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https://www.readbyqxmd.com/read/28344463/curcumin-and-piperine-supplementation-and-recovery-following-exercise-induced-muscle-damage-a-randomized-controlled-trial
#1
Barthélémy Delecroix, Abd Elbasset Abaïdia, Cédric Leduc, Brian Dawson, Grégory Dupont
The aim of this study was to analyze the effects of oral consumption of curcumin and piperine in combination on the recovery kinetics after exercise-induced muscle damage. Forty-eight hours before and following exercise-induced muscle damage, ten elite rugby players consumed curcumin and piperine (experimental condition) or placebo. A randomized cross-over design was performed. Concentric and isometric peak torque for the knee extensors, one leg 6 seconds sprint performance on a non-motorized treadmill, counter movement jump performance, blood creatine kinase concentration and muscle soreness were assessed immediately after exercise, then at 24h, 48h and 72h post-exercise...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28344461/within-session-sequence-of-balance-and-plyometric-exercises-does-not-affect-training-adaptations-with-youth-soccer-athletes
#2
Mehdi Chaouachi, Urs Granacher, Issam Makhlouf, Raouf Hammami, David G Behm, Anis Chaouachi
The integration of balance and plyometric training has been shown to provide significant improvements in sprint, jump, agility, and other performance measures in young athletes. It is not known if a specific within session balance and plyometric exercise sequence provides more effective training adaptations. The objective of the present study was to investigate the effects of using a sequence of alternating pairs of exercises versus a block (series) of all balance exercises followed by a block of plyometric exercises on components of physical fitness such as muscle strength, power, speed, agility, and balance...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28339350/the-effect-of-initial-knee-angle-on-concentric-only-squat-jump-performance
#3
Lachlan J Mitchell, Christos K Argus, Kristie-Lee Taylor, Jeremy M Sheppard, Dale W Chapman
PURPOSE: There is uncertainty as to which knee angle during a squat jump (SJ) produces maximal jump performance. Importantly, understanding this information will aid in determining appropriate ratios for assessment and monitoring of the explosive characteristics of athletes. METHOD: This study compared SJ performance across different knee angles-90º, 100º, 110º, 120º, 130º, and a self-selected depth-for jump height and other kinetic characteristics. For comparison between SJ and an unconstrained dynamic movement, participants also performed a countermovement jump from a self-selected depth...
March 24, 2017: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/28338388/preferred-hip-strategy-during-landing-reduces-knee-abduction-moment-in-collegiate-female-soccer-players
#4
Anh-Dung Nguyen, Jeffrey B Taylor, Taylor G Wimbish, Jennifer L Keith, Kevin R Ford
CONTEXT: Hip focused interventions are aimed to decrease frontal plane knee loading related to anterior cruciate ligament (ACL) injuries. Whether a preferred hip landing strategy decreases frontal plane knee loading is unknown. OBJECTIVE: To determine if a preferred hip landing strategy during a drop vertical jump (DVJ) is utilized during a single leg landing (SLL) task and whether differences in frontal plane knee loading are consistent between a DVJ and a SLL task...
March 24, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28338357/neuromuscular-fatigue-after-repeated-jumping-with-concomitant-electrical-stimulation
#5
Daria Neyroud, Jimmy Samararatne, Bengt Kayser, Nicolas Place
PURPOSE: We evaluated the etiology and extent of neuromuscular fatigue induced by fifty squat jumps performed with and without neuromuscular electrical stimulation (NMES) of the knee extensors. METHODS: Nine healthy recreationally active males (24 ± 2 years old) took part in two experiments. These consisted of fifty squat jumps performed with stimulation (NMES) or without (CON). Maximal voluntary contraction (MVC) force, maximal voluntary activation level (VAL) and forces evoked by single and double (10 and 100 Hz) stimulations were recorded before and after the fifty jumps...
March 24, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28298066/effect-of-fatigue-protocols-on-lower-limb-neuromuscular-function-and-implications-for-anterior-cruciate-ligament-injury-prevention-training
#6
Sue D Barber-Westin, Frank R Noyes
BACKGROUND: Approximately two-thirds of anterior cruciate ligament (ACL) tears are sustained during noncontact situations when an athlete is cutting, pivoting, decelerating, or landing from a jump. Some investigators have postulated that fatigue may result in deleterious alterations in lower limb biomechanics during these activities that could increase the risk of noncontact ACL injuries. However, prior studies have noted a wide variation in fatigue protocols, athletic tasks studied, and effects of fatigue on lower limb kinetics and kinematics...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28282794/kinesio-taping-does-not-alter-muscle-torque-muscle-activity-or-jumping-performance-in-professional-soccer-players-a-randomized-placebo-controlled-blind-clinical-trial
#7
Igor Phillip Dos Santos Glória, Tabajara de Oliveira Gonzalez, Tabajara de Oliveira Gonzalez, Ernesto Cesar Pinto Leal Junior, Cid André Fidelis de Paula Gomes, Carolina Marciela Herpich, Fernanda Colella Antonialli, Felipe Serenza, Lucas de Souza Calheira, Eric Edmur Camargo Arruda, Paulo Roberto Garcia Lucareli, Daniela Aparecida Biasotto-Gonzalez
INTRODUCTION: Kinesio taping consists of the attachment of a thin elastic tape over specific muscles, the thickness of which is similar to that of the epidermis. OBJECTIVE: The aim of the present study was to compare the effect of Kinesio taping and placebo taping on muscle torque, muscle activity and jumping performance soccer players. METHODS: Thirty athletes were randomly allocated to two groups (Group A: Kinesio taping and Group B: placebo taping)...
March 3, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28282755/the-acute-effects-of-an-intense-stretch-shortening-cycle-fatigue-protocol-on-the-neuromechanical-parameters-of-lower-limbs-in-men-and-prepubescent-boys
#8
Savvas Lazaridis, Dimitrios A Patikas, Eleni Bassa, Themistoklis Tsatalas, Konstantinos Hatzikotoulas, Christos Ftikas, Christos Kotzamanidis
The study examined the differences between boys and adults after an intense stretch-shortening cycle fatigue protocol on neuromechanical parameters of the lower limb. Thirteen boys (9-11 years old) and 13 adult men (22-28 years old) were tested for maximal isometric voluntary knee extension torque and drop jump (DJ) performance from 30 cm before and immediately after a fatigue protocol, consisted of 10 × 10 maximum effort vertical jumps. Three-dimensional kinematics, kinetics and electromyographic (EMG) parameters of the lower extremities muscles were recorded during DJs before and after the fatigue test...
February 8, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28275005/kinematic-control-of-extreme-jump-angles-in-the-red-leg-running-frog-kassina-maculata
#9
Christopher Thomas Richards, Laura Beatriz Porro, Amber Jade Collings
The kinematic flexibility of frog hindlimbs enables multiple locomotor modes within a single species. Prior work has extensively explored maximum performance capacity in frogs; however, the mechanisms by which anurans modulate performance within locomotor modes remain unclear. We explored how Kassina maculata, a species known for both running and jumping abilities, modulates takeoff angle from horizontal to nearly vertical. Specifically, how do 3D motions of leg segments coordinate to move the center of mass (COM) upwards and forwards? How do joint rotations modulate jump angle? High-speed video was used to quantify 3D joint angles and their respective rotation axis vectors...
March 8, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28275003/inverse-dynamic-modelling-of-jumping-in-the-red-legged-running-frog-kassina-maculata
#10
Laura B Porro, Amber J Collings, Enrico A Eberhard, Kyle P Chadwick, Christopher T Richards
Although the red-legged running frog Kassina maculata is secondarily a walker/runner, it retains the capacity for multiple locomotor modes, including jumping at a wide range of angles (nearly 70°). Using simultaneous hind limb kinematics and single-foot ground reaction forces, we performed inverse dynamics analyses to calculate moment arms and torques about the hind limb joints during jumping at different angles in K. maculata. We show that forward thrust is generated primarily at the hip and ankle, while body elevation is primarily driven by the ankle...
March 8, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28251066/titanium-elastic-nailing-in-diaphyseal-femoral-fractures-of-children-below-six-years-of-age
#11
Fabrizio Donati, Giuseppe Mazzitelli, Marco Lillo, Amerigo Menghi, Carla Conti, Antonio Valassina, Emanuele Marzetti, Giulio Maccauro
AIM: To report the clinical and radiographic results of titanium elastic nail (TEN) in diaphyseal femoral fractures of children below age of six years. METHODS: A retrospective analysis of 27 diaphyseal femoral fractures in children younger than six years treated with TEN between 2005 and 2015 was conducted. Patients were immobilized in a cast for 5 wk and the nails were removed from 6 to 12 wk after surgery. Twenty-four cases were clinically and radiographically re-evaluated using the Flynn's scoring criteria, focusing on: Limb length discrepancy, rotational deformity, angulation, hip and knee range of motion (ROM), functional status, complications, and parent's satisfaction...
February 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28244026/-injuries-on-vaulting
#12
Christoph Raschka, Laura Feuerbach
OBJECTIVE AND METHOD: Using an online questionnaire, the injuries of 649 acrobats on horseback were recorded (636 female, 13 male, average age 20.8 years, average sports time 12.1 years). 64% of the athletes practised their sport in the upper and 34% in the lower performance classes. RESULTS: 62.7% of the athletes hurt themselves on vaulting at least once during their sports time. Most injuries occured at the lower limbs (57.5%), particularly on foot (31.2%) and knee (22...
March 2017: MMW Fortschritte der Medizin
https://www.readbyqxmd.com/read/28240710/intermittent-but-not-continuous-static-stretching-improves-subsequent-vertical-jump-performance-in-flexibility-trained-athletes
#13
Gregory C Bogdanis, Olyvia Donti, Charilaos Tsolakis, Ilias Smilios, David J Bishop
This study examined changes in countermovement jump (CMJ) height after an intermittent or a continuous static stretching protocol of equal total duration. DESIGN: Sixteen male, elite-level gymnasts performed 90 s of intermittent (3 x 30 s with 30 s rest) or continuous stretching (90 s) of the quadriceps muscle. A single-leg stretching and jumping design was used, with the contra-lateral limb serving as a control. The same individuals performed both conditions with alternate legs in a randomized, counterbalanced order...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28229573/associations-between-functional-movement-screen-scores-and-performance-variables-in-surf-athletes
#14
Bruno A Ferreira da Silva, Filipe M Clemente, Fernando M Lourenço Martins
BACKGRAUND: Functional Movement Screen (FMS) have been used to assess the movement patterns in daily sports practice. Some associations between FMS scores and physical variables have been found in some sports. Nevertheless, no study was conducted in surf. METHODS: Eighteen surf athletes (11 male) participated in the study (18.3 ± 6.3 y; 60.0 ± 9.6 kg; 168.6 ± 8.1 cm). All participants completed anthropometrics, Knee to Wall test, Functional Movement Screen, Isometric Knee Extension, Handgrip, Squat and Countermovement Jump...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28222578/the-effects-of-prevent-injury-and-enhance-performance-program-in-a-female-soccer-team
#15
Cristina Rodríguez, Soledad Echegoyen, Takeshi Aoyama
BACKGROUND: The purpose of this study is to evaluate the changes of muscle strength in lower limbs and knee valgus alignment using the Prevent Injury and Enhance Performance Program (PEP program) to prevent ACL injuries in female soccer players during an entire season. METHODS: A longitudinal and prospective study was done in twenty female soccer players at the Universidad Nacional Autónoma de México, from a senior team. During 24 weeks the training program was applied three times a week as a part of the team workouts...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28203593/effects-of-sex-and-fatigue-on-biomechanical-measures-during-the-drop-jump-task-in-children
#16
Kristín Briem, Kolbrún Vala Jónsdóttir, Árni Árnason, Þórarinn Sveinsson
BACKGROUND: Female athletes have a higher rate of anterior cruciate ligament (ACL) injury than males from adolescence and into maturity, which is suggested to result from sex-specific changes in dynamic movement patterns with maturation. Few studies have studied movement strategies and response to fatigue in children. PURPOSE: To evaluate the effect of fatigue on biomechanical variables associated with increased risk for ACL injury during a drop-jump (DJ) performance in children...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28195972/individual-and-combined-influence-of-ace-and-actn3-genes-on-muscle-phenotypes-in-polish-athletes
#17
Joanna Orysiak, Joanna Mazur-Różycka, Krzysztof Busko, Jan Gajewski, Beata Szczepanska, Jadwiga Malczewska-Lenczowska
The aim of this study was to examine the association between ACE and ACTN3 genes, independently or in combination, and muscle strength and power in male and female athletes. The study involved 398 young male (n=266) and female (n=132) athletes representing various sport disciplines (ice hockey, canoeing, swimming, volleyball). All were Caucasians. The following measurements were taken: height of jump and mechanical power in countermovement jump (CMJ) and spike jump (SPJ), and muscle strength of 10 muscle groups (flexors and extensors of the elbow, shoulder, hip, knee and trunk)...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28182531/relationships-of-functional-tests-following-acl-reconstruction-exploratory-factor-analyses-of-the-lower-extremity-assessment-protocol
#18
Melissa DiFabio, Lindsay V Slater, Grant Norte, John Goetschius, Joseph M Hart, Jay Hertel
CONTEXT: After ACL reconstruction (ACLR), deficits are often assessed using a variety of functional tests, which can be time consuming. It is unknown whether these tests provide redundant or unique information. OBJECTIVE: To explore relationships between components of a battery of functional tests, the Lower Extremity Assessment Protocol (LEAP), to aid in developing the most informative, concise battery of tests for evaluating ACLR patients. DESIGN: Descriptive, cross-sectional...
February 9, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28181833/influence-of-a-full-body-compression-suit-on-trunk-positioning-and-knee-joint-mechanics-during-lateral-movements
#19
Guillaume Mornieux, Elmar Weltin, Monika Pauls, Franz Rott, Albert Gollhofer
Trunk positioning has been shown to be associated with knee joint loading during athletic tasks, especially changes of direction. The purpose of the present study was to test whether a full body compression suit (FBCS) would improve trunk positioning and knee joint control during lateral movements. Twelve female athletes performed lateral reactive jumps (LRJ) and unanticipated cuttings with and without the customized FBCS, while 3D kinematics and kinetics were measured. FBCS did not influence trunk positioning during LRJ and led to increased trunk lateral lean during cuttings (P < ...
February 9, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28177751/evidence-of-nonlocal-muscle-fatigue-in-male-youth
#20
Aymen Ben Othman, Anis Chaouachi, Raouf Hammami, Mehdi M Chaouachi, Sofien Kasmi, David G Behm
Evidence for nonlocal muscle fatigue (NLMF) has been inconsistent in adults, with no studies investigating youth. The objective was to examine NLMF in youth. Forty-two young males (age, 10-13 years) were tested for maximal voluntary isometric contraction (MVIC) force of the ipsilateral and contralateral knee extensors at 90° and 120° knee flexion, elbow flexors at 90°, handgrip, knee extensor isokinetic torque (300°·s(-1) analyzed at 90° and 120° knee flexion), as well as a unilateral countermovement jump (CMJ) and Y Balance test (YBT)...
March 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
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