The application of blood flow restriction during low-load resistance exercise has been shown to induce muscle growth with high or low restriction pressures, however, loads lower than 20% one-repetition maximum (1RM) remain unexplored. Fourteen trained individuals completed six elbow flexion protocols involving three different loads (10%, 15%, and 20% 1RM) each of which was performed with either a low (40% arterial occlusion) or high (80% arterial occlusion) pressure. Pre- and post-measurements of surface electromyography (sEMG), isometric torque, and muscle thickness were analyzed. An interaction was present for torque (p < 0.001) and muscle thickness (p < 0.001) illustrating that all increases in pressure and/or load resulted in a greater fatigue and muscle thickness. There was no interaction for sEMG (p = 0.832); however, there were main effects of condition (p = 0.002) and time (p = 0.019) illustrating greater sEMG in the 20% 1RM conditions. Higher blood flow restriction pressures may be more beneficial for muscle growth when very low loads are used.
Abe T , Fujita S , Nakajima T , Sakamaki M , Ozaki H , Ogasawara R , Sugaya M , Kudo M , Kurano M , Yasuda T , Sato Y , Ohshima H , Mukai C , Ishii N : Effects of low-intensity cycle training with restricted leg blood flow on thigh muscle volume and VO2max in young men. J. Sports Sci. Med. 9(3), 452–458 (2010)
Abe T , Kearns CF , Sato Y : Muscle size and strength are increased following walk training with restricted venous blood flow from the leg muscle, Kaatsu-walk training. J. Appl. Physiol. 100(5), 1460–1466 (2006)
Adam A , De Luca CJ : Firing rates of motor units in human vastus lateralis muscle during fatiguing isometric contractions. J. Appl. Physiol. 99(1), 268–280 (2005)
Clark BC , Fernhall B , Ploutz-Snyder LL : Adaptations in human neuromuscular function following prolonged unweighting: I. Skeletal muscle contractile properties and applied ischemia efficacy. J. Appl. Physiol. 101(1), 256–263 (2006)
Counts BR , Dankel SJ , Barnett BE , Kim D , Mouser JG , Allen KM , Thiebaud RS , Abe T , Bemben MG , Loenneke JP : Influence of relative blood flow restriction pressure on muscle activation and muscle adaptation. Muscle Nerve 53(3), 438–445 (2016)
Dankel SJ , Jessee MB , Abe T , Loenneke JP : The effects of blood flow restriction on upper-body musculature located distal and proximal to applied pressure. Sports Med. 46(1), 23–33 (2015)
Dankel SJ , Jessee MB , Mattocks KT , Mouser JG , Counts BR , Buckner SL , Loenneke JP : Training to fatigue: the answer for standardization when assessing muscle hypertrophy? Sports Med. 47(6), 1021–1027 (2017)
Fahs CA , Loenneke JP , Thiebaud RS , Rossow LM , Kim D , Abe T , Beck TW , Feeback DL , Bemben DA , Bemben MG : Muscular adaptations to fatiguing exercise with and without blood flow restriction. Clin. Physiol. Funct. Imaging 35(3), 167–176 (2015)
Farup J , de Paoli F , Bjerg K , Riis S , Ringgard S , Vissing K : Blood flow restricted and traditional resistance training performed to fatigue produce equal muscle hypertrophy. Scand J. Med. Sci. Sports 25(6), 754–763 (2015)
Fisher J , Steele J , Smith D : High- and low-load resistance training: interpretation and practical application of current research findings. Sports Med. 47, 393–400 (2017)
Head P , Austen B , Browne D , Campkin T , Barcellona M : Effect of practical blood flow restriction training during bodyweight exercise on muscular strength, hypertrophy and function in adults: a randomised controlled trial. Int. J. Ther. Rehabil. 22(6), 263–271 (2015)
Hermens HJ , Freriks B , Disselhorst-Klug C , Rau G : Development of recommendations for SEMG sensors and sensor placement procedures. J. Electromyogr. Kinesiol. 10(5), 361–374 (2000)
Järvholm U , Styf J , Suurkula M , Herberts P : Intramuscular pressure and muscle blood flow in supraspinatus. Eur. J. Appl. Physiol. 58(3), 219–224 (1988)
Kacin A , Strazar K : Frequent low-load ischemic resistance exercise to failure enhances muscle oxygen delivery and endurance capacity. Scand J. Med. Sci. Sports 21(6), e231–e241 (2011)
Kang DY , Kim HS , Lee KS , Kim YM : The effects of bodyweight-based exercise with blood flow restriction on isokinetic knee muscular function and thigh circumference in college students. J. Phys. Ther. Sci. 27(9), 2709–2712 (2015)
Laurentino G , Ugrinowitsch C , Aihara AY , Fernandes AR , Parcell AC , Ricard M , Tricoli V : Effects of strength training and vascular occlusion. Int. J. Sports Med. 29(8), 664–667 (2008)
Lixandrão ME , Ugrinowitsch C , Laurentino G , Libardi CA , Aihara AY , Cardoso FN , Tricoli V , Roschel H : Effects of exercise intensity and occlusion pressure after 12 weeks of resistance training with blood-flow restriction. Eur. J. Appl. Physiol. 115(12), 2471–2480 (2015)
Loenneke JP , Fahs CA , Rossow LM , Abe T , Bemben MG : The anabolic benefits of venous blood flow restriction training may be induced by muscle cell swelling. Med. Hypotheses 78(1), 151–154 (2012)
Loenneke JP , Fahs CA , Thiebaud RS , Rossow LM , Abe T , Ye X , Kim D , Bemben MG : The acute muscle swelling effects of blood flow restriction. Acta Physiol. Hung. 99(4), 400–410 (2012)
Loenneke JP , Kim D , Fahs CA , Thiebaud RS , Abe T , Larson RD , Bemben DA , Bemben MG : Effects of exercise with and without different degrees of blood flow restriction on torque and muscle activation. Muscle Nerve 51(5), 713–721 (2015)
Loenneke JP , Wilson GJ , Wilson JM : A mechanistic approach to blood flow occlusion. Int. J. Sports Med. 31(1), 1–4 (2010)
Loenneke JP , Wilson JM , Marín PJ , Zourdos MC , Bemben MG : Low intensity blood flow restriction training: a meta-analysis. Eur. J. Appl. Physiol. 112(5), 1849–1859 (2011)
Morton RW , McGlory C , Phillips SM : Nutritional interventions to augment resistance training-induced skeletal muscle hypertrophy. Front. Physiol. 6, 245 (2015)
Motykie GD , Zebala LP , Caprini JA , Lee CE , Arcelus JI , Reyna JJ , Cohen EB : A guide to venous thromboembolism risk factor assessment. J. Thromb. Thrombolysis 9(3), 253–262 (2000)
Pearson SJ , Hussain SR : A review on the mechanisms of blood-flow restriction resistance training-induced muscle hypertrophy. Sports Med. 45(2), 187–200 (2015)
Weir JP : Quantifying test-retest reliability using the intraclass correlation coefficient and the SEM. J. Strength Cond. Res. 19(1), 231–240 (2005)
Westad C , Westgaard RH , De Luca CJ : Motor unit recruitment and derecruitment induced by brief increase in contraction amplitude of the human trapezius muscle. J. Physiol. 552(Pt. 2), 645–656 (2003)
Westgaard RH , de Luca CJ : Motor unit substitution in long-duration contractions of the human trapezius muscle. J. Neurophysiol. 82(1), 501–504 (1999)
Yasuda T , Loenneke JP , Thiebaud RS , Abe T : Effects of blood flow restricted low-intensity concentric or eccentric training on muscle size and strength. PLoS One 7(12), e52843 (2012)