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https://www.readbyqxmd.com/read/28737611/can-resistance-training-enhance-the-rapid-force-development-in-unloaded-dynamic-isoinertial-multi-joint-movements-a-systematic-review
#1
Bas Van Hooren, Frans Bosch, Kenneth Meijer
Van Hooren, B, Bosch, F, and Meijer, K. Can resistance training enhance the rapid force development in unloaded dynamic isoinertial multi-joint movements? A systematic review. J Strength Cond Res 31(8): 2324-2337, 2017-The objectives of this systematic review were to (a) evaluate whether resistance training can improve the rapid force development in unloaded dynamic isoinertial multi-joint movements and (b) investigate whether these effects differ between untrained/recreationally trained and well-trained individuals...
August 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538317/effects-of-inertial-setting-on-power-force-work-and-eccentric-overload-during-flywheel-resistance-exercise-in-women-and-men
#2
Luis M Martinez-Aranda, Rodrigo Fernandez-Gonzalo
Exercise load is a key component in determining end-point adaptations to resistance exercise. Yet, there is no information regarding the use of different inertia (i.e., loads) during isoinertial flywheel resistance exercise, a very popular high-intensity training model. Thus, this study examined power, work, force, and eccentric overload produced during flywheel resistance exercise with different inertial settings in men and women. Twenty-two women (n = 11) and men (n = 11) performed unilateral (in both legs) isolated concentric (CON) and coupled CON and eccentric (ECC) exercise in a flywheel knee extension device employing 6 inertias (0...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28400506/acute-elevations-in-serum-hormones-are-attenuated-after-chronic-training-with-traditional-isoinertial-but-not-accentuated-eccentric-loads-in-strength-trained-men
#3
Simon Walker, Keijo Häkkinen, Guy Gregory Haff, Anthony J Blazevich, Robert U Newton
It has been proposed that the maintenance of acute hormonal responses reveal an efficacy of a training stimulus to evoke ongoing increases in strength and muscle mass. We previously observed that maximum strength continued to improve throughout a 10-week period in an accentuated eccentric loading group (AEL) but not a traditional isoinertial loading (ISO) group. Therefore, this study investigated whether the magnitude of acute hormonal responses was greater (i.e., maintained) in AEL compared to ISO at the end of the training period...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28298168/comparison-of-two-methodological-approaches-for-the-mechanical-analysis-of-single-joint-isoinertial-movement-using-a-customised-isokinetic-dynamometer
#4
Mathieu Plautard, Gaël Guilhem, Vincent Fohanno, Antoine Nordez, Christophe Cornu, Arnaud Guével
Compared to isokinetic and isometric tests, isoinertial movements have been poorly used to assess single-joint performance. Two calculation procedures were developed to estimate mechanical performance during single-joint isoinertial movements performed on a customised isokinetic dynamometer. The results were also compared to appreciate the effects of measurement systems and calculation procedures. Five participants performed maximal knee extensions at four levels of resistance (30, 50, 70 and 90% of the one-repetition maximum, 1-RM)...
March 16, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28044199/muscle-fascicle-shortening-behaviour-of-vastus-lateralis-during-a-maximal-force-velocity-test
#5
Hugo Hauraix, Sylvain Dorel, Giuseppe Rabita, Gaël Guilhem, Antoine Nordez
PURPOSE: Muscle fascicles-tendon interactions are the main determinant in production of high joint velocity. Currently, no study has investigated the muscle fascicles behaviour of knee extensor muscles until the highest reachable velocity (e.g., unloaded knee extension). We aimed to track the changes in vastus lateralis fascicles length during knee extensions to quantify muscle fascicles and tendinous tissues contributions to muscle-tendon unit shortening and to determine maximal muscle fascicles shortening velocity...
February 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28031763/evolution-of-determinant-factors-of-repeated-sprint-ability
#6
Fernando Pareja-Blanco, Luis Suarez-Arrones, David Rodríguez-Rosell, Manuel López-Segovia, Pedro Jiménez-Reyes, Beatriz Bachero-Mena, Juan José González-Badillo
The aim of this study was to investigate the changes in the relationships between repeated sprint ability (RSA) and anthropometric measures as well as fitness qualities in soccer players. Twenty-one professional soccer players performed several anthropometric and physical tests including countermovement vertical jumps (CMJs), a straight-line 30 m sprint (T30), an RSA test (6 x 20 + 20 m with 20 s recovery), a progressive isoinertial loading test in a full squat, a Yo-Yo Intermittent Recovery Test Level-1 (YYIRT-1) and a 20 m shuttle run test (20mSRT)...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/27690566/the-effects-of-muscle-action-repetition-duration-and-loading-strategies-of-a-whole-body-progressive-resistance-training-programme-on-muscular-performance-and-body-composition-in-trained-males-and-females
#7
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
https://www.readbyqxmd.com/read/27681867/muscle-activation-comparisons-between-elastic-and-isoinertial-resistance-a-meta-analysis
#8
REVIEW
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...
November 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27630574/faster-movement-speed-results-in-greater-tendon-strain-during-the-loaded-squat-exercise
#9
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
https://www.readbyqxmd.com/read/27417626/military-chronic-musculoskeletal-pain-and-psychiatric-comorbidity-is-better-pain-management-the-answer
#10
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...
June 30, 2016: Healthcare (Basel, Switzerland)
https://www.readbyqxmd.com/read/27359432/optimal-loading-for-isoinertial-power-in-older-individuals-177-board-14-june-1-9-30-am-11-00-am
#11
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
https://www.readbyqxmd.com/read/27359423/a-pneumatic-isoinertial-test-for-assessing-power-endurance-in-older-persons-168-board-5-june-1-9-30-am-11-00-am
#12
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
https://www.readbyqxmd.com/read/27347664/influence-of-isoinertial-pneumatic-mixed-resistances-on-force-velocity-relationship
#13
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...
August 24, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27341641/comparison-of-effectiveness-of-different-exercise-programs-in-treatment-of-failed-back-surgery-syndrome-a-randomized-controlled-trial
#14
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
https://www.readbyqxmd.com/read/27199764/greater-strength-gains-after-training-with-accentuated-eccentric-than-traditional-isoinertial-loads-in-already-strength-trained-men
#15
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
https://www.readbyqxmd.com/read/26230401/ambulatory-assessment-of-shoulder-abduction-strength-curve-using-a-single-wearable-inertial-sensor
#16
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
https://www.readbyqxmd.com/read/26046575/effects-of-eight-weeks-of-aerobic-interval-training-and-of-isoinertial-resistance-training-on-risk-factors-of-cardiometabolic-diseases-and-exercise-capacity-in-healthy-elderly-subjects
#17
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
https://www.readbyqxmd.com/read/25968229/postactivation-potentation-effects-from-accommodating-resistance-combined-with-heavy-back-squats-on-short-sprint-performance
#18
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
https://www.readbyqxmd.com/read/25600132/the-reliability-of-isoinertial-force-velocity-power-profiling-and-maximal-strength-assessment-in-youth
#19
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
https://www.readbyqxmd.com/read/25553560/an-emg-comparative-analysis-of-quadriceps-during-isoinertial-strength-training-using-nonlinear-scaled-wavelets
#20
COMPARATIVE STUDY
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
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