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Repeated sprints

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https://www.readbyqxmd.com/read/29599871/effects-of-different-post-activation-potentiation-warm-ups-on-repeated-sprint-ability-in-soccer-players-from-different-competitive-levels
#1
Javier Sanchez-Sanchez, Alejandro Rodriguez, Cristina Petisco, Rodrigo Ramirez-Campillo, Cristian Martínez, Fábio Y Nakamura
This study aimed to compare the effects of a traditional warm-up with two post-activation potentiation (PAP) warm-up strategies on the repeated sprint ability (RSA) of soccer players from national (NL) and regional (RL) competitive levels. Sixteen young players (NL, n = 8, age = 20.7 ± 1.4 y, body mass = 68.5 ± 7.0 kg, body height = 177.4 ± 5.2 cm; RL, n = 8, age = 20.8 ± 1.0 y, body mass = 68.7 ± 4.0 kg, body height = 176.6 ± 5.6 cm) were recruited to complete a traditional warm-up (CONTROL), a PAP warm-up incorporating squats with a load (~60% 1RM) that allowed a high speed (1 m/s) of movement and a high number of repetitions (PAP-1), and a PAP warm-up with a load (~90% 1RM) that allowed a moderate speed (0...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29566344/diurnal-variation-in-repeated-sprint-performance-cannot-be-offset-when-rectal-and-muscle-temperatures-are-at-optimal-levels-38-5%C3%A2-c
#2
Samuel A Pullinger, Juha Oksa, Liam F Clark, Joe W F Guyatt, Antonia Newlove, Jatin G Burniston, Dominic A Doran, James M Waterhouse, Ben J Edwards
The present study investigated whether increasing morning rectal temperatures (Trec ) to evening levels, or increasing morning and evening Trec to an "optimal" level (38.5°C), resulting in increased muscle temperatures (Tm ), would offset diurnal variation in repeated sprint (RS) performance in a causal manner. Twelve trained males underwent five sessions [age (mean ± SD) 21.0 ± 2.3 years, maximal oxygen consumption (V̇O2 max) 60.0 ± 4.4 mL.kg-1  min-1 , height 1.79 ± 0.06 m, body mass 78...
March 22, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29562831/comparative-study-between-fully-tethered-and-free-swimming-at-different-paces-of-swimming-in-front-crawl
#3
Mathias Samson, Tony Monnet, Anthony Bernard, Patrick Lacouture, Laurent David
Tethered swimming is a method often used to measure or enhance the physical and technical resources of swimmers. Although it is highlighted that the technique used in tethered swimming is probably different from that used in free conditions, there are few comparative studies on this subject. The current study aims to compare fully tethered and free swimming based on kinematic hand parameters (orientation, velocity and acceleration of the hand, sweepback and angle of attack), which are known to act directly on the generation of propulsive forces...
March 21, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29557676/controlling-rectal-and-muscle-temperatures-can-we-offset-diurnal-variation-in-repeated-sprint-performance
#4
Samuel A Pullinger, Juha Oksa, Emma L Brocklehurst, Reece P Iveson, Antonia Newlove, Jatin G Burniston, Dominic A Doran, James M Waterhouse, Ben J Edwards
The present study investigated whether increasing morning rectal temperatures (Trec ) to resting.evening levels, or decreasing evening Trec or muscle (Tm ) temperatures to morning values, would influence repeated sprint (RS) performance in a causal manner. Twelve trained males underwent five sessions [age (mean ± SD) 21.8 ± 2.6 yr, peak oxygen uptake ([Formula: see text] peak) 60.6 ± 4.6 mL kg min-1 , stature 1.78 ± 0.07 m and body mass 76.0 ± 6.3 kg]. These included a control morning (M, 07:30 h) and evening (E, 17:30 h) session (5-min warm-up), and three further sessions consisting of a warm-up morning trial (ME , on a motorised treadmill) until Trec reached evening levels; and two cool-down evening trials (in 16-17°C water) until Trec (EMrec ) or Tm (EMmuscle ) values reached morning temperatures, respectively...
March 20, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29549523/the-effects-of-taurine-on-repeat-sprint-cycling-after-low-or-high-cadence-exhaustive-exercise-in-females
#5
Mark Waldron, Francesca Knight, Jamie Tallent, Stephen Patterson, Owen Jeffries
This study investigated the effects of taurine on repeated sprint exercise, performed after fixed incremental ramp exercise to exhaustion at isokinetic high (90 r/min) or low (50 r/min) cadences. In a double-blind, repeated measures design, nine females completed an incremental ramp test to volitional exhaustion, followed by 2 min active recovery and 6 × 10 s sprints on a cycle ergometer, in one of four conditions: high cadence (90 r/min) + taurine (50 mg/kg body mass); high cadence + placebo (3 mg/kg body mass maltodextrin); low cadence (50 r/min) + taurine; low cadence + placebo...
March 17, 2018: Amino Acids
https://www.readbyqxmd.com/read/29543081/positional-comparisons-in-the-impact-of-fatigue-on-movement-patterns-in-hockey
#6
Esther Morencos, Blanca Romero-Moraleda, Carlo Castagna, David Casamichana
PURPOSE: The aim of this study was to examine the influence of match period on the movement patterns of hockey players according to their playing position under the introduction of quarters. METHODS: Sixteen sub-elite level Spanish National League male hockey players participated in the study (age: 25.5 ± 2.9 years; body mass: 74.6 ± 5.5 kg). Global Positioning Systems (GPS) devices were used to monitor players running performance during 17 competitive matches (113 match-play profiles)...
March 15, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29543079/repeated-exposure-to-established-high-risk-workload-scenarios-improves-non-contact-injury-prediction-in-elite-australian-footballers
#7
Marcus J Colby, Brian Dawson, Peter Peeling, Jarryd Heasman, Brent Rogalski, Michael K Drew, Jordan Stares
OBJECTIVES: To assess the effect of multiple high risk scenario (HRS) exposures on non-contact injury prediction in elite Australian footballers. DESIGN: Retrospective cohort study. METHODS: Sessional workload data (session-rating of perceived exertion; GPS-derived distance, sprint distance, maximum velocity) from one club (n= 60 players) over 3 seasons were collated; several established HRS were also defined. Accumulated HRS sessional exposures were calculated retrospectively (previous 1-8 weeks)...
March 15, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29541136/physical-and-physiological-demands-of-futsal
#8
REVIEW
Naser Naser, Ajmol Ali, Paul Macadam
Futsal, the 5-a-side version of soccer (i.e. 1 goalkeeper and 4 outfield players), was introduced in 1930 and continues to grow in popularity around the world. Competitive games comprise of two 20-min periods of high-intensity and intermittent activities requiring substantial physical, tactical, and technical efforts from the players. A greater understanding of the physical and skill requirements will aid the development of futsal and enable practitioners to undertake appropriate training regimes for the demands of the sport...
December 2017: Journal of Exercise Science and Fitness
https://www.readbyqxmd.com/read/29533360/sex-comparison-of-knee-extensor-size-strength-and-fatigue-adaptation-to-sprint-interval-training
#9
Liam Bagley, Nasser Al-Shanti, Steven Bradburn, Osamah Baig, Mark Slevin, Jamie S McPhee
BACKGROUND: Regular sprint interval training (SIT) improves whole-body aerobic capacity and muscle oxidative potential, but very little is known about knee extensor anabolic or fatigue resistance adaptations, or whether effects are similar for males and females. The purpose of this study was to compare sex-related differences in knee extensor size, torque-velocity relationship and fatigability adaptations to 12 weeks SIT. METHODS: Sixteen males and fifteen females (mean (SEM) age: 41 (±2...
March 12, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29529604/influence-of-sprint-study-type-automated-office-blood-pressure-measurements-on-hypertension-diagnosis-in-kidney-transplant-patients
#10
Akanksha Bhatnagar, Ulrich Pein, Silke Markau, Karl Weigand, Paolo Fornara, Matthias Girndt, Eric Seibert
BACKGROUND/AIMS: We compare conventional office blood pressure measurements with automated SPRINT-study type readings in kidney transplant recipients in order to determine the impact of the white coat effect in a prospective observational study. METHODS: Adult patients with a functional renal transplant not dependent on dialysis were eligible. Readings were taken in the office in presence of the physician with an oscillometric method. Afterwards, readings were repeated with the patients resting alone in a quiet examination room with an automated blood pressure monitor...
March 6, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29528955/effects-of-small-sided-games-and-high-intensity-interval-training-on-aerobic-and-repeated-sprint-performance-and-peripheral-muscle-oxygenation-changes-in-elite-junior-basketball-players
#11
A Delextrat, M Gruet, F Bieuzen
The aim of the current study was to compare the effects of 6 weeks of small-sided game (SSG) and high-intensity interval training (HIIT) on aerobic fitness and muscle oxygenation during a repeated sprint (RS) sequence in elite male junior basketball players. Twenty participants (14.3 ± 0.5 years; 176.8 ± 12.5 cm; 74.5 ± 9.8 kg) performed pre- and post-tests interspersed by 6-weeks of SSG or HIIT training. Testing sessions consisted of the 30-15 Intermittent Fitness Test and a RS sequence (two bouts of 15-s)...
March 6, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29527927/acute-beetroot-juice-administration-improves-peak-isometric-force-production-in-adolescent-males
#12
David Bender, Jeremy R Townsend, William Vantrease, Autumn C Marshall, Ruth N Henry, Stephen Heffington, Kent D Johnson
The purpose of this study was to examine the effects of acute beetroot juice (BR) administration on repeated sprint performance and isometric force production in adolescent males. Twelve male adolescents (16.8 ± 1.0 yrs; 178.8 ± 9.2 cm; 74.8 ± 12.5 kg; peak height velocity: 2.53 ± 1.2 yrs) participated in this double-blind, placebo-controlled, crossover designed study. Participants consumed 2 x 70 mL of BR (~12.9 mmol NO3¯; Beet It Sport®) or a nitrate-depleted placebo (PL) 2.5 hours prior to performing isometric mid-thigh pulls (IMTP) and four repeated 20-second Wingate sprints (S1-S4) interspersed with 4 minutes of rest...
March 10, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29511660/sprint-interval-training-on-the-vertical-treadmill-improves-aerobic-and-anaerobic-running-performance
#13
Alastair Ross Jordan, David Claxton, Alison Purvis, Andrew Barnes, Mary Fysh
The vertical treadmill (VertiRun) is an unresearched mode of exercise where users engage in a "running-like" action whilst body weight is supported by a recumbent bench and overhanging resistance cables are tethered to the user's ankles. The purpose of this study was to determine the effects of training on a VertiRun and any cross-training effect on running performance. Thirty active males (age, 22±4 years; stature, 1.79±0.08 m; body mass, 78.5±12.6 kg) volunteered for this study. Participants' aerobic and anaerobic running performance were determined by incremental maximum rate of oxygen consumption (VO2max) treadmill test and a maximum anaerobic running test (MART), respectively...
February 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29507731/the-perceived-effects-and-comfort-of-various-body-armour-systems-on-police-officers-while-performing-occupational-tasks
#14
B Schram, B Hinton, R Orr, R Pope, G Norris
Background: The nature of police work often necessitates use of Individual Light Armour Vests (ILAVs) for officer protection. Previous research has demonstrated various biomechanical and physical performance impacts of ILAVs, however, little knowledge exists on the individual officer's perceptions of ILAV. The aim of this study was to investigate officers' perceptions of the impacts of three different ILAVs and normal station wear whilst performing police occupational tasks. Methods: A prospective, within subjects, repeated measures design was employed in which 11 serving police officers wore each of three different types of body armour (ILAV A, ILAV B or ILAV C) and normal station wear for a full day while performing tasks including a simulated victim drag, a patrol vehicle exit and a marksmanship shoot...
2018: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29489720/differences-in-physical-performance-according-to-the-competitive-level-in-amateur-handball-players
#15
Estibaliz Romaratezabala, Fabio Nakamura, Rodrigo Ramirez-Campillo, Daniel Castillo, Josune Rodríguez-Negro, Javier Yanci
The aim of this study was to compare physical performance in amateur handball players of two different competitive levels. Thirty-four senior handball players were divided into two groups according to their competitive level (regional category: REG or national category: NAC). Although no significant differences were found between groups in any of the horizontal (HJ) or vertical jump (VJ) variables (p>0.05), NAC players obtained a better performance in the repeated sprint ability (RSA) test (RSABest [the best attempt] and RSATT [the total time in the total of sprints] in 15 m and 30 m), in change of direction ability (CODA) and in the Yo-Yo Intermittent Recovery test Level 1 (YYIR1) test (p<0...
February 27, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29471799/-not-just-another-wii-training-a-graded-wii-protocol-to-increase-physical-fitness-in-adolescent-girls-with-probable-developmental-coordination-disorder-a-pilot-study
#16
Emmanuel Bonney, Eugene Rameckers, Gillian Ferguson, Bouwien Smits-Engelsman
BACKGROUND: Adolescents with low motor competence participate less in physical activity and tend to exhibit decreased physical fitness compared to their peers with high motor competence. It is therefore essential to identify new methods of enhancing physical fitness in this population. Active video games (AVG) have been shown to improve motor performance, yet investigations of its impact on physical fitness are limited. The objective of this study was to examine the impact of the graded Wii protocol in adolescent girls with probable Developmental Coordination Disorder (p-DCD)...
February 22, 2018: BMC Pediatrics
https://www.readbyqxmd.com/read/29466269/neuromuscular-effects-to-6-weeks-of-loaded-countermovement-jumping-with-traditional-and-daily-undulating-periodization
#17
Boris Ullrich, Thiemo Pelzer, Mark Pfeiffer
Ullrich, B, Pelzer, T, and Pfeiffer, M. Neuromuscular effects to 6 weeks of loaded countermovement jumping with traditional and daily undulating periodization. J Strength Cond Res 32(3): 660-674, 2018-Loaded vertical jumps are routinely used to enhance athlete's power production in the lower extremity and to optimize jumping and sprinting performance. This study compared traditional (TP) and daily undulating (DUP) periodization on muscle strength, jumping performance, electromyographic (EMG) muscle activity, and muscle architecture during preseason loaded jump training...
March 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29466079/passive-recovery-reduces-fatigue-during-repeated-change-of-direction-sprints-in-basketball-players
#18
Maria C Madueno, Vincent J Dalbo, Joshua H Guy, Kate E Giamarelos, Tania Spiteri, Aaron T Scanlan
PURPOSE: To investigate the physiological and performance effects of active and passive recovery between repeated-change-of-direction (RCOD) sprints. METHODS: Eight semi-professional basketball players (age: 19.9 ± 1.5 yr; stature: 183.0 ± 9.6 cm; body mass: 77.7 ± 16.9 kg; body fat: 11.8 ± 6.3%; VO2peak : 46.1 ± 7.6 mL·kg-1 ·min-1 ) completed 12 x 20-m RCOD sprints (Agility 5-0-5 Tests) interspersed with 20 s of active (50% maximal aerobic speed) or passive recovery in a randomized cross-over design...
February 21, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29462969/milk-an-effective-recovery-drink-for-female-athletes
#19
Paula Rankin, Adrian Landy, Emma Stevenson, Emma Cockburn
Milk has become a popular post-exercise recovery drink. Yet the evidence for its use in this regard comes from a limited number of investigations utilising very specific exercise protocols, and mostly with male participants. Therefore, the aim of this study was to investigate the effects of post-exercise milk consumption on recovery from a sprinting and jumping protocol in female team-sport athletes. Eighteen females participated in an independent-groups design. Upon completion of the protocol participants consumed 500 mL of milk (MILK) or 500 mL of an energy-matched carbohydrate (CHO) drink...
February 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29431546/the-trainability-of-adolescent-soccer-players-to-brief-periodized-complex-training
#20
Athanasios Chatzinikolaou, Konstantinos Michaloglou, Alexandra Avloniti, Diamanda Leontsini, Chariklia K Deli, Dimitris Vlachopoulos, Luis Gracia-Marco, Sotirios Arsenis, Ioannis Athanailidis, Dimitrios Draganidis, Athanasios Z Jamurtas, Craig A Williams, Ioannis G Fatouros
PURPOSE: Τo investigate the effect of a complex, short-term strength/power training protocol on performance and body composition of elite early-adolescent soccer players. METHODS: Twenty-two players (14-15 years) were randomly assigned to (a) an experimental (EG, n=12, participated in a 5-week training protocol with traditional multi-joint power resistance exercises, Olympic-style lifts, plyometric drills and speed work, four times/week) or (b) a control group (CG, n=10)...
February 12, 2018: International Journal of Sports Physiology and Performance
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