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https://www.readbyqxmd.com/read/29130570/cold-water-or-partial-body-cryotherapy-comparison-of-physiological-responses-and-recovery-following-muscle-damage
#1
Erich Hohenauer, Joseph T Costello, Rahel Stoop, Ursula M Küng, Peter Clarys, Tom Deliens, Ron Clijsen
The aim of this study was to compare i) the physiological responses following cold-water immersion (CWI) and partial-body cryotherapy (PBC) and ii) the effects on recovery following a muscle-damaging protocol (5 x 20 drop jumps). Nineteen healthy males were randomly allocated into either a CWI (10 °C for 10 min; n = 9) or a PBC (-60 °C for 30 sec, -135 °C for 2 min; n = 10) group. The physiological variables (thigh muscle oxygen saturation [SmO2 ], cutaneous vascular conductance [CVC], mean-arterial pressure [MAP] and local skin temperature) were assessed immediately prior and up to 60 min post-treatment (10 min intervals)...
November 11, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29123488/wearing-compression-tights-on-the-thigh-during-prolonged-running-attenuated-exercise-induced-increase-in-muscle-damage-marker-in-blood
#2
Sahiro Mizuno, Mari Arai, Fumihiko Todoko, Eri Yamada, Kazushige Goto
Purpose: To examine the effects of wearing a lower-body compression garment with different body coverage areas during prolonged running on exercise performance and muscle damage. Methods: Thirty male subjects were randomly assigned to one of three groups: (1) wearing a compression tights with 15 mmHg to thigh [n = 10, CT group], (2) wearing a compression socks with 15 mmHg to calf [n = 10, CS group], and (3) wearing a lower-body garment with < 5 mmHg to thigh and calf [n = 10, CON group]. The exercise consisted of 120 min of uphill running at 55% of [Formula: see text]O2max...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29121680/effects-of-drop-height-and-surface-instability-on-jump-performance-and-knee-kinematics
#3
Melanie Lesinski, Olaf Prieske, Rainer Beurskens, David Behm, Urs Granacher
The purpose of this study was to examine the combined effects of drop-height and surface condition on drop jump (DJ) performance and knee joint kinematics. DJ performance, sagittal and frontal plane knee joint kinematics were measured in jump experienced young male and female adults during DJs on stable, unstable and highly unstable surfaces using different drop-heights (20, 40, 60 cm). Findings revealed impaired DJ performance (Δ5-16%; p<0.05; 1.43≤d≤2.82), reduced knee valgus motion (Δ33-52%; p<0...
November 9, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29118716/etiology-and-recovery-of-neuromuscular-fatigue-following-competitive-soccer-match-play
#4
Callum G Brownstein, Jack P Dent, Paul Parker, Kirsty M Hicks, Glyn Howatson, Stuart Goodall, Kevin Thomas
Aim: Previous research into the etiology of neuromuscular fatigue following competitive soccer match-play has primarily focused on peripheral perturbations, with limited research assessing central nervous system function in the days post-match. The aim of the present study was to examine the contribution and time-course of recovery of central and peripheral factors toward neuromuscular fatigue following competitive soccer match-play. Methods: Sixteen male semi-professional soccer players completed a 90-min soccer match...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29117428/change-in-knee-flexor-torque-after-fatiguing-exercise-identifies-previous-hamstring-injury-in-football-players
#5
Cameron Lord, Fadi Ma'ayah, Anthony J Blazevich
PURPOSE: Muscular fatigue and inter-limb strength asymmetry are factors known to influence hamstring injury risk, however limb-specific exacerbation of knee flexor (hamstrings) torque production after fatiguing exercise has previously been ignored. To investigate changes in muscular force production before and after sport-specific (repeated-sprint) and non-specific (knee extension-flexion) fatiguing exercise, and explore the sensitivity and specificity of isokinetic endurance (i.e. muscle-specific) and single-leg vertical jump (i...
November 8, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29116831/clinician-friendly-physical-performance-tests-for-the-knee
#6
Jerrod J Harrison, Marissa K Yorgey, Alexander J Csiernik, Joseph H Vogler, Kenneth E Games
Reference:  Hegedus EJ, McDonough S, Bleakley C, Cook CE, Baxter GD. Clinician-friendly lower extremity physical performance measures in athletes: a systematic review of measurement properties and correlation with injury. Part 1: the tests for knee function including the hop tests. Br J Sports Med. 2015;49(10):642-648. CLINICAL QUESTION:   Do individual physical performance tests (PPTs) used as measures for lower extremity function have any relationship to injuries in athletes aged 12 years or older? DATA SOURCES:   Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were used to locate articles...
November 8, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29114563/risk-factors-for-lower-extremity-overuse-injuries-in-female-youth-soccer-players
#7
John W O'Kane, Moni Neradilek, Nayak Polissar, Lori Sabado, Allan Tencer, Melissa A Schiff
Background: Youth soccer injuries are common and of increasing concern, with sport specialization occurring at younger ages. Limited research is available regarding overuse injuries and risk factors in young female athletes. Purpose: To identify the number and rate of overuse injuries in female soccer players (ages 12-15 years), describe the anatomic location and type of injury, and evaluate contributing risk factors. Study Design: Case-control study; Level of evidence, 3...
October 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29107821/comparison-of-pre-contact-joint-kinematics-and-vertical-impulse-between-vertical-jump-landings-and-step-off-landings-from-equal-heights
#8
John R Harry, Julia Freedman Silvernail, John A Mercer, Janet S Dufek
Although impact phase differences between vertical jump landings (VJL) and step-off landings (STL) may be related to task-specific pre-contact strategies, pre-contact mechanics are rarely examined. Thus, pre-contact kinematics and vertical ground reaction force (vGRF) impulse were examined between VJL and STL. Ten health adults (20.9 ± 1.6 yrs; 167.8 ± 4.2 cm; 68.5 ± 7.15 kg) performed 15 VJL and 15 STL from equal heights. Limb (lead; trail) by task (VJL; STL) ANOVAs (α = 0.05) compared hip, knee, and ankle joint angles 150 ms pre-contact, 100 ms pre-contact, 50 ms pre-contact, and at ground contact...
November 3, 2017: Human Movement Science
https://www.readbyqxmd.com/read/29100827/sex-differences-in-neuromuscular-fatigability-in-response-to-load-carriage-in-the-field-in-british-army-recruits
#9
Thomas J O'Leary, Samantha C Saunders, Stephen J McGuire, Rachel M Izard
OBJECTIVES: Women are resistant to neuromuscular fatigue compared to men in response to a range of exercise tasks. The sex differences in the neuromuscular responses to load carriage have yet to be investigated. DESIGN: Prospective cohort study. METHODS: Twenty-three male and 19 female British Army recruits completed a 9.7km loaded march within 90min, with the weight carried dependent on military trade (16±2kg for men and 15±1kg for women)...
October 23, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29091512/knee-frontal-plane-projection-angle-a-comparison-study-between-drop-vertical-jump-and-step-down-tests-with-young-volleyball-athletes
#10
Gabriel Andrade Paz, Marianna de Freitas Maia, Haroldo Gualter Santana, Humberto Miranda, Vicente Lima, John D Willson
STUDY DESIGN: Observational study. CONTEXT: Altered frontal plane knee mechanics during dynamic tasks have been often associated with lower extremity injuries. Strategies to decrease these risk factors and improve knee joint stability are often applied in rehabilitation and training environments. OBJECTIVE: The purpose of this study was to compare knee joint frontal plane projection angles (FPPA) via two dimensional (2D) video analysis during drop vertical jump (DVJ) and step-down test (SDT) tasks in the preferred and non-preferred limbs of young male and female volleyball players...
November 1, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29083355/neuromuscular-recovery-in-acl-reconstruction-with-bone-tendon-patellar-bone-and-semitendinosus-gracilis-autograft
#11
Andrea Pasquini, Marco Jacopetti, Francesco Pogliacomi, Ileana Ramazzina, Cosimo Costantino
OBJECTIVE: Several different types of grafts have been used in ACL rupture. The purpose of the study was to compare the recovery of lower limbs muscle strength and proprioception in athletes, who underwent ACL reconstruction with Bone-Patellar-Tendon-Bone (BPTB) versus semitendinosus and gracilis (HS) autografts. METHODS: We enrolled 30 male amateur athletes. Each patient was evaluated by isokinetic test, triaxial accelerometer test and balance test with stabilometric platform...
October 18, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29083128/acute-neuromuscular-cognitive-and-physiological-responses-to-a-japanese-kickboxing-competition-in-semi-professional-fighters
#12
Giuseppe Cimadoro
BACKGROUND: Japanese kickboxing is a combat sport designed to accommodate fighters from different combat sports styles. However, the physiological profile of this discipline is unknown. Therefore, this study describes the neuromuscular, metabolic and cognitive responses to an official Japanese kickboxing (K-1) fight in 8 kickboxers. METHODS: Measurements before and after the competition involved a simple reaction time test (SRT), countermovement jump (CMJ), blood lactate (BLA) and rating of perceived exertion (RPE)...
October 27, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29073841/individuals-post-achilles-tendon-rupture-exhibit-asymmetrical-knee-and-ankle-kinetics-and-loading-rates-during-a-drop-countermovement-jump
#13
Hayley C Powell, Karin Grävare Silbernagel, Annelie Brorsson, Roy Tranberg, Richard W Willy
Study Design Cross sectional, laboratory study. Background Asymmetrical knee loading has been reported in individuals post-Achilles tendon rupture during jogging and hopping. Yet, no studies have examined knee loads in individuals post-Achilles tendon rupture during high demand tasks, such as single limb landings. Objectives We sought to determine if individuals post-Achilles tendon rupture demonstrated asymmetrical knee loads and impact forces during drop countermovement jumps (Drop CMJ). Methods Achilles tendon length and single leg heel rise test for endurance were assessed in 34 individuals (31 male) 6...
October 26, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29069548/evidence-of-homologous-and-heterologous-effects-after-unilateral-leg-training-in-youth
#14
Aymen Ben Othman, David G Behm, Anis Chaouachi
The positive effects of unilateral training on contralateral muscles (cross education) has been demonstrated with adults for over a century. There is limited evidence for cross education of heterologous muscles. Cross education has not been demonstrated with children. It was the objective of this study to investigate cross education training in children examining ipsilateral and contralateral homologous and heterologous muscles. Forty-eight male children (10-13 years) were assessed for unilateral, ipsilateral and contralateral lower limb strength, power and endurance (1 repetition maximum (RM) leg press, knee extensors (KE) and flexors (KF) maximum voluntary isometric contractions (MVIC), countermovement jump (CMJ), muscle endurance test (leg press repetitions with 60% 1RM)), and upper body unilateral MVIC elbow flexors (EF) and handgrip strength...
October 25, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29065622/effects-of-two-fatigue-protocols-on-impact-forces-and-lower-extremity-kinematics-during-drop-landings-implications-for-noncontact-anterior-cruciate-ligament-injury
#15
Rui Xia, Xini Zhang, Xi Wang, Xiaole Sun, Weijie Fu
The purpose of the study was to determine the effects of fatigue on the impact forces and sagittal plane kinematics of the lower extremities in a drop landing task. 15 male collegiate athletes were recruited. Five successful trials of a drop landing task were obtained during prefatigue and postfatigue in two fatigue protocols (constant speed running fatigue protocol [R-FP] and shuttle running + vertical jumping fatigue protocol [SV-FP]). Duration time, maximal heart rate, and RPE of each protocol were measured separately...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29065078/biomechanical-differences-of-multidirectional-jump-landings-among-female-basketball-and-soccer-players
#16
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
Taylor, JB, Ford, KR, Schmitz, RJ, Ross, SE, Ackerman, TA, and Shultz, SJ. Biomechanical differences of multidirectional jump landings among female basketball and soccer players. J Strength Cond Res 31(11): 3034-3045, 2017-Anterior cruciate ligament (ACL) injury prevention programs are less successful in basketball than soccer and may be due to distinct movement strategies that these athletes develop from sport-specific training. The purpose of this study was to identify biomechanical differences between female basketball and soccer players during multidirectional jump landings...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29059108/neuromuscular-electrical-stimulation-superimposed-on-movement-early-after-acl-surgery
#17
Luciana Labanca, Jacopo Emanuele Rocchi, Luca Laudani, Rita Guitaldi, Alessandro Virgulti, Pier Paolo Mariani, Andrea Macaluso
PURPOSE: Quadriceps weakness and asymmetrical loading of lower limbs are two major issues following anterior cruciate ligament reconstruction (ACLR). The aim of this study was to evaluate the effectiveness of a 6-week training protocol involving neuromuscular electrical stimulations (NMES) of the quadriceps muscle superimposed on repeated sit-to-stand-to-sit exercises (STSTS), as an additional treatment to standard rehabilitation, from the 15th to the 60th day following ACLR. METHODS: Sixty-three ACLR patients were randomly allocated to one of the three treatment groups: NMES superimposed on STSTS (NMES+STSTS), STSTS only, or no additional treatment (NAT) to standard rehabilitation...
October 20, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29037650/the-intra-rater-reliability-of-locating-and-measuring-the-severity-of-latent-trigger-points-in-the-quadriceps
#18
Richie Walsh, Sharon Kinsella, Johnson McEvoy
BACKGROUND: Trigger points (TrPs) in the lower-limb are under-investigated and may be a contributory factor in knee pathologies. OBJECTIVES: The purpose of this study was to establish the intra-rater reliability of assessing the location and severity of latent TrPs in the quadriceps. METHODS: Twenty-nine asymptomatic subjects were palpated for TrPs in the middle and quadriceps. The location and severity was then measured using the anatomical landmark system (ALS) and pain pressure threshold (PPT)...
October 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29037642/rebound-boots-change-lower-limb-muscle-activation-and-kinematics-during-different-fitness-exercises
#19
Mateus Rossato, Rodolfo André Dellagrana, Juliane Cristine Lopes Dos Santos, Felipe P Carpes, Rodrigo Ghedini Gheller, De Angelys de Ceselles Seixas da Silva, Ewertton de Souza Bezerra, João Otacílio Libardoni Dos Santos
The purpose of this study was to evaluate electromyography and kinematic parameters of the lower limbs using rebound boots (RB) and barefoot during a gym workout. This information can be helpful to practitioners to schedule rehabilitation and training programs. Ten women (25 ± 9 years) volunteered for the study; inclusion criteria were as follows: subjects must have experienced the use of RB and the analyzed exercises for at least 6 months, and have no previous injuries in the lower limbs. Seven exercises were performed for 30 s with the RB and subsequently barefoot...
October 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29035582/video-feedback-and-2-dimensional-landing-kinematics-in-elite-female-handball-players
#20
Anne Benjaminse, Wytze Postma, Ina Janssen, Egbert Otten
CONTEXT: In team handball, an anterior cruciate ligament injury often occurs during landing after a jump shot. Many intervention programs try to reduce the injury rate by instructing athletes to land more safely. Video is an effective way to provide feedback, but little is known about its influence on landing technique in sport-specific situations. OBJECTIVE: To test the effectiveness of a video-overlay feedback method on landing technique in elite handball players...
October 16, 2017: Journal of Athletic Training
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