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https://www.readbyqxmd.com/read/29709717/nonlinear-analysis-is-the-most-suitable-method-to-detect-changes-in-heart-autonomic-control-after-exercise-of-different-durations
#1
Rogério Figueiredo, Rafael Pereira, Osmar Pinto Neto
This study aimed to compare the heart autonomic control (HAC) response during two time-limited physical workouts using linear and nonlinear methods. A total of 20 healthy volunteers performed two physical workouts lasting 5 (P5) and 10 min (P10). In both workouts, volunteers performed as many repetitions as possible within the time limit of sets of 10 repetitions of four different exercises in the order of pull-ups, push-ups, barbell power clean, and barbell shoulder to overhead press. Barbell exercises were performed using a load of 50% of each volunteer's personal record for the jerk lift...
April 16, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29471195/gxnor-net-training-deep-neural-networks-with-ternary-weights-and-activations-without-full-precision-memory-under-a-unified-discretization-framework
#2
Lei Deng, Peng Jiao, Jing Pei, Zhenzhi Wu, Guoqi Li
Although deep neural networks (DNNs) are being a revolutionary power to open up the AI era, the notoriously huge hardware overhead has challenged their applications. Recently, several binary and ternary networks, in which the costly multiply-accumulate operations can be replaced by accumulations or even binary logic operations, make the on-chip training of DNNs quite promising. Therefore there is a pressing need to build an architecture that could subsume these networks under a unified framework that achieves both higher performance and less overhead...
April 2018: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/29166930/a-prospective-cohort-study-identifying-risk-factors-for-shoulder-injuries-in-adolescent-elite-handball-players-the-karolinska-handball-study-khast-study-protocol
#3
Martin Asker, Markus Waldén, Henrik Källberg, Lena W Holm, Eva Skillgate
BACKGROUND: Handball is a physical contact sport that includes frequent overhead throwing, and this combination leads to a high rate of shoulder injuries. Several factors have been associated with shoulder injuries in overhead athletes, but strong scientific evidence is lacking for most suggested risk factors. We therefore designed the Karolinska Handball Study (KHAST) with the aim to identify risk factors for shoulder injuries in adolescent male and female elite handball players studying at handball-profiled secondary schools in Sweden...
November 22, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28934100/differences-in-the-movement-skills-and-physical-qualities-of-elite-senior-academy-rugby-league-players
#4
Matthew R E Ireton, Kevin Till, Dan Weaving, Ben Jones
The aim of the present study was to investigate (a) the differences in the movement skills and physical qualities between academy and senior rugby league players, and (b) the relationships between movement skills and physical qualities. Fifty-five male rugby league players (Senior, n=18; Under 19 n=23; Under 16, n=14) undertook a physical testing battery including anthropometric (stature & body mass), strength (isometric mid-thigh pull; IMTP) and power (countermovement jump; CMJ) qualities, alongside the athletic ability assessment (AAA; comprised of overhead squat, double lunge, single-leg Romanian deadlift, press-up and pull-up exercises)...
June 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28859595/c6-spinous-process-fracture-in-a-young-adult
#5
Daniel J Watson, Jeffery A Dolbeer
A 21-year-old male military academy cadet developed acute posterior neck pain after performing multiple sets of overhead shoulder presses and resting the bar on his lower neck and shoulders. He presented to a direct-access physical therapy clinic. Due to the acute onset and focal nature of pain in the setting of repetitive weightlifting, the physical therapist ordered radiographs of the cervical spine, which revealed a C6 spinous process fracture. J Orthop Sports Phys Ther 2017;47(8):578. doi:10.2519/jospt...
September 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28832250/prevalence-and-correlates-of-resistance-training-skill-competence-in-adolescents
#6
Jordan J Smith, Matthew DeMarco, Sarah G Kennedy, Mark Kelson, Lisa M Barnett, Avery D Faigenbaum, David R Lubans
The aim of this study is to examine the prevalence and correlates of adolescents' resistance training (RT) skill competence. Participants were 548 adolescents (14.1 ± 0.5 years) from 16 schools in New South Wales, Australia. RT skills were assessed using the Resistance Training Skills Battery. Demographics, BMI, muscular fitness, perceived strength, RT self-efficacy, and motivation for RT were also assessed. The proportion demonstrating "competence" and "near competence" in each of the six RT skills were calculated and sex differences explored...
June 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28745472/effect-of-eight-weeks-of-upper-body-plyometric-training-during-the-competitive-season-on-professional-female-volleyball-players
#7
David Valades, José M Palao, Pedro Femia, Aurelio Ureña
BACKGROUND: The purpose of this study was to assess the effect of incorporating specific upper-body plyometric training for the spike into the competitive season of a women's professional volleyball team. METHODS: A professional team from the Spanish first division participated in the study. An A-B-A' quasi-experimental design with experimental and control groups was used. The independent variable was the upper-body plyometric training for eight weeks during the competitive season...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28699923/the-effects-of-moderate-versus-high-load-resistance-training-on-muscle-growth-body-composition-and-performance-in-collegiate-women
#8
Jason M Cholewa, Fabricio E Rossi, Christopher MacDonald, Amy Hewins, Samantha Gallo, Ashley Micenski, Layne Norton, Bill I Campbell
Twenty young women (20.3+1.5 years, 164+6 cm, 68.7+13.8 kg) without prior structured resistance training experience were recruited for this study. Body composition (BodPod), compartmental water (Bioelectrical Impedance), 7-site skinfold, and arm and thigh CSA were assessed pre- and post- 8 week training. Performance testing consisted of vertical jump, 3 kg chest pass initial velocity, squat 1RM and overhead press 1RM. Following 2 weeks of familiarization training, subjects were matched for body composition and relative squat strength, and randomly assigned to either a high- (HL: n=10; 4 sets of 5-7 repetitions) or moderate-load (ML: n=10; 2 sets of 10-14 repetitions) group that completed 6-7 exercises per day performed to momentary muscular failure...
June 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28129277/differences-in-muscle-activation-and-kinematics-between-cable-based-and-selectorized-weight-training
#9
Joseph F Signorile, Nicole K Rendos, Hector H Heredia Vargas, Taislaine C Alipio, Rebecca C Regis, Moataz M Eltoukhy, Renu S Nargund, Matthew A Romero
Signorile, JF, Rendos, NK, Heredia Vargas, HH, Alipio, TC, Regis, RC, Eltoukhy, MM, Nargund, RS, and Romero, MA. Differences in muscle activation and kinematics between cable-based and selectorized weight training. J Strength Cond Res 31(2): 313-322, 2017-Cable resistance training machines are showing resurgent popularity and allow greater number of degrees of freedom than typical selectorized equipment. Given that specific kinetic chains are used during distinct activities of daily living (ADL), cable machines may provide more effective interventions for some ADL, whereas others may be best addressed using selectorized equipment...
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27925640/diagnosis-and-management-of-distal-clavicle-osteolysis
#10
REVIEW
Steven F DeFroda, Christopher Nacca, Gregory R Waryasz, Brett D Owens
Distal clavicle osteolysis is an uncommon condition that most commonly affects weight lifters and other athletes who perform repetitive overhead activity. Although this condition most commonly presents in young active men, it is becoming increasing more common in women with the rise in popularity of body building and extreme athletics. Distal clavicle osteolysis can be debilitating, especially in those with rigorous training regimens, preventing exercise because of pain with activities such as bench presses and chest flies...
March 1, 2017: Orthopedics
https://www.readbyqxmd.com/read/27843418/effects-of-acute-carbohydrate-ingestion-on-anaerobic-exercise-performance
#11
RANDOMIZED CONTROLLED TRIAL
Ben M Krings, Jaden A Rountree, Matthew J McAllister, Patrick M Cummings, Timothy J Peterson, Brent J Fountain, JohnEric W Smith
BACKGROUND: Carbohydrate (CHO) supplementation during endurance exercises has been shown to increase performance, but there is limited research with CHO supplementation during strength and conditioning exercises. Therefore, the purpose of this study was to examine the effects of various levels of CHO ingestion during acute testing sessions requiring participants to complete a strength and conditioning program designed for collegiate athletes. METHODS: Participants (n = 7) performed a series of exercises while ingesting an amino-acid electrolyte control (CON) or CON plus varying levels of CHO...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27760844/injuries-in-an-extreme-conditioning-program
#12
Kyle T Aune, Joseph M Powers
BACKGROUND: Extreme conditioning programs (ECPs) are fitness training regimens relying on aerobic, plyometric, and resistance training exercises, often with high levels of intensity for a short duration of time. These programs have grown rapidly in popularity in recent years, but science describing the safety profile of these programs is lacking. HYPOTHESIS: The rate of injury in the extreme conditioning program is greater than the injury rate of weightlifting and the majority of injuries occur to the shoulder and back...
October 19, 2016: Sports Health
https://www.readbyqxmd.com/read/27390418/self-selected-intensity-ratings-of-perceived-exertion-and-affective-responses-in-sedentary-male-subjects-during-resistance-training
#13
Hassan Mohamed Elsangedy, Kleverton Krinski, Daniel Gomes da Silva Machado, Pedro Moraes Dutra Agrícola, Alexandre Hideki Okano, Sergio Gregório da Silva
[Purpose] This study examined the exercise intensity and psychophysiological responses to a self-selected resistance training session in sedentary male subjects. [Subjects and Methods] Twelve sedentary male subjects (35.8 ± 5.8 years; 25.5 ± 2.6 kg·m(2)) underwent four sessions at 48-h intervals: familiarization; two sessions of one repetition maximum test and a resistance training session in which they were told to self-select a load to complete 3 sets of 10 repetitions of chest press, leg press, seated rows, knee extension, overhead press, biceps curl, and triceps pushdown exercises...
June 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/26972269/the-kinetic-chain-revisited-new-concepts-on-throwing-mechanics-and-injury
#14
REVIEW
Samuel K Chu, Prakash Jayabalan, W Ben Kibler, Joel Press
The overhead throwing motion is a complex activity that is achieved through activation of the kinetic chain. The kinetic chain refers to the linkage of multiple segments of the body that allows for transfer of forces and motion. The lower extremities and core provide a base of support, generating energy that is transferred eventually through the throwing arm and hand, resulting in release of the ball. The kinetic chain requires optimal anatomy, physiology, and mechanics and is involved in all 6 phases of overhead throwing: windup, stride, arm cocking, acceleration, deceleration, and follow-through...
March 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/26904094/comparison-of-acceleration-techniques-for-selected-low-level-bioinformatics-operations
#15
Daniel Langenkämper, Tobias Jakobi, Dustin Feld, Lukas Jelonek, Alexander Goesmann, Tim W Nattkemper
Within the recent years clock rates of modern processors stagnated while the demand for computing power continued to grow. This applied particularly for the fields of life sciences and bioinformatics, where new technologies keep on creating rapidly growing piles of raw data with increasing speed. The number of cores per processor increased in an attempt to compensate for slight increments of clock rates. This technological shift demands changes in software development, especially in the field of high performance computing where parallelization techniques are gaining in importance due to the pressing issue of large sized datasets generated by e...
2016: Frontiers in Genetics
https://www.readbyqxmd.com/read/26761010/an-energy-efficient-skyline-query-for-massively-multidimensional-sensing-data
#16
Yan Wang, Wei Wei, Qingxu Deng, Wei Liu, Houbing Song
Cyber physical systems (CPS) sense the environment based on wireless sensor networks. The sensing data of such systems present the characteristics of massiveness and multi-dimensionality. As one of the major monitoring methods used in in safe production monitoring and disaster early-warning applications, skyline query algorithms are extensively adopted for multiple-objective decision analysis of these sensing data. With the expansion of network sizes, the amount of sensing data increases sharply. Then, how to improve the query efficiency of skyline query algorithms and reduce the transmission energy consumption become pressing and difficult to accomplish issues...
2016: Sensors
https://www.readbyqxmd.com/read/26637642/improving-shoulder-kinematics-in-individuals-with-paraplegia-comparison-across-circuit-resistance-training-exercises-and-modifications-in-hand-position
#17
COMPARATIVE STUDY
Linda M Riek, Joshua Tome, Paula M Ludewig, Deborah A Nawoczenski
BACKGROUND: Circuit resistance training (CRT) should promote favorable kinematics (scapular posterior tilt, upward rotation, glenohumeral or scapular external rotation) to protect the shoulder from mechanical impingement following paraplegia. Understanding kinematics during CRT may provide a biomechanical rationale for exercise positions and exercise selection promoting healthy shoulders. OBJECTIVE: The purposes of this study were: (1) to determine whether altering hand position during CRT favorably modifies glenohumeral and scapular kinematics and (2) to compare 3-dimensional glenohumeral and scapular kinematics during CRT exercises...
July 2016: Physical Therapy
https://www.readbyqxmd.com/read/26479022/strength-and-power-correlates-of-throwing-velocity-on-subelite-male-cricket-players
#18
Jonathan L Freeston, Thomas Carter, Gary Whitaker, Owen Nicholls, Kieron B Rooney
Throwing velocity is an important aspect of fielding in cricket to affect run-outs and reduce the opponent's run-scoring opportunities. Although a relationship between strength and/or power and throwing velocity has been well established in baseball, water polo, and European handball, it has not been adequately explored in cricket. Consequently, this study aimed to determine the relationship between measures of strength and/or power and throwing velocity in cricket players. Seventeen male cricket players (mean ± SD; age, 21...
2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26261428/do-physiological-measures-predict-selected-crossfit-%C3%A2-benchmark-performance
#19
Scotty J Butcher, Tyler J Neyedly, Karla J Horvey, Chad R Benko
PURPOSE: CrossFit(®) is a new but extremely popular method of exercise training and competition that involves constantly varied functional movements performed at high intensity. Despite the popularity of this training method, the physiological determinants of CrossFit performance have not yet been reported. The purpose of this study was to determine whether physiological and/or muscle strength measures could predict performance on three common CrossFit "Workouts of the Day" (WODs)...
2015: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/26117074/the-influence-of-cycle-time-on-shoulder-fatigue-responses-for-a-fixed-total-overhead-workload
#20
Clark R Dickerson, Kimberly A Meszaros, Alan C Cudlip, Jaclyn N Chopp-Hurley, Joseph E Langenderfer
The relationship between overhead work and musculoskeletal health depends on multiple task and individual factors. Knowledge gaps persist, despite examination of many of these factors individually and in combination. This investigation targeted task variation, as parameterized by cycle time within a fixed overall workload. Participants performed an intermittent overhead pressing task with four different cycle time conditions while overall workload and duty cycle was held constant. Several manifestations of fatigue were monitored during task performance...
August 20, 2015: Journal of Biomechanics
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