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Brian C Clark, Todd M Manini
In recent years, there has been increasing interest in using low-load resistance exercise in combination with a reduction in blood flow to promote muscle adaptation (ie, blood flow-restricted exercise or KAATSU exercise). There has been 1 case study reported in the literature of this type of exercise resulting in exertional rhabdomyolysis, and herein, we report the second case of exertional rhabdomyolysis. In this case, a 20-year-old man performed 6 sets of blood flow-restricted exercise (3 sets of knee-extension and 3 sets of elbow-flexion exercise)...
February 5, 2016: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
Scott J Dankel, Matthew B Jessee, Takashi Abe, Jeremy P Loenneke
Blood flow restriction (BFR) training has been shown to increase muscle size and strength when combined with low-load [20-30 % one-repetition maximum (1RM)] resistance training in the lower body. Fewer studies have examined low-load BFR training in combination with upper body exercise, which may differ as some musculature cannot be directly restricted by the BFR stimulus (chest, shoulders). The objective of this study was to examine muscle adaptations occurring in the upper body in response to low-load BFR training...
January 2016: Sports Medicine
Yoko Ozawa, Takashi Koto, Hajime Shinoda, Kazuo Tsubota
Kaatsu training is an exercise method involving the application of pressure to the target muscle, and is being increasingly used in rehabilitation programs for heart disease patients in some hospitals. This method restricts blood flow to the muscles during exercise, and the resultant hypoxia effectively causes muscle hypertrophy and strengthening. However, no medical guidelines or risk factors for its use have been established.We report a case involving a 45-year-old man who suffered from 2 episodes of central retinal vein occlusion (CRVO), both occurring on the day following a Kaatsu training session...
September 2015: Medicine (Baltimore)
Marty D Spranger, Abhinav C Krishnan, Phillip D Levy, Donal S O'Leary, Scott A Smith
Blood flow restriction (BFR) training (also known as Kaatsu training) is an increasingly common practice employed during resistance exercise by athletes attempting to enhance skeletal muscle mass and strength. During BFR training, blood flow to the exercising muscle is mechanically restricted by placing flexible pressurizing cuffs around the active limb proximal to the working muscle. This maneuver results in the accumulation of metabolites (e.g., protons and lactic acid) in the muscle interstitium that increase muscle force and promote muscle growth...
November 2015: American Journal of Physiology. Heart and Circulatory Physiology
Thomas W Buford, Roger B Fillingim, Todd M Manini, Kimberly T Sibille, Kevin R Vincent, Samuel S Wu
As the U.S. population ages, efficacious interventions are needed to manage pain and maintain physical function among older adults with osteoarthritis (OA). Skeletal muscle weakness is a primary contributory factor to pain and functional decline among persons with OA, thus interventions are needed that improve muscle strength. High-load resistance exercise is the best-known method of improving muscle strength; however high-compressive loads commonly induce significant joint pain among persons with OA. Thus interventions with low-compressive loads are needed which improve muscle strength while limiting joint stress...
July 2015: Contemporary Clinical Trials
Ryan P Lowery, Jordan M Joy, Jeremy P Loenneke, Eduardo O de Souza, Marco Machado, Joshua E Dudeck, Jacob M Wilson
BACKGROUND: Resistance training in combination with practical blood flow restriction (pBFR) is thought to stimulate muscle hypertrophy by increasing muscle activation and muscle swelling. Most previous studies used the KAATSU device; however, little long-term research has been completed using pBFR. OBJECTIVE: To investigate the effects of pBFR on muscle hypertrophy. METHODS: Twenty college-aged male participants with a minimum of 1 year of resistance training experience were recruited for this study...
July 2014: Clinical Physiology and Functional Imaging
Alyssa Weatherholt, Matthew Beekley, Stephanie Greer, Mark Urtel, Alan Mikesky
PURPOSE: Although Kaatsu training involves low training loads, high perceived exertion and pain scores suggest that potential benefits may be offset by poor adherence or tolerance, particularly if applied in untrained or clinical populations. The purpose of this study was to investigate muscle adaptations, perceived exertion ratings, perceived sensations, and exercise adherence to a modified Kaatsu training protocol involving upper arm exercise. METHODS: Forty subjects ages 18-30 yr were assigned to exercise (EX) or nonexercise control (CON) groups...
May 2013: Medicine and Science in Sports and Exercise
T Yasuda, K Fukumura, T Fukuda, H Iida, H Imuta, Y Sato, T Yamasoba, T Nakajima
We examined the effects of blood flow-restricted, low-intensity resistance exercise (termed kaatsu) using an elastic band for resistance on muscle activation. Nine men performed triceps extension and biceps flexion exercises (four sets respectively) using an elastic band for resistance with blood flow restriction (BFR) or CON (unrestricted blood flow). During a BFR session, subjects wore pressure cuffs inflated to 170-260 mmHg on the proximal region of both arms. Surface electromyography (EMG) was recorded from the triceps brachii and biceps brachii muscles, and mean integrated EMG (iEMG) was analyzed...
February 2014: Scandinavian Journal of Medicine & Science in Sports
Haruko Iida, Toshiaki Nakajima, Miwa Kurano, Tomohiro Yasuda, Mikako Sakamaki, Yoshiaki Sato, Tatsuya Yamasoba, Takashi Abe
Venous compliance declines with age and improves with chronic endurance exercise. KAATSU, an exercise combined with blood flow restriction (BFR), is a unique training method for promoting muscle hypertrophy and strength gains by using low-intensity resistance exercises or walking. This method also induces pooling of venous blood in the legs. Therefore, we hypothesized that slow walking with BFR may affect limb venous compliance and examined the influence of 6 weeks of walking with BFR on venous compliance in older women...
November 2011: Clinical Physiology and Functional Imaging
Akinobu Nishimura, Masaaki Sugita, Ko Kato, Aki Fukuda, Akihiro Sudo, Atsumasa Uchida
PURPOSE: Recent studies have shown that low-intensity resistance training with vascular occlusion (kaatsu training) induces muscle hypertrophy. A local hypoxic environment facilitates muscle hypertrophy during kaatsu training. We postulated that muscle hypertrophy can be more efficiently induced by placing the entire body in a hypoxic environment to induce muscle hypoxia followed by resistance training. METHODS: Fourteen male university students were randomly assigned to hypoxia (Hyp) and normoxia (Norm) groups (n = 7 per group)...
December 2010: International Journal of Sports Physiology and Performance
J P Loenneke, T J Pujol
No abstract text is available yet for this article.
July 2010: Hippokratia
Jeremy P Loenneke, Monica L Kearney, Austin D Thrower, Sean Collins, Thomas J Pujol
Training at low intensities with moderate vascular occlusion results in increased muscle hypertrophy, strength, and endurance. Elastic knee wraps, applied to the proximal portion of the target muscle, might elicit a stimulus similar to the KAATSU Master Apparatus. The purpose of this study was to test the hypothesis that intermittently occluding the leg extensors with elastic knee wraps would increase whole-blood lactate (WBL) over control (CON). Twelve healthy men and women participated in this study (age 21...
October 2010: Journal of Strength and Conditioning Research
Takashi Abe, Mikako Sakamaki, Satoshi Fujita, Hayao Ozaki, Masato Sugaya, Yoshiaki Sato, Toshiaki Nakajima
PURPOSE: Slow-walk training combined with restricted leg muscular blood flow (KAATSU) produces muscle hypertrophy and strength gains in young men, which may lead to increased aerobic capacity and functional fitness. The purpose of this study was to investigate the effects of walk training combined with KAATSU on muscle size, strength, and functional ability, as well as aerobic capacity, in older participants. METHODS: A total of 19 active men and women, aged 60 to 78 years, were randomized into either a KAATSU-walk training group (n = 11, K-walk) or a nonexercising control group (n = 8, control)...
January 2010: Journal of Geriatric Physical Therapy
Daniel P Credeur, Brandon C Hollis, Michael A Welsch
UNLABELLED: Previous studies have shown that resistance training with restricted venous blood flow (Kaatsu) results in significant strength gains and muscle hypertrophy. However, few studies have examined the concurrent vascular responses following restrictive venous blood flow training protocols. PURPOSE: The purpose of this study was to examine the effects of 4 wk of handgrip exercise training, with and without venous restriction, on handgrip strength and brachial artery flow-mediated dilation (BAFMD)...
July 2010: Medicine and Science in Sports and Exercise
Toshiaki Nakajima, Haruko Iida, Miwa Kurano, Haruhito Takano, Toshihiro Morita, Kentaro Meguro, Yoshiaki Sato, Yoshihisa Yamazaki, Sino Kawashima, Hiroshi Ohshima, Shouichi Tachibana, Naokata Ishii, Takashi Abe
The KAATSU training is a unique method of muscle training with restricting venous blood flow, which might be applied to prevent muscle atrophy during space flight, but the effects of KAATSU in microgravity remain unknown. We investigated the hemodynamic responses to KAATSU during actually simulated weightlessness (6 degrees head-down tilt for 24 h, n = 8), and compared those to KAATSU in the seated position before bed rest. KAATSU was applied to the proximal ends of both the thighs. In the seated position before bed rest, sequential incrementing of KAATSU cuff pressure and altering the level of blood flow restriction resulted in a decrease in stroke volume (SV) with an increase in heart rate (HR)...
November 2008: European Journal of Applied Physiology
Summer B Cook, Brian C Clark, Lori L Ploutz-Snyder
UNLABELLED: Resistance training at low loads with blood flow restriction (BFR) (also known as Kaatsu) has been shown to stimulate increases in muscle size and strength. It is unclear how occlusion pressure, exercise intensity, and occlusion duration interact, or which combination of these factors results in the most potent muscle stimulus. PURPOSE: To determine the effect of eight BFR protocols on muscle fatigue (decrement in maximal voluntary contraction (MVC) after the performance of exercise), and to compare the decrement in MVC with the currently recommended resistance exercise intensity (~80% MVC)...
October 2007: Medicine and Science in Sports and Exercise
T Abe, C F Kearns, H C Manso Filho, Y Sato, K H McKeever
OBJECTIVE: The efficacy of KAATSU training has been demonstrated in human athletes, both as a therapeutic method as well as a training aid. The purpose of this study was to investigate the effects of slow walk training combined with restriction of muscle blood flow (KAATSU) on muscle and tendon size. METHODS: Six healthy, unfit Standardbred mares performed walking (240 m/min for 10 min and then 5 min recovery) with KAATSU, and 6 mares performed walking without KAATSU...
August 2006: Equine Veterinary Journal. Supplement
Haruko Iida, Miwa Kurano, Haruhito Takano, Nami Kubota, Toshihiro Morita, Kentaro Meguro, Yoshiaki Sato, Takashi Abe, Yoshihisa Yamazaki, Kansei Uno, Katsu Takenaka, Ken Hirose, Toshiaki Nakajima
The application of an orthostatic stress such as lower body negative pressure (LBNP) has been proposed to minimize the effects of weightlessness on the cardiovascular system and subsequently to reduce the cardiovascular deconditioning. The KAATSU training is a novel method to induce muscle strength and hypertrophy with blood pooling in capacitance vessels by restricting venous return. Here, we studied the hemodynamic, autonomic nervous and hormonal responses to the restriction of femoral blood flow by KAATSU in healthy male subjects, using the ultrasonography and impedance cardiography...
June 2007: European Journal of Applied Physiology
Takashi Abe, Charles F Kearns, Yoshiaki Sato
Previous studies have shown that low-intensity resistance training with restricted muscular venous blood flow (Kaatsu) causes muscle hypertrophy and strength gain. To investigate the effects of daily physical activity combined with Kaatsu, we examined the acute and chronic effects of walk training with and without Kaatsu on MRI-measured muscle size and maximum dynamic (one repetition maximum) and isometric strength, along with blood hormonal parameters. Nine men performed Kaatsu-walk training, and nine men performed walk training alone (control-walk)...
May 2006: Journal of Applied Physiology
Haruhito Takano, Toshihiro Morita, Haruko Iida, Ken-ichi Asada, Masayoshi Kato, Kansei Uno, Ken Hirose, Akihiro Matsumoto, Katsu Takenaka, Yasunobu Hirata, Fumio Eto, Ryozo Nagai, Yoshiaki Sato, Toshiaki Nakajima
We investigated the hemodynamic and hormonal responses to a short-term low-intensity resistance exercise (STLIRE) with the reduction of muscle blood flow. Eleven untrained men performed bilateral leg extension exercise under the reduction of muscle blood flow of the proximal end of both legs pressure-applied by a specially designed belt (a banding pressure of 1.3 times higher than resting systolic blood pressure, 160-180 mmHg), named as Kaatsu. The intensity of STLIRE was 20% of one repetition maximum. The subjects performed 30 repetitions, and after a 20-seconds rest, they performed three sets again until exhaustion...
September 2005: European Journal of Applied Physiology
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