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James Peter Fisher, Luke Carlson, James Steele
Research has produced equivocal results with regard to eccentric (ECC) only compared with traditional concentric/eccentric resistance training (RT). When considered in relation to load- and repetition duration-accentuated (ECC) training as well as the use of isokinetic and isoinertial training methods, there is a relative dearth of literature considering multi-joint, multi-exercise RT interventions. The present study considered 59 male and female participants randomly divided in to 3 sex counterbalanced groups; ECC only (ECC, n = 20), repetition duration-accentuated ECC (ECC-A, n = 20), and traditional (CON, n = 19) performing full-body, effort matched RT programmes for 2 days·week(-1) for 10 weeks...
June 22, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Saied Jalal Aboodarda, Phillip A Page, David George Behm
BACKGROUND: Elastic resistance has been commonly used in the therapeutic and fitness setting; however, the ability of elastic resistance to overload and activate muscles has been questioned because of linear increase in elastic resistance as the device is elongated. The purpose of this meta-analysis was to examine the available literature on muscle activation associated with isoinertial and elastic resistance exercises, and to provide a quantitative summary comparing the two resistance training modes...
September 20, 2016: Clinical Biomechanics
Jacob E Earp, Robert U Newton, Prue Cormie, Anthony J Blazevich
INTRODUCTION: Tendon dynamics influence movement performance and provide the stimulus for long-term tendon adaptation. As tendon strain increases with load magnitude and decreases with loading rate, changes in movement speed during exercise should influence tendon strain. METHODS: Ten resistance-trained men [squat one repetition maximum (1RM) to body mass ratio: 1.65 ± 0.12] performed parallel-depth back squat lifts with 60% of 1RM load at three different speeds: slow fixed-tempo (TS: 2-s eccentric, 1-s pause, 2-s concentric), volitional-speed without a pause (VS) and maximum-speed jump (JS)...
2016: Frontiers in Physiology
Cindy A McGeary, Donald D McGeary, Jose Moreno, Robert J Gatchel
Chronic musculoskeletal pain, such as low back pain, often appears in the presence of psychiatric comorbidities (e.g., depression, posttraumatic stress disorder (PTSD)), especially among U.S. military service members serving in the post-9/11 combat era. Although there has been much speculation about how to best address pain/trauma psychiatric symptom comorbidities, there are little available data to guide practice. The present study sought to examine how pre-treatment depression and PTSD influence outcomes in a functional restoration pain management program using secondary analysis of data from the Department of Defense-funded Functional and Orthopedic Rehabilitation Treatment (FORT) trial...
2016: Healthcare (Basel, Switzerland)
Kristine Gandia, Melanie Potiaumpai, Joesph F Signorile
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Caitlin Lowe, Christopher Bailey, Joseph F Signorile
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Simon Avrillon, Boris Jidovtseff, François Hug, Gaël Guilhem
PURPOSE: Muscle strengthening is commonly based on the use of isoinertial loading, whereas variable resistances such as pneumatic loading may be implemented to optimize training stimulus. The purpose of the present study was to determine the effect of the ratio between pneumatic and isoinertial resistance on the force-velocity relationship during ballistic movements. METHODS: A total of 15 participants performed two concentric repetitions of ballistic bench press movements with intention to throw the bar at 30%, 45%, 60%, 75%, and 90% of the maximal concentric repetition, with five resistance ratios including 100%, 75%, 50%, 25% or 0% of pneumatic resistance, the additional load being isoinertial...
June 27, 2016: International Journal of Sports Physiology and Performance
Ali Yavuz Karahan, Nilay Sahin, Akın Baskent
BACKGROUND: Failed back surgery syndrome (FBSS) is a condition characterized by persistent pain following back surgeries. OBJECTIVE: To determine the effects of different exercises programs in FBSS. METHODS: A Single-blind, randomized, controlled trial designed. One hundred participants with failed back surgery syndrome were randomly assigned to three different exercises groups (Isokinetic, Dynamic lumbar stabilization (DLS), and home exercises (HE) groups) and a control group...
June 17, 2016: Journal of Back and Musculoskeletal Rehabilitation
Simon Walker, Anthony J Blazevich, G Gregory Haff, James J Tufano, Robert U Newton, Keijo Häkkinen
As training experience increases it becomes more challenging to induce further neuromuscular adaptation. Consequently, strength trainers seek alternative training methods in order to further increase strength and muscle mass. One method is to utilize accentuated eccentric loading, which applies a greater external load during the eccentric phase of the lift as compared to the concentric phase. Based upon this practice, the purpose of this study was to determine the effects of 10 weeks of accentuated eccentric loading vs...
2016: Frontiers in Physiology
Pietro Picerno, Valerio Viero, Marco Donati, Tamara Triossi, Virginia Tancredi, Giovanni Melchiorri
The aim of the present article was to assess the reliability of strength curves as determined from tridimensional linear accelerations and angular velocities measured by a single inertial measurement unit (IMU) fixed on the upper arm during a shoulder abduction movement performed holding a 1 kg dumbbell in the hand. Within-subject repeatability of the task was assessed on 45 subjects performing four trials consisting of one maximal shoulder abduction-adduction movement. Intraclass correlation coefficient (ICC) was computed on the average movement angular velocity (VEL) and range of movement (ROM) across the four trials...
2015: Journal of Rehabilitation Research and Development
Paolo Bruseghini, Elisa Calabria, Enrico Tam, Chiara Milanese, Eugenio Oliboni, Andrea Pezzato, Silvia Pogliaghi, Gian Luca Salvagno, Federico Schena, Roberto Pozzi Mucelli, Carlo Capelli
We investigated the effect of 8 weeks of high intensity interval training (HIT) and isoinertial resistance training (IRT) on cardiovascular fitness, muscle mass-strength and risk factors of metabolic syndrome in 12 healthy older adults (68 yy ± 4). HIT consisted in 7 two-minute repetitions at 80%-90% of V˙O2max, 3 times/w. After 4 months of recovery, subjects were treated with IRT, which included 4 sets of 7 maximal, bilateral knee extensions/flexions 3 times/w on a leg-press flywheel ergometer. HIT elicited significant: i) modifications of selected anthropometrical features; ii) improvements of cardiovascular fitness and; iii) decrease of systolic pressure...
July 10, 2015: Oncotarget
Timothy P Wyland, Joshua D Van Dorin, G Francis Cisco Reyes
Applying accommodating resistance combined with isoinertial resistance has been demonstrated to be effective in improving neuromuscular attributes important for sport performance. The main purpose of this study was to determine whether short sprints can be acutely enhanced after several sets of back squats with or without accommodating resistance. Twenty recreationally resistance-trained males (age: 23.3 ± 4.4 years; height: 178.9 ± 6.5 cm; weight: 88.3 ± 10.8 kg) performed pre-post testing on 9.1-m sprint time...
November 2015: Journal of Strength and Conditioning Research
César M P Meylan, John B Cronin, Jon L Oliver, Michael M G Hughes, Boris Jidovtseff, Shane Pinder
The purpose of this study was to quantify the inter-session reliability of force-velocity-power profiling and estimated maximal strength in youth. Thirty-six males (11-15 years old) performed a ballistic supine leg press test at five randomized loads (80%, 100%, 120%, 140%, and 160% body mass) on three separate occasions. Peak and mean force, power, velocity, and peak displacement were collected with a linear position transducer attached to the weight stack. Mean values at each load were used to calculate different regression lines and estimate maximal strength, force, velocity, and power...
March 2015: Sports Biomechanics
Nicholas J Napoli, Anthony R Mixco, Jorge E Bohorquez, Joseph F Signorile
High-speed resistance training is used to increase power; however, momentum can reduce the effectiveness of high-speed (HS) training when using weight-stack (WS) machines. This study used a non-linear scaled wavelet analysis to assess differences between pneumatic (P) and WS during seven HS or controlled speed (CS) repetitions. Vastus medialis (VM) and lateralis (VL), and rectus femoris (RF) EMG data were collected during leg extension exercises performed by five regular weight-trainers (mean age ± SD, 23...
April 2015: Human Movement Science
Juan J González-Badillo, Fernando Pareja-Blanco, David Rodríguez-Rosell, José L Abad-Herencia, Juan J Del Ojo-López, Luis Sánchez-Medina
This study aimed to analyze the effect of velocity-based resistance training (RT) with moderate loads and few repetitions per set combined with jumps and sprints on physical performance in young soccer players of different ages. A total of 44 elite youth soccer players belonging to 3 teams participated in this study: an under-16 team (U16, n = 17) and an under-18 team (U18, n = 16) performed maximal velocity RT program for 26 weeks in addition to typical soccer training, whereas an under-21 team (U21, n = 11) did not perform RT...
May 2015: Journal of Strength and Conditioning Research
Caleb D Bazyler, George K Beckham, Kimitake Sato
The isometric squat has been used to detect changes in kinetic variables as a result of training; however, controversy exists in its application to dynamic multijoint tasks. Thus, the purpose of this study was to further examine the relationship between isometric squat kinetic variables and isoinertial strength measures. Subjects (17 men, 1-repetition maximum [1RM]: 148.2 ± 23.4 kg) performed squats 2 d · wk(-1) for 12 weeks and were tested on 1RM squat, 1RM partial squat, and isometric squat at 90° and 120° of knee flexion...
May 2015: Journal of Strength and Conditioning Research
Ferran Abat, Wayne-J Diesel, Pablo-E Gelber, Fernando Polidori, Joan-Carles Monllau, Jose-Manuel Sanchez-Ibañez
AIM: to show the effect of Intratissue Percutaneous Electrolysis (EPI®) combined with eccentric programme in the treatment of patellar tendinopathy. METHODS: prospective study of 33 athlete-patients consecutively treated for insertional tendinopathy with Intratissue Percutaneous Electrolysis (EPI®) and followed for 2 years. Functional assessment was performed at the first visit, at three months and two years with the Tegner scale and VISA-P. RESULTS: an average improvement in the VISA-P of 35 points was obtained...
April 2014: Muscles, Ligaments and Tendons Journal
Lisa Fore, Yoheli Perez, Randy Neblett, Sali Asih, Tom G Mayer, Robert J Gatchel
OBJECTIVE: To evaluate whether functional capacity evaluation (FCE) scores are responsive to functional restoration treatment, and to assess the ability of FCEs at program discharge to predict work outcomes. DESIGN: An interdisciplinary cohort study of prospectively collected data. SETTING: A functional restoration center. PATIENTS: A consecutive sample of 354 patients with chronic disabling occupational musculoskeletal disorders (CDOMDs) completed a functional restoration program consisting of quantitatively directed exercise progression and multi-modal disability management with interdisciplinary medical supervision...
April 2015: PM & R: the Journal of Injury, Function, and Rehabilitation
M López-Segovia, F Pareja-Blanco, P Jiménez-Reyes, J J González-Badillo
The aim of this study was to investigate the relationships between repeated explosive effort sequences (20+20 m shuttle sprint with change of direction, kicking and jumping), metabolic response (lactate and ammonia), and fitness qualities (strength and endurance) in under-19 soccer players. 21 players completed: 1) sprint test: 30 m (T30) and 40 m (20+20 m) shuttle sprints; 2) countermovement jumps (CMJ); 3) maximal kicking; and 4) 9 repeated-explosive effort sequences (RES); 4) a progressive isoinertial loading test in full squat to determine the load which subjects achieved ~1 m · s(-1) (V1-load); 6) Yo-Yo Intermittent Recovery Test Level 1 (YYIRT-1)...
February 2015: International Journal of Sports Medicine
M Buckthorpe, R M Erskine, G Fletcher, J P Folland
This study aimed to delineate the contribution of adaptations in agonist, antagonist, and stabilizer muscle activation to changes in isometric and isoinertial lifting strength after short-term isoinertial resistance training (RT). Following familiarization, 45 men (23.2 ± 2.8 years) performed maximal isometric and isoinertial strength tests of the elbow flexors of their dominant arms before and after 3 weeks of isoinertial RT. During these tasks, surface electromyography (EMG) amplitude was recorded from the agonist (biceps brachii short and long heads), antagonist (triceps brachii lateral head), and stabilizer (anterior deltoid, pectoralis major) muscles and normalized to either Mmax (agonists) or to maximum EMG during relevant reference tasks (antagonist, stabilizers)...
October 2015: Scandinavian Journal of Medicine & Science in Sports
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