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Journal of Strength and Conditioning Research

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https://www.readbyqxmd.com/read/29781941/cardiopulmonary-demand-of-16-kg-kettlebell-snatches-in-simulated-girevoy-sport
#1
Margaux Chan, Martin J MacInnis, Sarah Koch, Kristin E MacLeod, Keith R Lohse, Maria E Gallo, A William Sheel, Michael S Koehle
Chan, M, MacInnis, MJ, Koch, S, MacLeod, KE, Lohse, KR, Gallo, ME, Sheel, AW, and Koehle, MS. Cardiopulmonary demand of 16-kg kettlebell snatches in simulated Girevoy Sport. J Strength Cond Res XX(X): 000-000, 2018-Kettlebell lifting has become popular both as a strength and conditioning training tool and as a sport in and of itself: Girevoy Sport (GS). Although several kettlebell multimovement protocols have been analyzed, little research has attempted to quantify the aerobic stimulus of the individual events in GS, which could better inform kettlebell-related exercise prescription...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781940/alpha-actinin-3-r577x-polymorphism-influences-muscle-damage-and-hormonal-responses-after-a-soccer-game
#2
Daniel B Coelho, Eduardo M Pimenta, Izinara C Rosse, Christiano Veneroso, Guilherme De Azambuja Pussieldi, Lenice K Becker, Emerson C Oliveira, Maria R S Carvalho, Emerson Silami-Garcia
Coelho, DB, Pimenta, EM, Rosse, IC, Veneroso, C, Pussieldi, GDA, Becker, LK, De Oliveira, EC, Carvalho, MRS, and Silami-Garcia, E. Alpha-actinin-3 R577X polymorphism influences muscle damage and hormonal responses after a soccer game. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to evaluate indicators of muscle damage and hormonal responses after soccer matches and its relation to alpha-actinin-3 (ACTN3) gene expression (XX vs. RR/RX), considering that the R allele produces alpha-actinin-3 and provides greater muscle strength and power...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781939/order-effects-of-resistance-and-stretching-exercises-on-heart-rate-variability-and-blood-pressure-in-healthy-adults
#3
Gleisson da Silva Araujo, David G Behm, Estêvão Rios Monteiro, Aline Gomes Ferreira de Melo Fiuza, Thiago Matassoli Gomes, Jefferson Macedo Vianna, Michel Silva Reis, Jefferson da Silva Novaes
da Silva Araujo, G, Behm, DG, Monteiro, ER, de Melo Fiuza, AGF, Gomes, TM, Vianna, JM, Reis, MS, and da Silva Novaes, J. Order effects of resistance and stretching exercises on heart rate variability and blood pressure in healthy adults. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to compare the acute effect of different combinations and order of resistance exercise (RE) and stretching exercise (SE) on heart rate variability, systolic blood pressure (SBP), and diastolic blood pressure (DBP)...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781938/physical-demands-of-amateur-domestic-and-representative-netball-in-one-season-in-new-zealand-assessed-using-heart-rate-and-movement-analysis
#4
Doug A King, Cloe Cummins, Patria A Hume, Trevor N Clark
King, DA, Cummins, C, Hume, PA, and Clark, TN. Physical demands of amateur domestic and representative netball in one season in New Zealand assessed using heart rate and movement analysis. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this descriptive cohort study was to describe physical demands of netball for positions and between playing levels using microtechnology. Data were collected from 34 female netball players across 3 teams at different levels (over 19 years representative [O19], under 19 years representative [U19], and open-age amateur club domestic) for 20 games using heart rate and microtechnology data...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781937/body-composition-assessment-in-female-national-collegiate-athletic-association-division-i-softball-athletes-as-a-function-of-playing-position-across-a-multiyear-time-frame
#5
Ashley Peart, Danielle Wadsworth, Jessica Washington, Gretchen Oliver
Peart, A, Wadsworth, D, Washington, J, and Oliver, G. Body composition assessment in female National Collegiate Athletic Association division I softball athletes as a function of playing position across a multiyear time frame. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to record changes in total body mass, lean body mass (LBM), fat mass (FM), and body fat percentage (BF%) in female National Collegiate Athletic Association (NCAA) Division I level softball athletes over a multiyear time frame using dual-energy x-ray absorptiometry (iDXA)...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781935/balance-training-reduces-postural-sway-and-improves-sport-specific-performance-in-visually-impaired-cross-country-skiers
#6
Alexander Kurz, Benedikt Lauber, Steffen Franke, Christian Leukel
Kurz, A, Lauber, B, Franke, S, and Leukel, C. Balance training reduces postural sway and improves sport-specific performance in visually impaired cross-country skiers. J Strength Cond Res XX(X): 000-000, 2018-Balance training is highly effective in reducing sport injuries and causes improvements in postural stability and rapid force production. So far, the positive effects of balance training have been described for healthy athletes. In the present experiments, we questioned whether athletes with disabilities of the visual system can also benefit from balance training...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781934/absolute-reliability-and-concurrent-validity-of-the-stryd-system-for-the-assessment-of-running-stride-kinematics-at-different-velocities
#7
Felipe García-Pinillos, Luis E Roche-Seruendo, Noel Marcén-Cinca, Luis A Marco-Contreras, Pedro A Latorre-Román
García-Pinillos, F, Roche-Seruendo, LE, Marcen-Cinca, N, Marco-Contreras, LA, and Latorre-Román, PA. Absolute reliability and concurrent validity of the Stryd system for the assessment of running stride kinematics at different velocities. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to determine the absolute reliability and to evaluate the concurrent validity of the Stryd system for measuring spatiotemporal variables during running at different velocities (8-20 km·h) by comparing data with another widely used device (the OptoGait system)...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781933/repeated-exposure-to-taekwondo-combat-modulates-the-physiological-and-hormonal-responses-to-subsequent-bouts-and-recovery-periods
#8
Craig A Bridge, Andy S Sparks, Lars R McNaughton, Graeme L Close, Matheus Hausen, Jonas Gurgel, Barry Drust
Bridge, CA, Sparks, SA, McNaughton, LR, Close, GL, Hausen, M, Gurgel, J, and Drust, B. Repeated exposure to taekwondo combat modulates the physiological and hormonal responses to subsequent bouts and recovery periods. J Strength Cond Res XX(X): 000-000, 2018-This study examined the physiological and hormonal responses to successive taekwondo combats using an ecologically valid competition time structure. Ten elite male international taekwondo competitors (age 19 ± 3 years) took part in a simulated championship event...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781936/influence-of-adding-single-joint-exercise-to-a-multijoint-resistance-training-program-in-untrained-young-women
#9
Matheus Barbalho, Paulo Gentil, Rodolfo Raiol, James Fisher, James Steele, Victor Coswig
Barbalho, M, Gentil, P, Raiol, R, Fisher, J, Steele, J, and Coswig, V. Influence of adding single-joint exercise to a multijoint resistance training program in untrained young women. J Strength Cond Res XX(X): 000-000, 2018-The aim of the present study was to investigate the effects of adding single-joint (SJ) exercises to a multijoint (MJ) resistance training (RT) program on muscle strength and anthropometric measures of young women. Twenty untrained women were divided into a group that performed only MJ exercises or a group that performed both SJ and MJ exercises (MJ + SJ)...
May 15, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781942/effort-index-as-a-novel-variable-for-monitoring-the-level-of-effort-during-resistance-exercises
#10
David Rodríguez-Rosell, Juan M Yáñez-García, Julio Torres-Torrelo, Ricardo Mora-Custodio, Mário C Marques, Juan J González-Badillo
Rodríguez-Rosell, D, Yáñez-García, JM, Torres-Torrelo, J, Mora-Custodio, R, Marques, MC, and González-Badillo, JJ. Effort index as a novel variable for monitoring the level of effort during resistance exercises. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to analyze the acute mechanical and metabolic response to resistance exercise protocols (REPs) defined by 2 variables: the first repetition's mean velocity and the percentage of velocity loss (%VL) over the set. The product of these 2 variables was termed the effort index (EI) and was used as an indicator of the degree of fatigue induced during each REP...
May 11, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742750/a-systematic-review-on-the-effectiveness-of-active-recovery-interventions-on-athletic-performance-of-professional-collegiate-and-competitive-level-adult-athletes
#11
Robert O Ortiz, Amanda J Sinclair Elder, Craig L Elder, J Jay Dawes
OrtizJr, RO, Sinclair Elder, AJ, Elder, CL, and Dawes, JJ. A systematic review on the effectiveness of active recovery interventions on athletic performance of professional-, collegiate-, and competitive-level adult athletes. J Strength Cond Res XX(X): 000-000, 2018-Active recovery (AR) is a popular approach to enhancing athlete recovery from participation through physical action, and it has a perceived benefit in the recovery of athletes' enhancement of postexertional physiological status; however, it is unclear whether these recovery techniques enhance athletic performance...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742749/the-relationship-between-asymmetry-and-athletic-performance-a-critical-review
#12
Sean J Maloney
Maloney, SJ. The relationship between asymmetry and athletic performance: A critical review. J Strength Cond Res XX(X): 000-000, 2018-Symmetry may be defined as the quality to demonstrate an exact correspondence of size, shape, and form when split along a given axis. Although it has been widely asserted that the bilateral asymmetries are detrimental to athletic performance, research does not wholly support such an association. Moreover, the research rarely seeks to distinguish between different types of bilateral asymmetry...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742748/planning-training-workload-in-football-using-small-sided-games-density
#13
Sebastien Sangnier, Thierry Cotte, Olivier Brachet, Jeremy Coquart, Claire Tourny
Sangnier, S, Cotte, T, Brachet, O, Coquart, J, and Tourny, C. Planning training workload in football using small-sided games density. J Strength Cond Res XX(X): 000-000, 2018-To develop the physical qualities, the small-sided games' (SSGs) density may be essential in soccer. Small-sided games are games in which the pitch size, players' number, and rules are different to those for traditional soccer matches. The purpose was to assess the relation between training workload and SSGs' density. The 33 densities data (41 practice games and 3 full games) were analyzed through global positioning system (GPS) data collected from 25 professional soccer players (80...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742747/improving-the-signal-to-noise-ratio-when-monitoring-countermovement-jump-performance
#14
Rodney A Kennedy, David Drake
Kennedy, RA and Drake, D. Improving the signal-to-noise ratio when monitoring countermovement jump performance. J Strength Cond Res XX(X): 000-000, 2018-Countermovement jump (CMJ) performance has been routinely used to monitor neuromuscular status. However, the protocol used to establish the criterion score is not well documented. The purpose of this study was to examine how the protocol used would influence of the sensitivity of CMJ variables in rugby union players. Fifteen male (age: 19.7 ± 0.5 years) rugby union players performed 8 CMJs on 2 occasions, separated by 7 days...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742746/comparison-of-psychological-and-physiological-responses-to-imposed-vs-self-selected-high-intensity-interval-training
#15
Erin Kellogg, Cheyann Cantacessi, Olivia McNamer, Heather Holmes, Robert von Bargen, Richard Ramirez, Daren Gallagher, Stacy Vargas, Ben Santia, Karen Rodriguez, Todd A Astorino
Kellogg, E, Cantacessi, C, McNamer, O, Holmes, H, von Bargen, R, Ramirez, R, Gallagher, D, Vargas, S, Santia, B, Rodriguez, K, and Astorino, TA. Comparison of psychological and physiological responses to imposed vs. self-selected high-intensity interval training. J Strength Cond Res XX(X): 000-000, 2018-High-intensity interval training elicits similar physiological adaptations as moderate intensity continuous training (MICT). Some studies report greater enjoyment to a bout of high-intensity interval exercise (HIIE) vs...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742745/validity-and-reliability-of-a-wearable-inertial-sensor-to-measure-velocity-and-power-in-the-back-squat-and-bench-press
#16
Samuel T Orange, James W Metcalfe, Andreas Liefeith, Phil Marshall, Leigh A Madden, Connor R Fewster, Rebecca V Vince
Orange, ST, Metcalfe, JW, Liefeith, A, Marshall, P, Madden, LA, Fewster, CR, and Vince, RV. Validity and reliability of a wearable inertial sensor to measure velocity and power in the back squat and bench press. J Strength Cond Res XX(X): 000-000, 2018-This study examined the validity and reliability of a wearable inertial sensor to measure velocity and power in the free-weight back squat and bench press. Twenty-nine youth rugby league players (18 ± 1 years) completed 2 test-retest sessions for the back squat followed by 2 test-retest sessions for the bench press...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742744/examination-of-self-myofascial-release-vs-instrument-assisted-soft-tissue-mobilization-techniques-on-vertical-and-horizontal-power-in-recreational-athletes
#17
Debra A Stroiney, Rebecca L Mokris, Gary R Hanna, John D Ranney
Stroiney, DA, Mokris, RL, Hanna, GR, and Ranney, JD. Examination of self-myofascial release vs. instrument-assisted soft-tissue mobilization techniques on vertical and horizontal power in recreational athletes. J Strength Cond Res XX(X): 000-000, 2018-This study examined whether pre-exercise self-myofascial release (SMR) and instrument-assisted soft-tissue mobilization (IASTM) would improve performance on measures of vertical jump height and 40-yd sprint time. Differences in perceived pain levels were also examined...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29746389/effect-of-sand-on-knee-load-during-a-single-leg-jump-task-implications-for-injury-prevention-and-rehabilitation-programs
#18
Mark C Richardson, Sinead Murphy, Tom Macpherson, Bryan English, Iain Spears, Paul Chesterton
Richardson, MC, Murphy, S, Macpherson, T, English, B, Spears, I, and Chesterton, P. Effect of sand on knee load during a single-leg jump task: implications for injury prevention and rehabilitation programs. J Strength Cond Res XX(X): 000-000, 2018-The purpose of the study was to determine potential differences in landing strategies and subsequent joint loads at the knee (knee abduction moment [KAM], anterior-posterior [AP] tibial translation, and total knee shear force) when jumping onto sand and firm ground from both a level surface and a 30-cm height...
May 7, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29746388/effect-of-high-dose-short-duration-%C3%AE-alanine-supplementation-on-circulating-il-10-concentrations-during-intense-military-training
#19
Jay R Hoffman, Yftach Gepner, Mattan W Hoffman, Hila Zelicha, Shachar Shapira, Ishay Ostfeld
Hoffman, JR, Gepner, Y, Hoffman, M, Zelicha, H, Shapira, S, and Ostfeld, I. Effect of high dose, short-duration β-alanine supplementation on circulating IL-10 concentrations during intense military training. J Strength Cond Res XX(X): 000-000, 2018-This study examined the effect of β-alanine as a potential anti-inflammatory agent during intense military training. Twenty soldiers (20.1 ± 0.6 years) from an elite combat unit were randomly assigned to either a β-Alanine (BA) or placebo (PL) group. Soldiers were provided with 12 g·d of either BA or PL for 7 days between 2 intensive periods of navigational training and restricted sleep...
May 7, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29746387/updating-the-skating-multistage-aerobic-test-and-correction-for-v-combining-dot-above-o2max-prediction-using-a-new-skating-economy-index-in-elite-youth-ice-hockey-players
#20
Maxime Allisse, Hung Tien Bui, Luc Léger, Alain-Steve Comtois, Mario Leone
Allisse, M, Bui, HT, Léger, L, Comtois, A-S, and Leone, M. Updating the skating multistage aerobic test and correction for V[Combining Dot Above]O2max prediction using a new skating economy index in elite youth ice hockey players. J Strength Cond Res XX(X): 000-000, 2018-A number of field tests, including the skating multistage aerobic test (SMAT), have been developed to predict V[Combining Dot Above]O2max in ice hockey players. The SMAT, like most field tests, assumes that participants who reach a given stage have the same oxygen uptake, which is not usually true...
May 7, 2018: Journal of Strength and Conditioning Research
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