Medicine:Blood flow restriction training

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Blood flow restriction training / Occlusion Training (also abbreviated BFR training[1]) or Occlusion Training or KAATSU is an exercise and rehabilitation modality where resistance exercise, aerobic exercise or physical therapy movements are performed while using an Occlusion Cuff which is applied to the proximal aspect of the muscle on either the arms or legs.[2] In this novel training method developed in Japan by Dr. Yoshiaki Sato in 1966,[3] limb (legs or arms) venous blood flow is restricted via the occlusion cuff throughout the contraction cycle and rest period. This result is partial restriction of arterial inflow to muscle, but, most significantly, it restricts venous outflow from the muscle.[4] Given the light-load and strengthening capacity of BFR training, it can provide an effective clinical rehabilitation stimulus without the high levels of joint stress and cardiovascular risk associated with heavy-load training.[5]

Application

Practitioners include physical therapists, orthopedic surgeons, chiropractors, trainers, coaches and athletes. Users include individuals who are injured and disabled. Occlusion cuffs are of various widths. The use of occlusion cuffs is based on published scientific literature.[6] The current approaches that focus on applying BFR during exercise consist of automatic pneumatic tourniquet systems or handheld inflatable devices. Research demonstrating the influence of thigh circumference and cuff width[7] on occlusion pressure indicates a likely need for an individualised approach to BFR, particularly with regard to the setting of the restriction pressure.

More recently,[when?] a technique to calculate and prescribe the occlusive stimulus as a percentage of total limb occlusion pressure is just one example of efforts to account for the above factors and provide an individualised approach to prescribing BFR training. While the relationship between BFR pressure and the underlying tissue compression during exercise is not yet fully understood, BFR training using 40%–80% of limb occlusion pressure is safe and effective when supervised by experienced practitioners;[8] therefore, lower pressures may provide less risk without the need for higher pressure.[9] Professor Sir Yoshiaki Sato, M.D., Ph.D. of Tokyo, Japan invented KAATSU Training or BFR in 1966 in Tokyo, Japan and is the Chief Executive Office of KAATSU Japan Co., Ltd.[10]

Physiology

Blood flow restriction training combined with low intensity resistance training may be able to provide similar effects on muscle hypertrophy as high intensity resistance training alone. During high intensity resistance training, lactate is released and builds up in the muscles. Lactate build up increases the amount of growth hormone available. Growth hormone stimulates IGF-1, which combines satellite cells with muscle fibers to create new muscle cells. Since the effects of blood flow restriction training have proven to be similar to those of high intensity resistance training alone, blood flow restriction training with low intensity training can potentially induce muscle hypertrophy while placing less stress on injured joints, allowing for continued recovery. [11] Furthermore, additional physiological changes observed during BFR training include greater fast-twitch muscle fiber recruitment, increased growth hormone levels, and increased post-exercise hypotension.[12]

Adaptations

Historically, exercise loads of approximately 70% of an individual's one repetition maximum (1RM) have been deemed necessary to elicit muscle hypertrophy and strength gains.[13] In recent years, research has demonstrated that augmentation of low-load resistance training with blood flow restriction (LL-BFR) to the active muscles can produce significant hypertrophy and strength gains,[14][15] using loads as low as 30% 1RM.[16] BFR training has been found to yield hypertrophy responses comparable to that observed with heavy-load resistance training.[17] Recently,(2019) it has also been indicated that BFR training induces beneficial changes in tendon structure and tendon stiffness.[18]

Benefits

BFRT has been shown to improve physical function, and improve pain and stiffness in patients with knee osteoarthritis (OA). When BFRT is used with the quadriceps, it not only increases lower limb muscle mass and strength, but significantly improves the functionality of the knee. Studies have shown that BFR training also allows patients with knee (OA) to endure more intense exercises with less pain. In other words, patients who used BFR training for exercises were compared to patients who did not, and it was found that those who used BFR training were less likely to discontinue their exercises due to pain.[12] BFRT has shown to be a promising adjuvant therapy in dermatomyositis, polymyositis, and inclusion body myositis.[19]

BFRT has been shown to directly improve muscle strength and size in addition to markers of sports performance. The sports specific tests that have been implicated to improve with BFRT include: sprint testing, countermovement jump power, muscular endurance, agility test, vertical jump test, and 20-m shuttle run test. Of four studies that have tested BFR's affects on sports performance, three of them showed significant improvement in at least one of the aforementioned metrics with use of low loaded BFR when training.[20]

While low-load BFRT has been shown to contribute to muscle development in well-trained athletes, it has been noted that the neural stimulus of the muscle is different than high-load resistance training. A combination of traditional high-load resistance training and low-load BFRT will provide maximal results for athletes.[20]

Risks

When using belts and lifting straps as a tourniquet, the amount of pressure on the vasculature cannot be controlled and there are reports of rhabdomyolysis cases due to VOT (Vascular Occlusion Training).[21] The original inventor of BFR training, Dr. Yoshiaki Sato, experimented between 1966 and 1973 to understand the precise pressure ranges for people of all ages that were safe and effective. These ranges were later confirmed by cardiologists Toshiaki Nakajima, M.D., Ph.D. and Morita Toshihiro, M.D., Ph.D. at the University of Tokyo Hospital on over 7,000 cardiac rehabilitation subjects between 2004 and 2014.

See also

  • Kaatsu

References

  1. ↑ "Tip: Try Blood Flow Restriction Training". 13 June 2016. https://www.t-nation.com/training/tip-try-blood-flow-restriction-training. 
  2. ↑ Scott, Brendan R.; Loenneke, Jeremy P.; Slattery, Katie M.; Dascombe, Ben J. (March 2015). "Exercise with blood flow restriction: an updated evidence-based approach for enhanced muscular development". Sports Medicine (Auckland, N.Z.) 45 (3): 313–325. doi:10.1007/s40279-014-0288-1. ISSN 1179-2035. PMID 25430600. http://researchrepository.murdoch.edu.au/id/eprint/33345/. 
  3. ↑ ^ Sato, Yoshiaki (2020-03-28) “The History, Mechanism and Relevance of KAATSU” Note: https://www.kaatsublog.com/2020/03/the-history-mechanism-and-relevance-of.html
  4. ↑ Patterson, Stephen D.; Hughes, Luke; Head, Paul; Warmington, Stuart; Brandner, Christopher (2017-06-22). "Blood flow restriction training: a novel approach to augment clinical rehabilitation: how to do it" (in en). Br J Sports Med 51 (23): bjsports–2017–097738. doi:10.1136/bjsports-2017-097738. ISSN 0306-3674. PMID 28642225. https://bjsm.bmj.com/content/early/2017/06/22/bjsports-2017-097738. 
  5. ↑ Hughes, Luke; Paton, Bruce; Rosenblatt, Ben; Gissane, Conor; Patterson, Stephen David (2017-07-01). "Blood flow restriction training in clinical musculoskeletal rehabilitation: a systematic review and meta-analysis" (in en). Br J Sports Med 51 (13): 1003–1011. doi:10.1136/bjsports-2016-097071. ISSN 0306-3674. PMID 28259850. https://bjsm.bmj.com/content/51/13/1003. 
  6. ↑ Patterson, Stephen D.; Brandner, Christopher R. (February 2017). "The role of blood flow restriction training for applied practitioners: A questionnaire-based survey". Journal of Sports Sciences 36 (2): 123–130. doi:10.1080/02640414.2017.1284341. ISSN 0264-0414. PMID 28143359. http://research.stmarys.ac.uk/1360/1/The%20role%20of%20BFR%20training%20for%20applied%20practitioners%20Proof%20copy%20open%20access.pdf. 
  7. ↑ Loenneke, Jeremy P.; Fahs, Christopher A.; Rossow, Lindy M.; Sherk, Vanessa D.; Thiebaud, Robert S.; Abe, Takashi; Bemben, Debra A.; Bemben, Michael G. (2011-12-06). "Effects of cuff width on arterial occlusion: implications for blood flow restricted exercise". European Journal of Applied Physiology 112 (8): 2903–2912. doi:10.1007/s00421-011-2266-8. ISSN 1439-6319. PMID 22143843. 
  8. ↑ Soligon, SD; Lixandrão, ME; Biazon, TMPC; Angleri, V; Roschel, H; Libardi, CA (September 2018). "Lower occlusion pressure during resistance exercise with blood-flow restriction promotes lower pain and perception of exercise compared to higher occlusion pressure when the total training volume is equalized". Physiology International 105 (3): 276–284. doi:10.1556/2060.105.2018.3.18. ISSN 2498-602X. PMID 30269562. http://real.mtak.hu/87383/1/2060.105.2018.3.18.pdf. 
  9. ↑ Nakajima, Toshiaki; Tomohiro, Yasuda; Morita, Toshihiro (2014). 22nd Century Medical Center Donation Course. Department of Ischemic Circulatory Physiology, Kaatsu (1st ed.). https://www.kaatsu.com. 
  10. ↑ Futterman, Matthew (21 July 2021). "A Hot Fitness Trend Among Olympians: Blood Flow Restriction" (in English). nytimes.com (USA). https://www.nytimes.com/2021/07/21/sports/olympics/athletes-blood-flow-restriction.html. 
  11. ↑ Charles, Derek; White, Ryan; Reyes, Caleb; Palmer, Drew (December 2020). "A Systematic Review of the Effects of Blood Flow Restriction Training on Quadriceps Muscle Atrophy and Circumference Post Acl Reconstruction". International Journal of Sports Physical Therapy 15 (6): 882–891. doi:10.26603/ijspt20200882. ISSN 2159-2896. PMID 33344004. 
  12. ↑ 12.0 12.1 Grantham, Brayden; Korakakis, Vasileios; O’Sullivan, Kieran (2021-05-01). "Does blood flow restriction training enhance clinical outcomes in knee osteoarthritis: A systematic review and meta-analysis" (in en). Physical Therapy in Sport 49: 37–49. doi:10.1016/j.ptsp.2021.01.014. ISSN 1466-853X. PMID 33582442. https://www.sciencedirect.com/science/article/pii/S1466853X21000158. 
  13. ↑ Garber, Carol Ewing; Blissmer, Bryan; Deschenes, Michael R.; Franklin, Barry A.; Lamonte, Michael J.; Lee, I-Min; Nieman, David C.; Swain, David P. (July 2011). "Quantity and Quality of Exercise for Developing and Maintaining Cardiorespiratory, Musculoskeletal, and Neuromotor Fitness in Apparently Healthy Adults" (in en). Medicine & Science in Sports & Exercise 43 (7): 1334–1359. doi:10.1249/mss.0b013e318213fefb. ISSN 0195-9131. PMID 21694556. 
  14. ↑ BURGOMASTER, KIRSTEN A.; MOORE, DAN R.; SCHOFIELD, LEE M.; PHILLIPS, STUART M.; SALE, DIGBY G.; GIBALA, MARTIN J. (July 2003). "Resistance Training with Vascular Occlusion: Metabolic Adaptations in Human Muscle" (in en). Medicine & Science in Sports & Exercise 35 (7): 1203–1208. doi:10.1249/01.mss.0000074458.71025.71. ISSN 0195-9131. PMID 12840643. 
  15. ↑ Loenneke, Jeremy P.; Kim, Daeyeol; Fahs, Christopher A.; Thiebaud, Robert S.; Abe, Takashi; Larson, Rebecca D.; Bemben, Debra A.; Bemben, Michael G. (2015-04-20). "Effects of exercise with and without different degrees of blood flow restriction on torque and muscle activation" (in en). Muscle & Nerve 51 (5): 713–721. doi:10.1002/mus.24448. ISSN 0148-639X. PMID 25187395. 
  16. ↑ Takarada, Yudai; Tsuruta, Tomomi; Ishii, Naokata (2004). "Cooperative Effects of Exercise and Occlusive Stimuli on Muscular Function in Low-Intensity Resistance Exercise with Moderate Vascular Occlusion". The Japanese Journal of Physiology 54 (6): 585–592. doi:10.2170/jjphysiol.54.585. ISSN 0021-521X. PMID 15760491. 
  17. ↑ Loenneke, Jeremy P.; Wilson, Jacob M.; Marín, Pedro J.; Zourdos, Michael C.; Bemben, Michael G. (2011-09-16). "Low intensity blood flow restriction training: a meta-analysis" (in en). European Journal of Applied Physiology 112 (5): 1849–1859. doi:10.1007/s00421-011-2167-x. ISSN 1439-6319. PMID 21922259. 
  18. ↑ Centner, Christoph; Lauber, Benedikt; Seynnes, Olivier R.; Jerger, Simon; Sohnius, Tim; Gollhofer, Albert; König, Daniel (2019-12-12). "Low-load blood flow restriction training induces similar morphological and mechanical Achilles tendon adaptations compared with high-load resistance training" (in en). Journal of Applied Physiology 127 (6): 1660–1667. doi:10.1152/japplphysiol.00602.2019. ISSN 8750-7587. PMID 31725362. http://doc.rero.ch/record/328016/files/koe_llb.pdf. 
  19. ↑ Ferraz, Rodrigo Branco; Gualano, Bruno; Rodrigues, Reynaldo; Kurimori, Ceci Obara; Fuller, Ricardo; Lima, Fernanda Rodrigues; DE Sá-Pinto, Ana Lúcia; Roschel, Hamilton (May 2018). "Benefits of Resistance Training with Blood Flow Restriction in Knee Osteoarthritis". Medicine and Science in Sports and Exercise 50 (5): 897–905. doi:10.1249/MSS.0000000000001530. ISSN 1530-0315. PMID 29266093. https://pubmed.ncbi.nlm.nih.gov/29266093. 
  20. ↑ 20.0 20.1 Wortman, Ryan J.; Brown, Symone M.; Savage-Elliott, Ian; Finley, Zachary J.; Mulcahey, Mary K. (June 2021). "Blood Flow Restriction Training for Athletes: A Systematic Review" (in en). The American Journal of Sports Medicine 49 (7): 1938–1944. doi:10.1177/0363546520964454. ISSN 0363-5465. PMID 33196300. http://journals.sagepub.com/doi/10.1177/0363546520964454. 
  21. ↑ Big Ass Mass: Occlusion Training, Bryan Haycock, FLEX



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