Successful middle-distance (MD) running in distances from 800 m to 5000 m requires both rapid and economical movements. Athletes must sustain high running velocities at and above maximal aerobic speeds, 1 with sprint performance in the final lap of 1500-m races often determining medalists on the
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Assessments of Mechanical Stiffness and Relationships to Performance Determinants in Middle-Distance Runners
Simon A. Rogers, Chris S. Whatman, Simon N. Pearson, and Andrew E. Kilding
Enhancing the Initial Acceleration Performance of Elite Rugby Backs. Part I: Determining Individual Technical Needs
James J. Wild, Ian N. Bezodis, Jamie S. North, and Neil E. Bezodis
Sprint acceleration capacities of professional rugby backs are related to key performance indicators during matches and discriminate between playing standards. 1 – 3 This is logical since an increase in sprint acceleration capacity may increase the opportunities available for rugby backs to
Enhancing the Initial Acceleration Performance of Elite Rugby Backs. Part II: Insights From Multiple Longitudinal Individual-Specific Case-Study Interventions
James J. Wild, Ian N. Bezodis, Jamie S. North, and Neil E. Bezodis
Individualization is an important training principle for coaches. 1 , 2 However, the majority of scientific research investigating training interventions for sprint acceleration in team sport players has primarily reported group-based data, focusing on the mean effects of the same training program
The Advantages of Normalizing Electromyography to Ballistic Rather than Isometric or Isokinetic Tasks
Stephen M. Suydam, Kurt Manal, and Thomas S. Buchanan
peak EMG signal reliability. EMG signals from these dynamic movements (isokinetic, sprint and jump) will be compared to a constrained MVIC case. We hypothesize that the peak EMG during the ballistic tasks will be as repeatable as the MVIC, but with a greater magnitude. The single session, within
Vertical Jump Testing in Rugby League: A Rationale for Calculating Take-Off Momentum
John J. McMahon, Jason P. Lake, Nicholas J. Ripley, and Paul Comfort
The countermovement jump (CMJ) has been suggested to be an important test in rugby league (RL). 1 The support for including the CMJ as part of RL physical testing batteries is largely based on studies that have reported greater CMJ heights to be related to faster 5-, 10-, and 30-m sprint
Effect of Tethered Swimming as Postactivation Potentiation on Swimming Performance and Technical, Hemophysiological, and Psychophysiological Variables in Adolescent Swimmers
Zied Abbes, Monoem Haddad, Khalid W. Bibi, Iñigo Mujika, Cyril Martin, and Karim Chamari
responses compared with free swimming and improve the lactate production capacity of swimmers. 7 Hence, TS-induced PAP could be potentially an interesting method to enhance swimming sprint performance in training as well as in competition. 8 Therefore, the primary purpose of the present study was to
Kinetic and Kinematic Effects of Asymmetrical Loading of the Lower Limb During High-Speed Running
Katrin S. Acker, Tim V.M. Eberle, Dustin J. Oranchuk, Shelley N. Diewald, Aaron M. Uthoff, Chris Korfist, and John B. Cronin
Sprinting is an essential movement skill for many sports. 1 Accordingly, research has focused on training methods to improve sprint performance. 2 – 4 Wearable resistance (WR) is one such training method to receive recent attention. 5 WR involves microloading the athlete with light weights
Anthropometric and Power-Related Attributes Differ Between Competition Levels in Age-Matched Under-19-Year-Old Male Basketball Players
Markus N.C. Williams, Neal Wen, David B. Pyne, Davide Ferioli, Daniele Conte, Vincent J. Dalbo, and Aaron T. Scanlan
) possessed greater 20-m linear sprint speed, COD speed, upper limb ballistic power, and repeated-sprint capacity than age-matched players in a secondary U14 academy team (12.6 [1.0] y). Moreover, U14 players in the primary academy team were taller, had a wider wingspan, and greater fat-free mass than
The Relationship Between Isometric Strength and Sprint Acceleration in Sprinters
Claire J. Brady, Andrew J. Harrison, Eamonn P. Flanagan, G. Gregory Haff, and Thomas M. Comyns
Successful performance in sprint events requires rapid acceleration and a high maximum velocity. The starting-block phase and the subsequent acceleration phase are 2 important phases of sprint events, shown to directly generate results in a 60- and 100-m sprints. 1 During the acceleration phase
Hip Flexor and Knee Extensor Muscularity Are Associated With Sprint Performance in Sprint-Trained Preadolescent Boys
Nobuaki Tottori, Tadashi Suga, Yuto Miyake, Ryo Tsuchikane, Mitsuo Otsuka, Akinori Nagano, Satoshi Fujita, and Tadao Isaka
Superior sprint performance is achieved through the generation of large moments by the muscles crossing the hip, knee, and ankle joints ( 29 ). The magnitudes of these moments are primarily determined by agonist muscle size ( 2 , 11 , 12 , 20 , 32 ). In fact, trunk and lower limb muscles are larger
