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Journal of Strength and Conditioning Research

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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/29140913/sex-differences-in-aerobic-fitness-in-top-class-soccer-referees
#2
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/29140912/reliable-testing-battery-for-assessing-physical-qualities-of-elite-academy-rugby-league-players
#3
Nick Dobbin, Richard Hunwicks, Jamie Highton, Craig Twist
Dobbin, N, Hunwicks, R, Highton, J, and Twist, C. Reliable testing battery for assessing physical qualities of elite academy rugby league players. J Strength Cond Res XX(X): 000-000, 2017-This study assessed the interday reliability of a testing battery for the assessment of physical qualities of rugby league players. Fifty players (age 17.1 ± 1.1 years; stature 181.3 ± 6.3 cm; and body mass 89.0 ± 11.6 kg) from 3 Super League academies participated in this study. Tests of countermovement jump performance, 10- and 20-m sprint performance, change of direction, medicine ball throw, and a modified Yo-Yo Intermittent Recovery Test Level 1 (prone Yo-Yo IR1) were completed on 3 separate occasions...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140910/polygenic-profile-and-exercise-induced-muscle-damage-by-a-competitive-half-ironman
#4
Juan Del Coso, Juan J Salinero, Beatriz Lara, César Gallo-Salazar, Francisco Areces, David Herrero, Carlos Puente
Del Coso, J, Salinero, JJ, Lara, B, Gallo-Salazar, C, Areces, F, Herrero, D, and Puente, C. Polygenic profile and exercise-induced muscle damage by a competitive half-ironman. J Strength Cond Res XX(X): 000-000, 2017-To date, it is still unknown why some individuals develop higher levels of muscle damage than other individuals, despite participating in exercise with comparable levels of physical intensity. The aim of this investigation was to analyze 7 single-nucleotide polymorphisms (SNPs) that are candidates to explain individual variations in the level of muscle damage attained during a half-ironman competition...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140909/the-effects-of-load-on-peak-power-output-fatigue-during-the-bench-throw
#5
David Boffey, Bulent Sokmen, Kurt Sollanek, Wanda Boda, Steven Winter
The ability to create power is an important variable for athletic success. No study to date has compared peak power output (PPO) fatigue across multiple sets and with different loads with the bench throw. This study aimed to begin the process of establishing empirical upper body power training guidelines for moderately strong athletes by determining how load (30%, 45%, 60% 1RM) affects PPO (Watts) dropoff during 3 sets of 10 repetitions of the bench throw. 10 resistance-trained male volunteers ((mean ± SD): age 20...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140908/heart-rate-monitoring-in-basketball-applications-player-responses-and-practical-recommendations
#6
Daniel M Berkelmans, Vincent J Dalbo, Crystal O Kean, Zoran Milanović, Emilija Stojanović, Nenad Stojiljković, Aaron T Scanlan
The aims of this review were to collate the existing literature encompassing heart rate (HR) monitoring in basketball to: (i) identify the applications of HR measurement; (ii) report HR responses in male and female players during training and game-play; (iii) evaluate use of current HR-based training load models; and (iv) provide recommendations for future research and best practice approaches for basketball practitioners. HR monitoring in basketball carries three primary applications: (i) monitoring exercise intensity; (ii) assessing player fatigue status; and (iii) quantifying internal training load...
November 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140907/the-singapore-sling-f1-race-team-cognitive-function-and-mood-responses-during-the-singapore-grand-prix
#7
Barry V O'Neill, Kirsty M Davies, Tess E Morris
The current investigation measured cognitive performance, subjective ratings of mood and sleep in Formula 1® (F1) race team members during the 2013 Singapore Grand Prix. Two weeks prior to the Singapore Grand Prix participants (n = 16; mean age 33.5 years, range 22-48 years) underwent baseline cognitive assessments as well as a questionnaire on mood and sleep quality/duration. These assessments were repeated on the race weekend prior to practice (S1) and post qualifying (S2). A significant increase in simple reaction time (SRT), that is slowing of total response time was observed from baseline to S1 (33...
November 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140911/effect-of-bench-press-load-knowledge-on-repetitions-rpe-and-attentional-focus
#8
Christina M Beaudoin, Zachary Cox, Tyler Dundore, Tayler Thomas, Johnathon Kim, Daniel Pillivant
Few studies have examined the role of the teleoanticipation during resistance training. The purpose of this study was to examine the effect of bench press (BP) load knowledge on repetitions completed, ratings of perceived exertion (RPE), and attentional focus (%associative). Thirty-six recreationally active resistance trained men (n = 25) and women (n = 11) participated in this study (age= 20.97 + 1.87 yrs; ht 174.12 + 9.41 cm; mass 80.14 + 14.03 kg). All subjects completed three testing sessions: 1) One-repetition maximum (1RM) BP determination; 2) Submaximal BP repetitions to fatigue known load (KL); 3) Submaximal BP repetitions to fatigue unknown load (UL)...
November 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120989/validity-and-reliability-of-a-new-test-of-planned-agility-in-elite-taekwondo-athletes
#9
Helmi Chaabene, Yassine Negra, Laura Capranica, Raja Bouguezzi, Younés Hachana, Mohamed Ali Rouahi, Bessem Mkaouer
This study aimed to examine the validity, reliability, and sensitivity of a new test of planned agility in elite taekwondo athletes and to establish its relationship with sprint-time, jumping ability, and dynamic balance. Twenty-seven (20 males and 7 females) taekwondo athletes participated to this study. They performed taekwondo-specific agility test (TSAT) in two occasions (i.e., test-retest). Additionally, they performed jumping ability (i.e., squat jump, countermovement jump, standing long jump, and three-hop jump), sprint-time (5-m and 20-m dash), and dynamic balance (i...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120988/measuring-vertical-stiffness-in-sport-with-accelerometers-exercise-caution
#10
Tahleya M Eggers, Tim I Massard, Peter J Clothier, Ric Lovell
This study aimed to determine the measurement accuracy of triaxial accelerometers to determine vertical stiffness (Kvert) during overground running, and to examine the influence of device location. Seventeen healthy adults wore two triaxial accelerometers (positioned between scapulae and at lumbar spine) during a 2 min continuous 20 m shuttle run (12 km⋅h), which was repeated 7-d later. Accelerometer-derived Kvert data was compared to that calculated from corresponding force-plate ground contacts (criterion measure)...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120987/continuous-and-accumulated-bouts-of-cycling-matched-by-intensity-and-energy-expenditure-elicit-similar-acute-blood-pressure-reductions-in-prehypertensive-men
#11
Guilherme F Fonseca, Paulo T V Farinatti, Adrian W Midgley, Arthur Ferreira, Tainah de Paula, Walace D Monteiro, Felipe A Cunha
Fonseca, GF, Farinatti, PTV, Midgley, AW, Ferreira, A, de Paula, T, Monteiro, WD, and Cunha, FA. Continuous and accumulated bouts of cycling matched by intensity and energy expenditure elicit similar acute blood pressure reductions in prehypertensive men. J Strength Cond Res XX(X): 000-000, 2017-This study investigated differences in postexercise hypotension (PEH) after continuous vs. accumulated isocaloric bouts of cycling. Ten prehypertensive men, aged 23-34 years, performed 2 bouts of cycling at 75% oxygen uptake reserve, with total energy expenditures of 400 kcal per bout...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120986/acute-capsaicin-supplementation-improves-1500-m-running-time-trial-performance-and-rate-of-perceived-exertion-in-physically-active-adults
#12
Marcelo Conrado de Freitas, Jason M Cholewa, Luis A Gobbo, João Vitor N S de Oliveira, Fabio S Lira, Fabrício E Rossi
The purpose of this study was to investigate the acute effect of capsaicin supplementation on performance, rate of perceived exertion and blood lactate concentrations during short duration running in physically active adults. Ten physically active men (age= 23.5±1.9 yrs, weight= 78.3±12.4 kg, height= 177.9±5.9 cm) completed two randomized, double-blind trials: Capsaicin condition (12 mg) or a placebo condition. Forty five minutes after supplement consumption, the participants performed a 1500 meter running time trial...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120985/the-influence-of-team-rating-on-running-performance-in-elite-gaelic-football
#13
Shane Mangan, Shane Malone, Martin Ryan, Jason Mc Gahan, Joe Warne, Denise Martin, Cian O'Neill, Con Burns, Kieran Collins
It is currently unknown how team rating influences running performance in Gaelic football. GPS technologies were used to quantify match-running performance within 5 elite Gaelic football teams over a period of 5 years (2012-2016). In total 780 player data sets were collected over 95 matches. Running performance variables included total distance, high-speed distance (≥17 km h) and the percentage of high-speed distance. Team ratings were determined objectively using the Elo Ratings System for Gaelic football...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120984/effects-of-different-resistance-training-systems-on-muscular-strength-and-hypertrophy-in-resistance-trained-older-women
#14
Alex S Ribeiro, Andreo F Aguiar, Brad J Schoenfeld, João Pedro Nunes, Edilaine F Cavalcanti, Eduardo L Cadore, Edilson S Cyrino
The purpose of this study was to investigate the effect of resistance training (RT) performed in a pyramid (PR) versus constant (CT) load system on muscular strength and hypertrophy in resistance-trained older women. Thirty-three older women (69.7±5.9 years, 69.1±15.0 kg, 156.6±6.2 cm, and 28.1±5.4 kg.m) were randomized into 2 groups: one that performed RT with a CT load (n = 16) and another group that performed RT in an ascending PR fashion (n = 17). Outcomes included 1 repetition maximum (RM) tests and assessment of skeletal muscle mass estimated by dual energy X-ray absorptiometry...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120983/assessing-differences-in-anthropometric-and-fitness-characteristics-between-police-academy-cadets-and-incumbent-officers
#15
Robin Orr, J Jay Dawes, Rodney Pope, Joseph Terry
The physical fitness of police officers must be developed in new cadets and sustained in incumbent officers. The aims of this study were to profile and compare the anthropometric and fitness characteristics of police academy cadets and incumbent officers of varying ages from a single police force. Retrospective data for 84 police academy cadets (♂=66, mean age=27.96±5.73 yrs; ♀=18, mean age=30.50±5.76 yrs) and 80 incumbent police officers (♂=73, mean age=39.43±8.28 yrs; ♀=7, mean age=37.86±3.67 yrs) were compiled...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120982/total-and-segmental-body-composition-examination-in-collegiate-football-players-using-multifrequency-bia-and-dxa
#16
Christiana J Raymond, Donald R Dengel, Tyler A Bosch
The current study examined the influence of player position on the agreement between multi-frequency bioelectrical impedance analysis (MfBIA) and dual X-ray absorptiometry (DXA) when assessing total and segmental percent body fat (BF%), fat mass (FM), and fat-free mass (FFM) in NCAA Division I collegiate football athletes. Forty-four male collegiate athletes (age=19±1 yrs; height=1.9±1.0 m; weight=106.4±18.8 kg) participated. Player positions included: offensive linemen (OL; n=7), tight ends (TE; n=4), wide receivers (WR; n=9), defensive linemen (DL; n=6), defensive backs (DB; n=8), linebackers (LB; n=6), and running backs (RB; n=4)...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120981/biomechanical-methods-to-quantify-muscle-effort-during-resistance-exercise
#17
Loren Z F Chiu
Muscle hypertrophy and strength adaptations elicited by resistance training dependent on the force exerted by active muscles. As an exercise may use many muscles, determining force for individual muscles or muscle groupings is important to understand the relation between an exercise and these adaptations. Muscle effort - the amount of force or a surrogate measure related to the amount of force exerted during a task - can be quantified using biomechanical methods. The purpose of this review was to summarize the biomechanical methods used to estimate muscle effort in movements, particularly resistance training exercises...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120980/effect-of-cold-water-immersion-on-elbow-flexors-muscle-thickness-after-resistance-training
#18
Filipe Matos, Eduardo Borba Neves, Claudio Rosa, Victor Machado Reis, Francisco Saavedra, Severiano Silva, José Vilaça-Alves
Cold Water Immersion (CWI) is commonly applied in order to speed up the recovery process after exercise. Muscle damage may induce a performance reduction, consequence of the intramuscular pressure induced by the muscular swelling. The aim of the study was to verify the CWI effects on muscle thickness (MT) behavior of the elbow flexors after a strength training protocol (ST). Eleven males were submitted to a RT, performed in two different weeks. In one of the weeks, subjects experienced a passive recovery. In the other, subjects were submitted to a CWI (20 min at 5C-10°C)...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120979/asymmetries-in-isometric-force-time-charcteristics-are-not-detrimental-to-change-of-direction-speed
#19
Thomas Dos'Santos, Christopher Thomas, Paul A Jones, Paul Comfort
The purpose of this study was to determine the impact of between limb asymmetries in IMTP force-time characteristics on change of direction speed (CODS). Twenty multisport collegiate athletes (mean ± SD: age: 21.0 ± 1.9 years; mass: 78.7 ± 8.9 kg; height: 1.77 ± 0.04 m) performed three unilateral stance IMTP trials per limb and three modified 505 CODS trials each side to establish imbalances between left and right, and dominant (D) and non-dominant (ND) limbs. Limb dominance was defined as the limb that produced the highest isometric force-time value or faster CODS performance...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120978/effect-of-load-carriage-on-tactical-performance-in-swat-operators
#20
J Matthew Thomas, Michael B Pohl, Robert Shapiro, Jason Keeler, Mark G Abel
Special Weapons and Tactics (SWAT) operators are specially trained personnel that are required to carry equipment to perform high risk tasks. Given the need to carry this equipment, it is important to understand the potentially deleterious effect that the additional load may have on tactical performance. Furthermore, it is important to identify physical fitness characteristics that are associated with the potential decrement in performance. Therefore, the purpose of this study was to evaluate the effect of load carriage on tactical physical ability and marksmanship, and to identify fitness characteristics associated with any decrement in performance...
November 6, 2017: Journal of Strength and Conditioning Research
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