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Journal of Strength and Conditioning Research

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https://www.readbyqxmd.com/read/30024485/effects-of-endurance-exercise-bouts-in-hypoxia-hyperoxia-and-normoxia-on-mtor-related-protein-signaling-in-human-skeletal-muscle
#1
Axel Przyklenk, Thorben Aussieker, Boris Gutmann, Thorsten Schiffer, Christian Brinkmann, Heiko K Strüder, Wilhelm Bloch, Andreas Mierau, Sebastian Gehlert
Przyklenk, A, Aussieker, T, Gutmann, B, Schiffer, T, Brinkmann, C, Strüder, HK, Bloch, W, Mierau, A, and Gehlert, S. Effects of endurance exercise bouts in hypoxia, hyperoxia, and normoxia on mTOR-related protein signaling in human skeletal muscle. J Strength Cond Res XX(X): 000-000, 2018-This study investigated the effects of short-term hypoxia (HY), hyperoxia (PER), and normoxia on anabolic signaling proteins in response to an acute bout of moderate endurance exercise (EEX) before and after an endurance exercise training intervention...
July 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30024484/prior-knowledge-of-the-grading-criteria-increases-functional-movement-screen-scores-in-youth-soccer-players
#2
Anthony Bryson, Rosemary Arthur, Chris Easton
Bryson, A, Arthur, R, and Easton, C. Prior knowledge of the grading criteria increases Functional Movement Screen scores in youth soccer players. J Strength Cond Res XX(X): 000-000, 2018-We sought to determine whether familiarity with the grading criteria of the Functional Movement Screen (FMS) impacted the outcome score in elite youth soccer players. Thirty-two trained male youth soccer players (aged 17 ± 1 years) participated in a randomized control trial. Participants were randomly assigned to evenly sized control and experimental groups, who each completed the FMS on 2 separate occasions...
July 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30024483/biochemical-and-muscle-mechanical-postmarathon-changes-in-hot-and-humid-conditions
#3
Randall Gutiérrez-Vargas, Saúl Martín-Rodríguez, Braulio Sánchez-Ureña, Alejandro Rodríguez-Montero, Jorge Salas-Cabrera, Juan C Gutiérrez-Vargas, Bostjan Simunic, Daniel Rojas-Valverde
Gutiérrez-Vargas, R, Martín-Rodríguez, S, Sánchez-Ureña, B, Rodríguez-Montero, A, Salas-Cabrera, J, Gutiérrez-Vargas, JC, Simunic, B, and Rojas-Valverde, D. Biochemical and muscle mechanical postmarathon changes in hot and humid conditions. J Strength Cond Res XX(X): 000-000, 2018-The aim of this study was to compare biochemical changes and mechanical changes in the lower-limb muscles before and after a marathon race in hot and humid conditions. Eighteen healthy runners participated in a marathon at between 28 and 34° C and 81% humidity in Costa Rica...
July 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30024482/effects-of-an-upper-body-training-program-involving-resistance-exercise-and-high-intensity-arm-cranking-on-peak-handcycling-performance-and-wheelchair-propulsion-efficiency-in-able-bodied-men
#4
Dhissanuvach Chaikhot, Katherine Reed, Wannakarn Petroongrad, Fotios Athanasiou, Daan van Kooten, Florentina J Hettinga
Chaikhot, D, Reed, K, Petroongrad, W, Athanasiou, F, van Kooten, D, and Hettinga, FJ. Effects of an upper-body training program involving resistance exercise and high-intensity arm cranking on peak handcycling performance and wheelchair propulsion efficiency in able-bodied men. J Strength Cond Res XX(X): 000-000, 2018-The aim of this study was to determine the training effects of an upper-body training program involving resistance exercise and high-intensity arm cranking on peak handcycling performance, propulsion efficiency, and biomechanical characteristics of wheelchair propulsion in able-bodied men...
July 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30024481/acute-effects-of-battle-rope-exercise-on-performance-blood-lactate-levels-perceived-exertion-and-muscle-soreness-in-collegiate-basketball-players
#5
Wei-Han Chen, Wen-Wen Yang, Yi-Hua Lee, Huey-June Wu, Chen-Fu Huang, Chiang Liu
Chen, WH, Yang, WW, Lee, YH, Wu, HJ, Huang, CF, and Liu, C. Acute effects of battle rope exercise on performance, blood lactate levels, perceived exertion, and muscle soreness in collegiate basketball players. J Strength Cond Res XX(X): 000-000, 2018-This study investigated the acute effects of battle rope (BR) exercise on basketball players' performance, blood lactate levels, rating of perceived exertion (RPE), and perceived muscle soreness. Fifteen well-trained Division-I male basketball players underwent the same test procedure at baseline, before BR exercise (30 minutes of rest after the baseline test), and after BR exercise...
July 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/30024480/effect-of-varying-self-myofascial-release-duration-on-subsequent-athletic-performance
#6
Jake Phillips, David Diggin, Deborah L King, Gary A Sforzo
Phillips, J, Diggin, D, King, DL, and Sforzo, GA. Effect of varying self-myofascial release duration on subsequent athletic performance. J Strength Cond Res XX(X): 000-000, 2018-Self-myofascial release (SMR) treatments can enhance joint range-of-motion and restore movement function. The effects of different SMR durations on athletic performance have yet to be examined. Twenty-four volunteers had ankle and knee joint range-of-motion assessed using modified weight-bearing and kneeling lunge (KL) tests. Vertical jump and pro-agility sprint performance were also examined...
July 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29995693/influence-of-acute-concurrent-exercise-performed-in-public-fitness-facilities-on-ambulatory-blood-pressure-among-older-adults-in-rio-de-janeiro-city
#7
Ricardo Cordeiro, Walace Monteiro, Felipe Cunha, Linda S Pescatello, Paulo Farinatti
Cordeiro, R, Monteiro, W, Cunha, F, Pescatello, LS, and Farinatti, P. Influence of acute concurrent exercise performed in public fitness facilities on ambulatory blood pressure among older adults in Rio de Janeiro city. J Strength Cond Res XX(X): 000-000, 2018-The project "Third-Age Academies'" (TAAs) is a public policy providing supervised physical activities to over 40,000 seniors at open-access facilities (squares etc.) in Rio de Janeiro, Brazil. We investigated whether TAA concurrent exercise circuit induced postexercise hypotension (PEH) in individuals older than 60 years...
July 9, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29995692/match-running-performance-of-elite-soccer-players-v-combining-dot-above-o2max-and-players-position-influences
#8
Thomas I Metaxas
Metaxas, TI. Match running performance of elite soccer players: V[Combining Dot Above]O2max and players position influences. J Strength Cond Res XX(X): 000-000, 2018-The aims of this study were (a) to assess the relationship between laboratory-measured V[Combining Dot Above]O2max with total distance covered in a soccer match, (b) to assess the relationship between laboratory-measured V[Combining Dot Above]O2max with the distance covered at a different running intensity in a soccer match, (c) to quantify different intensity running in various playing positions, and (d) to determine the differences of running performance between halves...
July 9, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29995691/construct-validity-test-retest-reliability-and-repeatability-of-performance-variables-using-a-flywheel-resistance-training-device
#9
Lance M Bollinger, Jason T Brantley, Justin K Tarlton, Paul A Baker, Rebekah F Seay, Mark G Abel
Bollinger, LM, Brantley, JT, Tarlton, JK, Baker, PA, Seay, RF, and Abel, MG. Construct validity, test-retest reliability, and repeatability of performance variables using a flywheel resistance training device. J Strength Cond Res XX(X): 000-000, 2018-Power production is highly associated with physical performance; however, the ability to quantitatively measure power output during resistance exercise is lacking. The purpose of this study was to determine the validity and test-retest reliability of flywheel-based performance testing...
July 9, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29995690/relationships-between-eccentric-and-concentric-knee-strength-capacities-and-maximal-linear-deceleration-ability-in-male-academy-soccer-players
#10
Damian J Harper, Alastair R Jordan, John Kiely
Harper, DJ, Jordan, AR, and Kiely, J. Relationships between eccentric and concentric knee strength capacities and maximal linear deceleration ability in male academy soccer players. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to investigate the relationships between maximal linear deceleration ability, and knee flexor (KF) and knee extensor (KE) strength. Fourteen male academy soccer players completed a 30-m linear sprint, a maximal linear deceleration test, and eccentric and concentric KF and KE contractions in both dominant leg (DL) and nondominant leg (NDL) at slower (60°·s) and faster (180°·s) angular velocities on an isokinetic dynamometer...
July 9, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29995689/comparison-of-acute-energy-expenditure-and-rating-of-perceived-exertion-in-equivalent-bouts-of-circuit-training-and-treadmill-running
#11
Christi B Brewer, Breann M Booher, Nathaniel Lawton
Brewer, CB, Booher, BM, and Lawton, N. Comparison of acute energy expenditure and rating of perceived exertion in equivalent bouts of circuit training and treadmill running. J Strength Cond Res XX(X): 000-000, 2018-Circuit weight training (CT) maximizes exercise density, which may lead to an inaccurate perception of energy expenditure (EE). The purpose of this study was to compare acute EE indices and rating of perceived exertion (RPE) between CT and an equivalent bout of treadmill running (TR). College-aged men (n = 9) who regularly engaged in running and resistance training performed CT first...
July 9, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985228/pilates-method-training-functional-and-blood-glucose-responses-of-older-women-with-type-2-diabetes
#12
Karla Cinara Bezerra Melo, Flávio de Souza Araújo, Claudionor Cícero Mascêna Cordeiro Júnior, Karoline Teixeira Passos de Andrade, Sérgio Rodrigues Moreira
Melo, KCB, Araújo, FdS, Cordeiro Júnior, CCM, de Andrade, KTP, and Moreira, SR. Pilates method training: Functional and blood glucose responses of older women with type 2 diabetes. J Strength Cond Res XX(X): 000-000, 2018-The objective of the study was to investigate the effects of 12 weeks (wk) of Pilates method on the functional capacity (FC) and glycemic control of older women with type 2 diabetes (T2D). Twenty-two women with T2D were randomized into the control (CONTROL: 67.5 ± 6.3 years; 154.7 ± 6...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985227/partial-compared-with-full-range-of-motion-resistance-training-for-muscle-hypertrophy-a-brief-review-and-an-identification-of-potential-mechanisms
#13
Daniel E Newmire, Darryn S Willoughby
Newmire, DE and Willoughby, DS. Partial compared to full range of motion resistance training for muscle hypertrophy: A brief review and an identification of potential mechanisms. J Strength Cond Res XX(X): 000-000, 2018-Resistance training promotes skeletal muscle hypertrophy; there are specific recommendations of intensity, volume, and duration that appear to facilitate hypertrophy the greatest. However, currently, there is not a definitive consensus on optimal range of motion. It appears that the partial range of motion (pROM) mode of exercise may have some similar benefit on muscle hypertrophy as the conventional full range of motion (fROM)...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985226/improving-power-output-in-older-adults-using-plyometrics-in-a-body-mass-supported-treadmill
#14
Tyler J Dobbs, Shawn R Simonson, Scott A Conger
Dobbs, TJ, Simonson, SR, and Conger, SA. Improving power output in older adults using plyometrics in a body mass-supported treadmill. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to determine if performing plyometrics in a body mass-supported treadmill would lead to greater increases in power output and functional strength in older adults compared with traditional strength training. Twenty-three participants were randomized to strength (SG, n = 8), plyometric (PG, n = 8), or control (CG, n = 7) groups...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985225/measurement-of-cortisol-and-testosterone-in-athletes-accuracy-of-liquid-chromatography-tandem-mass-spectrometry-assays-for-cortisol-and-testosterone-measurement-in-whole-blood-microspecimens
#15
Maren S Fragala, Scott M Goldman, Mildred M Goldman, Caixia Bi, Julia D Colletti, Shawn M Arent, Alan J Walker, Nigel J Clarke
Fragala, MS, Goldman, SM, Goldman, MM, Bi, C, Colletti, JD, Arent, SM, Walker, AJ, and Clarke, NJ. Measurement of cortisol and testosterone in athletes: Accuracy of LC-MS/MS assays for cortisol and testosterone measurement in whole-blood microspecimens. J Strength Cond Res XX(X): 000-000, 2018-Biomarker monitoring provides insight into athletes' training tolerance but is limited by the need for office-based specimen collection. To facilitate self-collection during training, we developed liquid chromatography-tandem mass spectrometry-based tests that measure circulating total cortisol and testosterone using a finger stick volumetric absorptive microsampler...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985224/reliability-and-usefulness-of-time-motion-and-physiological-responses-in-simulated-judo-matches
#16
Emerson Franchini, Emily Dunn, Monica Y Takito
Franchini, E, Dunn, E, and Takito, MY. Reliability and usefulness of time-motion and physiological responses in simulated judo matches. J Strength Cond Res XX(X): 000-000, 2018-Match simulations have been used to investigate different interventions in judo. However, no study has assessed the reliability of actions performed and the physiological responses to the match and its usefulness. Thus, 2 studies were conducted to verify the reliability of time-motion and physiological responses to judo matches. In the first study, 25 judo athletes performed one 5-minute judo match simulation twice, 1 week apart, and had their heart rate and blood lactate measured...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985223/jump-training-in-rugby-union-players-barbell-or-hexagonal-bar
#17
Jonathon J S Weakley, Kevin Till, Dale B Read, Cedric Leduc, Gregory A B Roe, Padraic J Phibbs, Joshua Darrall-Jones, Ben Jones
Weakley, JJS, Till, K, Read, DB, Leduc, C, Roe, GAB, Phibbs, PJ, Darrall-Jones, J, and Jones, B. Jump training in rugby union players: barbell or hexagonal bar?. J Strength Cond Res XX(X): 000-000, 2018-The countermovement jump (CMJ) is an exercise that can develop athletic performance. Using the conventional barbell (BAR) and hexagonal barbell (HEX) while jumping, the intensity can be increased. However, the bar that provides greater adaptations is unknown. Therefore, this study aimed to assess changes in loaded and unloaded CMJ with either a BAR or HEX across a 4-week mesocycle in rugby union players...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985222/influence-of-situational-variables-team-formation-and-playing-position-on-match-running-performance-and-social-network-analysis-in-brazilian-professional-soccer-players
#18
Rodrigo Aquino, Christopher Carling, Luiz H Palucci Vieira, Guilherme Martins, Gustavo Jabor, João Machado, Paulo Santiago, Júlio Garganta, Enrico Puggina
Aquino, R, Carling, C, Palucci Vieira, LH, Martins, G, Jabor, G, Machado, J, Santiago, P, Garganta, J, and Puggina, E. Influence of situational variables, team formation, and playing position on match running performance and social network analysis of brazilian professional soccer players. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to investigate the independent and interactive effects of situational variables, opposition team formation, and playing position on running performance and network analysis in Brazilian professional soccer players (n = 22)...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985221/recent-advancements-in-our-understanding-of-the-ergogenic-effect-of-respiratory-muscle-training-in-healthy-humans-a-systematic-review
#19
Ren-Jay Shei
Shei, R-J. Recent advancements in our understanding of the ergogenic effect of respiratory muscle training in healthy humans: a systematic review. J Strength Cond Res XX(X): 000-000, 2018-Respiratory muscle training (RMT) has been shown to be an effective ergogenic aid for sport performance. Respiratory muscle training has been documented to improve performance in a wide range of exercise modalities including running, cycling, swimming, and rowing. The physiological effects of RMT that may explain the improvements in performance have been proposed to include diaphragm hypertrophy, muscle fiber-type switching, improved neural control of the respiratory muscles, increased respiratory muscle economy, attenuation of the respiratory muscle metaboreflex, and decreases in perceived breathlessness and exertion...
July 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29985220/isometric-midthigh-pull-characteristics-in-elite-youth-male-soccer-players-comparisons-by-age-and-maturity-offset
#20
Rhys O Morris, Ben Jones, Tony Myers, Jason Lake, Stacey Emmonds, Neil D Clarke, Dave Singleton, Matthew Ellis, Kevin Till
Morris, RO, Jones, B, Myers, T, Lake, J, Emmonds, S, Clarke, ND, Singleton, D, Ellis, M, and Till, K. Isometric midthigh pull characteristics in elite youth male soccer players: Comparisons by age and maturity offset. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to (a) provide comparative isometric midthigh pull (IMTP) force-time characteristics for elite youth soccer players and (b) determine the effect of age and maturation on IMTP force-time characteristics. Elite male youth soccer players (U12 n = 51; U13 n = 54; U14 n = 56; U15 n = 45; U16 n = 39; and U18 n = 48) across 3 maturity offset groups (Pre n = 117; circa n = 84; and Post-peak height velocity n = 92) performed 2 maximal IMTP trials on a portable force platform (1,000 Hz)...
July 4, 2018: Journal of Strength and Conditioning Research
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