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Isoinertial training

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...
November 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
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
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
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
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
R De Azevedo Franke, C Ehlers Botton, R Rodrigues, R Silveira Pinto, C Silveira Lima
AIM: Although comparison between multi and single joint exercises has been conducted, there is insufficient evidence that these exercises could lead to different muscle activations. The aim of this study was to compare deltoid muscle activation during multi and single joint exercises. METHODS: Twelve male participants (23.4±1.6 years) with at least one year of strength training experience were assessed performing inclined lat pull-down, reverse peck deck and seated row exercises...
July 2015: Journal of Sports Medicine and Physical Fitness
F Pareja-Blanco, D Rodríguez-Rosell, L Sánchez-Medina, E M Gorostiaga, J J González-Badillo
This study aimed to compare the effect on neuromuscular performance of 2 isoinertial resistance training programs that differed only in actual repetition velocity: maximal intended (MaxV) vs. half-maximal (HalfV) concentric velocity. 21 resistance-trained young men were randomly assigned to a MaxV (n=10) or HalfV (n=11) group and trained for 6 weeks using the full squat exercise. A complementary study (n=8) described the acute metabolic and mechanical response to the protocols used. MaxV training resulted in a likely more beneficial effect than HalfV on squat performance: maximum strength (ES: 0...
October 2014: International Journal of Sports Medicine
Juan José González-Badillo, David Rodríguez-Rosell, Luis Sánchez-Medina, Esteban M Gorostiaga, Fernando Pareja-Blanco
The purpose of this study was to compare the effect on strength gains of two isoinertial resistance training (RT) programmes that only differed in actual concentric velocity: maximal (MaxV) vs. half-maximal (HalfV) velocity. Twenty participants were assigned to a MaxV (n = 9) or HalfV (n = 11) group and trained 3 times per week during 6 weeks using the bench press (BP). Repetition velocity was controlled using a linear velocity transducer. A complementary study (n = 10) aimed to analyse whether the acute metabolic (blood lactate and ammonia) and mechanical response (velocity loss) was different between the MaxV and HalfV protocols used...
2014: European Journal of Sport Science
Robert M Erskine, Gareth Fletcher, Jonathan P Folland
PURPOSE: Whilst skeletal muscle hypertrophy is considered an important adaptation to resistance training (RT), it has not previously been found to explain the inter-individual changes in strength after RT. This study investigated the contribution of hypertrophy to individual gains in isometric, isoinertial and explosive strength after 12 weeks of elbow flexor RT. METHODS: Thirty-three previously untrained, healthy men (18-30 years) completed an initial 3-week period of elbow flexor RT (to facilitate neurological responses) followed by 6-week no training, and then 12-week elbow flexor RT...
June 2014: European Journal of Applied Physiology
Jesús G Pallarés, Luis Sánchez-Medina, Carlos Esteban Pérez, Ernesto De La Cruz-Sánchez, Ricardo Mora-Rodriguez
This study analysed the effect of imposing a pause between the eccentric and concentric phases on the biological within-subject variation of velocity- and power-load isoinertial assessments. Seventeen resistance-trained athletes undertook a progressive loading test in the bench press (BP) and squat (SQ) exercises. Two trials at each load up to the one-repetition maximum (1RM) were performed using 2 techniques executed in random order: with (stop) and without (standard) a 2-s pause between the eccentric and concentric phases of each repetition...
2014: Journal of Sports Sciences
Lorena Torres-Ronda, Luis Sánchez-Medina, Juan J González-Badillo
Golf has become an increasingly popular sport and a growing body of research trying to identify its main physical requirements is being published. The aim of this review was twofold: first, to examine the existing scientific literature regarding strength training and golf in healthy, non-injured, subjects; and second, to reach conclusions that could provide information on how to design more effective strength training programs to improve golf performance as well as directions for future research. Studies which analyzed the relationship between muscle strength, swing performance variables (club head speed, driving distance, ball speed) and skill (handicap, score) were reviewed...
2011: Journal of Sports Science & Medicine
Arrigo Giombini, Andrea Macaluso, Luca Laudani, Annalisa Di Cesare, Alberto Piccinini, Fabio Pigozzi, Vincenzo Maria Saraceni
OBJECTIVE: The aim of this study was to identify the frequency of whole-body vibration (WBV) that elicits the greatest improvement in lower limb power output after an acute exposure in older women, with the hypothesis that an individualized optimal vibration frequency (OVF) would be more effective than a fixed vibration frequency. DESIGN: Maximal power output was measured during a double leg press on an isoinertial dynamometer in nine women with a mean (SD) age of 71 (3) yrs, 1 and 5 mins after WBV on a platform at three different frequencies, in a random order: 20 Hz, 50 Hz, and OVF, determined for each subject by identifying the frequency corresponding to the maximal electromyographic muscle response...
September 2013: American Journal of Physical Medicine & Rehabilitation
Juan J González-Badillo, Mário C Marques, Luis Sánchez-Medina
Configuration of the exercise stimulus in resitance training has been traditionally associated with a combination of the so-called 'acute resistance exercise variables' (exercise type and order, loading, number of repetitions and sets, rests duration and movement velocity). During typical resistance exercise in isoinertial conditions, and assuming every repetition is performed with maximal voluntary effort, velocity unintentionally declines as fatigue develops. However, few studies analyzing the response to different resitance training schemes have described changes in repetition velocity or power...
September 2011: Journal of Human Kinetics
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