potential to enhance sport performance such as forward acceleration, jumping, and agility tasks. 1 – 3 Stefanyshyn and colleagues 1 found an improvement in maximum-effort sprint performance when participants ran in shoes inserted with very stiff carbon plates at the soles compared with those without. It
Search Results
Segmented Forefoot Plate in Basketball Footwear: Does it Influence Performance and Foot Joint Kinematics and Kinetics?
Wing-Kai Lam, Winson Chiu-Chun Lee, Wei Min Lee, Christina Zong-Hao Ma, and Pui Wah Kong
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
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
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
Sprint Assessment Using Machine Learning and a Wearable Accelerometer
Reed D. Gurchiek, Hasthika S. Rupasinghe Arachchige Don, Lasanthi C. R. Pelawa Watagoda, Ryan S. McGinnis, Herman van Werkhoven, Alan R. Needle, Jeffrey M. McBride, and Alan T. Arnholt
Recent developments in field-based sprint assessments 1 – 5 enable athlete-specific force–velocity profiling allowing targeted training. 6 , 7 These employ a simple model describing a sprinter’s velocity ( v ) over time ( t ) as per the following equation 8 : d v d t = a m − v τ . (1) The model
The Inclusion of a Complementary Running Progression Program in the Rehabilitation of Acute Hamstring Injuries: A Critically Appraised Topic
Michelle A. Sandrey
, 12 this functional aspect needs to be addressed. Sprinting is a common mechanism of injury when the hamstrings work eccentrically in a stretched position. 1 , 11 , 12 Such movements can be seen during the terminal swing, specifically the late swing and early stance phase of running while sprinting
Individual Step Characteristics During Sprinting in Unilateral Transtibial Amputees
Hiroaki Hobara, Sakiko Saito, Satoru Hashizume, Hiroyuki Sakata, and Yoshiyuki Kobayashi
The average velocity of a 100-m sprint is the product of the average step frequency and average step length. Although both parameters are inversely correlated, an increase in 1 factor will result in an improvement in sprint velocity, provided the other factor does not undergo a proportionately
Electromyography Normalization Methods for High-Velocity Muscle Actions: Review and Recommendations
Nick Ball and Joanna Scurr
Electromyograms used to assess neuromuscular demand during high-velocity tasks require normalization to aid interpretation. This paper posits that, to date, methodological approaches to normalization have been ineffective and have limited the application of electromyography (EMG). There is minimal investigation seeking alternative normalization methods, which must be corrected to improve EMG application in sports. It is recognized that differing normalization methods will prevent cross-study comparisons. Users of EMG should aim to identify normalization methods that provide good reliability and a representative measure of muscle activation. The shortcomings of current normalization methods in high-velocity muscle actions assessment are evident. Advances in assessing alternate normalization methods have been done in cycling and sprinting. It is advised that when normalizing high-intensity muscle actions, isometric methods are used with caution and a dynamic alternative, where the muscle action is similar to that of the task is preferred. It is recognized that optimal normalization methods may be muscle and task dependent.
Achilles Tendon Length Is Not Related to 100-m Sprint Time in Sprinters
Daichi Tomita, Tadashi Suga, Hiromasa Ueno, Yuto Miyake, Takahiro Tanaka, Masafumi Terada, Mitsuo Otsuka, Akinori Nagano, and Tadao Isaka
Superior sprint performance is achieved using gross torques of the lower limb joints 1 potentially by increasing peak vertical ground reaction force. 2 , 3 The Achilles tendon (AT) plays an important role in storing and returning elastic energy during the stance phase of human locomotion
Ground Reaction Forces During Sprinting in Unilateral Transfemoral Amputees
Atsushi Makimoto, Yoko Sano, Satoru Hashizume, Akihiko Murai, Yoshiyuki Kobayashi, Hiroshi Takemura, and Hiroaki Hobara
Sprinters with lower extremity amputation wearing running-specific prostheses have improved their athletic performance in recent decades. In current Paralympic athletics regulation, sprinters with lower extremity amputation are classified in accordance with their amputation level, such as
