Journal of strength and conditioning research: the research journal of the NSCA

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  Año 2021, Vol. 35, Número 5

  • Research Notes

    • Impulse-Based Dynamic Strength Index: Considering Time-Dependent Force Expression

      Michael H. Haischer, John Krzyszkowski, Stuart Roche, Kristof Kipp

      • Resumen

      págs. 1177-1181

      

    • Relationship Between External Load and Self-Reported Wellness Measures Across a Men's Collegiate Soccer Preseason

      Jennifer B. Fields, Diane M. Lameira, Jerome L. Short, Justin J. Merrigan, Sina Gallo, Jason B. White, Margaret T. Jones

      • Resumen

      págs. 1182-1186

      

  • Original Research

    • Effects of a Flexible Workout System on Performance Gains in Collegiate Athletes

      Cory T. Walts, Sabrina M. Murphy, David J. Stearne, Randall H. Rieger, Kenneth P. Clark

      • Resumen

      págs. 1187-1193

      

    • Blood Flow Restriction Does Not Promote Additional Effects on Muscle Adaptations When Combined With High-Load Resistance Training Regardless of Blood Flow Restriction Protocol

      Emerson Luiz Teixeira, Carlos Ugrinowitsch, Vitor de Salles Painelli, Carla Silva-Batista, André Y. Aihara, Fabiano Nassar Cardoso, Hamilton Roschel, Valmor Tricoli

      • Resumen

      págs. 1194-1200

      

    • Hip and Knee Extensor Activation During the Hip Thrust and Rear-Foot-Elevated Split Squat in Trained Females

      Kevin W. McCurdy, John L. Walker, Camila Kelly, Michael Polinski

      • Resumen

      págs. 1201-1207

      

    • Potentiating Effects of Accentuated Eccentric Loading Are Dependent Upon Relative Strength

      Justin J. Merrigan, James J. Tufano, Margaret T. Jones

      • Resumen

      págs. 1208-1216

      

    • Exploring the Utility of Performing a Down Set as a Postactivation Potentiation Strategy

      Hanson Wong, Jeremy A. Gentles, Caleb D. Bazyler, Michael W. Ramsey

      • Resumen

      págs. 1217-1222

      

    • Relative Age Effects in Elite Olympic Weightlifters

      Jonathan M. Kollars, Christopher Brian Taber, Kyle S. Beyer

      • Resumen

      págs. 1223-1228

      

    • Postactivation Potentiation Effect of Heavy Sled Towing on Subsequent Sprints

      Jason J. Williams, Robert L. Herron, Brandon Spradley, Patrick Saracino

      • Resumen

      págs. 1229-1233

      

    • Common Vertical Jump and Reactive Strength Index Measuring Devices: A Validity and Reliability Analysis

      Samuel Montalvo, Matthew P. González, Martin S. Dietze-Hermosa, Jeffrey D. Eggleston, Sandor Dorgo

      • Resumen

      págs. 1234-1243

      

    • Implementation and Efficacy of Plyometric Training: Bridging the Gap Between Practice and Research

      Casey M. Watkins, Adam Storey, Michael R. McGuigan, Nicholas D. Gill

      • Resumen

      págs. 1244-1255

      

    • Supplemental Creatine Modified With Polyethylene Glycol Effectively Loads Skeletal Muscle With Lower Doses

      Andrew C. Fry, Mandy E. Parra, Dimitrije Cabarkapa

      • Resumen

      págs. 1256-1261

      

    • Physiological Impact of a Single Serving Slow Absorption Carbohydrate on Metabolic, Hemodynamic, and Performance Markers in Endurance Athletes During a Bout of Exercise

      Patrick M. Davitt, Catherine Saenz, Troy Hartman, Phil Barone, Steven Estremera

      • Resumen

      págs. 1262-1272

      

    • Comparisons of Daily Energy Intake vs. Expenditure Using the GeneActiv Accelerometer in Elite Australian Football Athletes

      Brie S. Salagaras, Kristen L. MacKenzie-Shalders, Maximillian J. Nelson, Francois Fraysse, Thomas P. Wycherley, Gary J. Slater, Chris McLellan, Kuldeep Kumar, Vernon G. Coffey

      • Resumen

      págs. 1273-1278

      

    • A 5-day Heat Acclimation Program Improves Heat Stress Indicators While Maintaining Exercise Capacity

      Floris C. Wardenaar, Carmen P. Ortega Santos, Kaila A.S. Vento, Joshua S. Beaumont, Stephanie C. Griffin, Carol S. Johnston, Stavros A. Kavouras

      • Resumen

      págs. 1279-1286

      

    • Skeletal Muscle Mass and Fat Mass Relationships With Physical Fitness Test Performance in Law Enforcement Recruits Before Academy

      Robert G. Lockie, Blake N. Carlock, Tomas J. Ruvalcaba, Joseph M. Dulla, Robin M. Orr, J. Jay Dawes, Megan B. McGuire

      • Resumen

      págs. 1287-1295

      

    • Neuromuscular Performance and Hormonal Responses to Military Operational Stress in Men and Women

      William R. Conkright, Meaghan E. Beckner, Aaron M. Sinnott, Shawn R. Eagle, Brian J. Martin, Alice D. Lagoy, Felix Proessl, Mita T. Lovalekar, Tim L.A. Doyle, Phil Agostinelli, Nicole M. Sekel, Shawn D. Flanagan, Anne Germain, Christopher Connaboy, Bradley C. Nindl

      • Resumen

      págs. 1296-1305

      

    • Relationships Between Sprinting, Broad Jump, and Vertical Jump Kinetics Are Limited in Elite, Collegiate Football Athletes

      Joseph B. Boone, Trisha A. VanDusseldorp, Yuri Feito, Gerald T. Mangine

      • Resumen

      págs. 1306-1316

      

    • Neuromuscular, Endocrine, and Perceptual Recovery After a Youth American Football Game

      Jon-Kyle Davis, Anthony S. Wolfe, Steven A. Basham, Eric C. Freese, Peter John D. De Chavez

      • Resumen

      págs. 1317-1325

      

    • The Relationships Between Perceived Wellness, Sleep, and Acute: Chronic Training Load in National Collegiate Athletics Association Division I Male Soccer Players

      Yasuki Sekiguchi, Ryan M. Curtis, Robert A. Huggins, Courteney L. Benjamin, Alan J. Walker, Shawn M. Arent, Narayan S. Hosmane, Travis Anderson, Douglas J. Casa

      • Resumen

      págs. 1326-1330

      

    • Relationships Between Clinically Measured Upper-Extremity Physical Characteristics and Ball Spin Rate in Professional Baseball Pitchers

      Regan H. Wong, Kevin G. Laudner, Daniel Evans, Luke Miller, Trent Blank, Keith Meister

      • Resumen

      págs. 1331-1337

      

    • Changes in Neuromuscular Status Across a Season of Professional Men's Ice Hockey

      Edward A. Gannon, Dean G. Higham, Bryan W. Gardner, Nan Nan, Jiwei Zhao, Leslie J. Bisson

      • Resumen

      págs. 1338-1344

      

    • Stretch-Shortening Cycle Potentiation and Resistance Training-Induced Changes in Walking Economy/Ease and Activity-Related Energy Expenditure in Older Women

      Gary R. Hunter, Harshvardhan Singh, Catia Martins, Marissa N. Baranauskas, Stephen J. Carter

      • Resumen

      págs. 1345-1349

      

    • Resistance Training, Fatigue, Quality of Life, Anxiety in Breast Cancer Survivors

      Rafael F. Moraes, João B. Ferreira-Junior, Vitor Alves Marques, Amilton Vieira, Claudio A.B. Lira, Mario H. Campos, Ruffo Freitas-Junior, Rosemar M.S. Rahal, Paulo Gentil, Carlos Alexandre Vieira

      • Resumen

      págs. 1350-1356

      

    • Postactivation Potentiation Improves Acute Resistance Exercise Performance and Muscular Force in Trained Men

      Marcelo Conrado de Freitas, Fabrício E. Rossi, Lucas Antonio Colognesi, Joao Vitor N.S. de Oliveira, Nelo Eidy Zanchi, Fábio Santos Lira, Jason M. Cholewa, Luis A. Gobbo

      • Resumen

      págs. 1357-1363

      

    • Hip and Knee Kinetics During a Back Squat and Deadlift

      Kevin H. Choe, Jared W. Coburn, Pablo B. Costa, Derek N. Pamukoff

      • Resumen

      págs. 1364-1371

      

    • Resistance Training Performed to Failure or Not to Failure Results in Similar Total Volume, but With Different Fatigue and Discomfort Levels

      Wanderson Santos, Carlos Alexandre Vieira, Martim Bottaro, Vitoria A. Nunes, Rodrigo Ramírez Campillo, James Steele, James P. Fisher, Paulo Gentil

      • Resumen

      págs. 1372-1379

      

    • Influence of the ACTN3 Genotype and the Exercise Intensity on the Respiratory Exchange Ratio and Excess Oxygen Consumption After Exercise

      Hugo de luca Corrêa, Athila T. D. Maya, Rodrigo Neves, Milton R. Moraes, Ricardo M. Lima, Otávio Nóbrega, Aparecido Pimentel Ferreira

      • Resumen

      págs. 1380-1388

      

    • Salivary Immunoglobulin A Secretion Rate During Peak Period Conditioning Regimens in Triathletes

      Megumi Matsumoto, Kentaro Satoh, Hidehiko Kushi, Koji Hamuro, Masao Sakurai, Hiroshi Saito, Ryohei Tanaka, Takao Saito, Noriyuki Kohda, Koichiro Hamada

      • Resumen

      págs. 1389-1396

      

    • Repeated Incremental Workbouts Separated by 1 Hour Increase the Electromyographic Fatigue Threshold

      Nate Bremer, Gavin Peoples, Brent Hasler, Robert Litzenburg, Andrew Johnson, Moh H. Malek

      • Resumen

      págs. 1397-1402