thresholds derived from players' actual maximal acceleration. Thirty-six outfield soccer players (age 14.9±0.6 years) participated in the study. Players wore 10-Hz GPS units during 41 official games. High accelerations were defined as efforts commencing above a threshold corresponding to 70% (T70%) or 80% (T80%) of the average 5-m acceleration obtained during a 40-m sprint test; RHAA bouts were defined as ≥3 efforts with ≤45 s recovery between efforts...
June 5, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29864051/concurrent-validity-of-a-rugby-specific-yo-yo-intermittent-recovery-test-level-1-for-assessing-match-related-running-performance
#10
Nick Dobbin, Jamie Highton, Samantha L Moss, Richard Hunwicks, Craig Twist
Dobbin, N, Highton, J, Moss, SL, Hunwicks, R, and Twist, C. Concurrent validity of a rugby-specific Yo-Yo intermittent recovery test (level 1) for assessing match-related running performance. J Strength Cond Res XX(X): 000-000, 2018-This study investigated the concurrent validity of a rugby-specific high-intensity intermittent running test against the internal, external, and perceptual responses to simulated match play. Thirty-six rugby league players (age 18.5 ± 1.8 years; stature 181.4 ± 7.6 cm; body mass 83...
June 1, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29843564/age-related-changes-in-physical-and-perceptual-markers-of-recovery-following-high-intensity-interval-cycle-exercise
#11
Nattai R Borges, Peter R Reaburn, Thomas M Doering, Christos K Argus, Matthew W Driller
BACKGROUND: The purpose of this study was to compare physical performance, perceptual and haematological markers of recovery in well-trained masters and young cyclists across 48 h following a bout of repeated high-intensity interval exercise. METHODS: Nine masters (mean ± SD; age = 55.6 ± 5.0 years) and eight young (age = 25.9 ± 3.0 years) cyclists performed a high-intensity interval exercise session consisting of 6 × 30 s intervals at 175% peak power output with 4...
May 29, 2018: Experimental Aging Research
https://www.readbyqxmd.com/read/29796193/effects-of-acute-sleep-deprivation-and-caffeine-supplementation-on-anaerobic-performance
#12
Joss Moore, Ciaran McDonald, Alan McIntyre, Kevin Carmody, Bernard Donne
Purpose: Athletes involved in team sports may be subject to varying degrees of sleep deprivation either before or after training and competition. Despite the belief among athletes and coaches of the importance of adequate sleep for ensuing performance, the effect of sleep loss on team-sport anaerobic performance remains unclear. There is conflicting evidence in the scientific literature as to the impact of acute sleep deprivation and caffeine supplementation on anaerobic performance indices...
January 2018: Sleep Science
https://www.readbyqxmd.com/read/29795740/effects-of-starting-stance-on-base-running-sprint-speed-in-softball-players
#13
Amy Marquardt, Megan A Wong, Casey M Watkins, Saldiam R Barillas, Andrew J Galpin, Jared W Coburn, Lee E Brown
Speed is a crucial aspect in softball, and can be the difference between winning and losing. Base stealing is a method used to produce runs. There has been debate over which starting position is the most advantageous to maximize acceleration and speed to reach the next base the fastest. The purpose of this study was to examine the effect of different starting stances on acceleration and speed phases in collegiate softball players. Seventeen healthy NCAA Division I women's softball players (age = 19.9 ± 1.3yrs, height = 167...
2018: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29795732/acute-specific-effects-of-caffeine-containing-energy-drink-on-different-physical-performances-in-resistance-trained-men
#14
Camilla Astley, Diego B Souza, Marcos D Polito
Caffeine containing energy drink (ED) is frequently used as ergogenic aid, but its effect on performance need more investigation. Thus, the aim of this study was to analyze the effects of acute ingestion of an ED on the physical performance of resistance-trained men subjected to successive tests in the same experimental protocol. Fifteen resistance-trained males (21.0 ± 0.3 yrs; 177.4 ± 1.8 cm; 79.6 ± 1.8 kg) ingested 2.5 mg caffeine per kg of body weight (619.5 ± 14.6 mL of ED) or a placebo in a double-blind randomized cross-over design...
2018: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29793672/-pastis-study-evaluation-of-an-automated-office-blood-pressure-measurement
#15
O Ayach, G Sarlon Bartoli, F Silhol, C Demari, B Vaïsse
OBJECTIVE: The evaluation of automated office blood pressure (AOBP) measurement compared to 24-hour ambulatory BP monitoring (ABPM), Home BP measurement and manual BP. PATIENTS AND METHODOLOGY: A total of 123 hypertensive patients were included. Overall, 68 completed the 4 measurement: Manual BP in the office (Omron 705 CP 3 measurements), ABPM (Spacelab of 96 measurement/per 24hours), Home BP (18 measurement during 3 days), AOBP using the SPRINT methodology: lying patient, isolated with an automatic measurement (Dinamap) every minutes during 8minutes (average of the last 3 measurement)...
May 21, 2018: Annales de Cardiologie et D'angéiologie
https://www.readbyqxmd.com/read/29791970/effect-of-high-intensity-resistance-circuit-based-training-in-hypoxia-on-aerobic-performance-and-repeat-sprint-ability
#16
Domingo J Ramos-Campo, Ismael Martínez-Guardado, Guillermo Olcina, Cristian Marín-Pagán, Francisco J Martínez-Noguera, Jorge Carlos-Vivas, Pedro E Alcaraz, Jacobo A Rubio-Arias
Recent acute studies have shown that high-intensity resistance circuit-based (HRC) training in hypoxia increases metabolic stress. However, no intervention studies have yet proven their effectiveness. This study aimed to analyse the effect of 8 weeks of HRC in hypoxia on aerobic performance, resting energy expenditure (REE), repeat sprint ability (RSA) and haematological variables. Twenty-eight subjects were assigned to hypoxia (FiO2 =15%; HRChyp : n=15; age: 24.6±6.8 years; height: 177.4±5.9 cm; weight: 74...
May 23, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29786632/influences-of-playing-position-and-quality-of-opposition-on-standardized-relative-distance-covered-in-domestic-women-s-field-hockey-implications-for-coaches
#17
Don Vinson, Nicola Gerrett, David V B James
Vinson, D, Gerrett, N, and James, DVB. Influences of playing position and quality of opposition on standardized relative distance covered in domestic women's field hockey: Implications for coaches. J Strength Cond Res 32(6): 1770-1777, 2018-The purpose of this study was to compare the standardized relative distance covered by the various playing positions (defenders, midfielders, and forwards) against different quality of opponents in domestic women's field hockey. Data were collected from 13 individuals competing for 1 team in the English Premier League across an 18-game season...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29786621/a-resisted-sprint-improves-rate-of-force-development-during-a-20-m-sprint-in-athletes
#18
Gerald T Mangine, Kevin Huet, Cassie Williamson, Emily Bechke, Paul Serafini, David Bender, John Hudy, Jeremy Townsend
Mangine, GT, Huet, K, Williamson, C, Bechke, E, Serafini, P, Bender, D, Hudy, J, and Townsend, J. A resisted sprint improves rate of force development during a 20-m sprint in athletes. J Strength Cond Res 32(6): 1531-1537, 2018-This study examined the effect of a resisted sprint on 20-m sprinting kinetics. After a standardized warm-up, 23 (male = 10, female = 13) Division I basketball players completed 3 maximal 20-m sprint trials while tethered to a robotic resistance device. The first sprint (S1) used the minimal, necessary resistance (1 kg) to detect peak (PK) and average (AVG) sprinting power (P), velocity (V), and force (F); peak rate of force production (RFD) was also calculated...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29769828/the-effect-of-half-time-re-warm-up-duration-on-intermittent-sprint-performance
#19
Takuma Yanaoka, Kyoko Kashiwabara, Yuta Masuda, Jumpei Yamagami, Kuran Kurata, Shun Takagi, Masashi Miyashita, Norikazu Hirose
The purpose of the present study was to investigate the effect of different durations of half-time re-warm up (RW) on intermittent sprint performance. Using a randomized crossover design, 13 healthy men performed three trials, which consisted of two, 40-min intermittent exercises separated by a 15-min half-time. Half-time interventions were 15 min of seated rest (Control), 7 min of cycling at 70% of maximal heart rate (HRmax ) (7 min RW), and 3 min of cycling at 70% of HRmax (3 min RW). The second 40-min intermittent exercise as an exercise performance test was the Cycling Intermittent-Sprint Protocol (CISP), which consisted of 10 s of rest, 5 s of maximal sprint, and 105 s of low-intensity exercise at 50% of VO2max , with the cycles repeated over the 40-min duration...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29768643/effects-of-resistance-training-and-combined-training-program-on-repeated-sprint-ability-in-futsal-players
#20
Julio Torres-Torrelo, David Rodríguez-Rosell, Ricardo Mora-Custodio, Fernando Pareja-Blanco, Juan Manuel Yañez-García, Juan José González-Badillo
The purpose of this study was to compare the effects of 6 weeks resistance training (RT) with combined RT and loaded change of direction (CD) exercise on muscle strength and repeated sprint ability (RSA) in futsal players. Thirty-four players (age: 23.7±4.1 years; height: 1.77±0.06 m; body mass: 74.1±8.2 kg) were randomly assigned into three groups: full squat group (SG, n=12), combined full squat and CD group (S+CDG, n=12), and control group (CG, n=10). The RT for SG consisted of full squat with low-load (~45-60% 1RM) and low-volume (2-3 sets and 4-6 repetitions), whereas the S+CDG performed the same RT program combined with loaded CD (2-5 sets of 10 s)...
May 16, 2018: International Journal of Sports Medicine
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