scholarly journals Comparison of growth hormone and insulin-like growth factor-1 responses to high intensity and low intensity resistance training with and without blood flow restriction in adolescent male athletes

2019 ◽  
Vol 41 (4) ◽  
pp. 40-48
Author(s):  
Sirous Choobineh ◽  
Ali Akbarnejad ◽  
Vahidreza Kakavand ◽  
Morteza Yari
Keyword(s):  
Growth Hormone ◽  
Blood Flow ◽  
Growth Factor ◽  
Resistance Training ◽  
High Intensity ◽  
Blood Flow Restriction ◽  
Adolescent Male ◽  
Male Athletes ◽  
Flow Restriction ◽  
Low Intensity

scholarly journals The Effect of Eccentric Resistance Training with and Without Blood Flow Restriction on Serum IL6 and MMP9 Levels in Young Active Men

2020 ◽  
Vol 7 (4) ◽  
Author(s):  
Mohammad Eslamdoust ◽  
Farshad Ghazalian ◽  
Mandana Gholami ◽  
Khosrow Ebrahim ◽  
Behzad Bazgir
Keyword(s):  
Blood Flow ◽  
Resistance Training ◽  
Resistance Exercise ◽  
Eccentric Exercise ◽  
High Intensity ◽  
Young Men ◽  
Blood Flow Restriction ◽  
Exercise Modality ◽  
Flow Restriction ◽  
Low Intensity

Background: It has been assumed that during and after BFR exercises, many blood factors are activated and angiogenesis response is stimulated in the arteries. Objectives: Therefore, the current study aimed to determine the effect of two eccentric resistance training methods with and without blood flow restriction on serum IL6 and MMP9 levels in active young men. Methods: In this quasi-experimental study, 16 healthy men with a mean age of 27.8 ± 2.85 (years), the weight of 79.4 ± 12.4 (kg), and a body mass index of 25.5 ± 3.7 (kg/m2) were randomly assigned to either low-intensity eccentric group with BFR or the high-intensity eccentric without BFR. The high-intensity (70% - 80% maximum voluntary contraction MVC) eccentric exercise without BFR included 3 - 5 cycles of eccentric contraction of the quadriceps muscles, up to exhaustion, whereas low-intensity eccentric exercise executed similar exercise modality at intensity of 20% - 30% MVC with blood flow restriction up to exhaustion. Blood samples were taken from antecubital both before and after the exercise to measure serum IL6 and MMP9 values using the ELISA method. Data were analyzed using paired t-test and analysis of variance with repeated measure test in SPSS version 22. A P value of < 0.05 was defined as statistically significant. Results: High-intensity resistance per se and low-intensity resistance exercise with BFR similarly resulted in a non-significant reduction of IL-6 and elevated levels of MMP-9 serum levels in active young men. Conclusions: Overall, the results indicated that a low-intensity resistance exercise session with restricted blood flow and a high-intensity resistance exercise without blood flow restriction equally did not affect IL6 and MMP9 serum of active young men. Further studies are needed to clarify the exact exercise modality that sufficiently stimulates angiogenesis.

scholarly journals Effects of a blood flow restriction exercise under different pressures on testosterone, growth hormone, and insulin-like growth factor levels

2021 ◽  
Vol 49 (9) ◽  
pp. 030006052110395
Author(s):  
Li Yinghao ◽  
Yang Jing ◽  
Wang Yongqi ◽  
Zhou Jianming ◽  
Gao Zeng ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Blood Flow ◽  
Growth Factor ◽  
Resistance Exercise ◽  
Blood Flow Restriction ◽  
The Other ◽  
High Group ◽  
Testosterone Levels ◽  
Flow Restriction ◽  
Low Intensity

Objective To investigate the changes in serum growth hormone (GH), testosterone, and insulin-like growth factor 1 (IGF-1) during low-intensity resistance exercise under different cuff pressures. Methods We performed a single-blind, cross-over design study. Twenty-five healthy young men performed three exercise protocols as follows: 1) no blood flow restriction exercise (control group), 2) resistance exercise at 40% of arterial occlusion pressure (AOP) (low group), and 3) resistance exercise at 70% of AOP (high group). Blood lactate, GH, testosterone, and IGF-1 levels were measured at four time points. Results There were no differences in the indices before exercise. The blood flow restriction exercise under different pressures had different effects on each index and there was an interactive effect. GH levels were significantly higher in the high group than in the other groups after exercise. Immediately after exercise, IGF-1 and testosterone levels were significantly higher in the high group than in the other groups. At 15 minutes after exercise, testosterone levels were significantly higher in the high group than in the other groups. Conclusions Low-intensity resistance exercise combined with blood flow restriction effectively increases GH, IGF-1, and testosterone levels in young men. Increasing the cuff pressure results in greater levels of hormone secretion.

Combined effects of low-intensity blood flow restriction training and high-intensity resistance training on muscle strength and size

2011 ◽  
Vol 111 (10) ◽  
pp. 2525-2533 ◽  
Author(s):  
Tomohiro Yasuda ◽  
Riki Ogasawara ◽  
Mikako Sakamaki ◽  
Hayao Ozaki ◽  
Yoshiaki Sato ◽  
...  
Keyword(s):  
Blood Flow ◽  
Resistance Training ◽  
Muscle Strength ◽  
High Intensity ◽  
Blood Flow Restriction ◽  
Combined Effects ◽  
Flow Restriction ◽  
Low Intensity

Intramuscular metabolism during low-intensity resistance exercise with blood flow restriction

2009 ◽  
Vol 106 (4) ◽  
pp. 1119-1124 ◽  
Author(s):  
Tadashi Suga ◽  
Koichi Okita ◽  
Noriteru Morita ◽  
Takashi Yokota ◽  
Kagami Hirabayashi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Resistance Training ◽  
Resistance Exercise ◽  
High Intensity ◽  
Plantar Flexion ◽  
Blood Flow Restriction ◽  
Resonance Spectroscopy ◽  
Flow Restriction ◽  
Low Intensity ◽  
Intramuscular Ph

Although recent studies have reported that low-intensity resistance training with blood flow restriction could stress the muscle effectively and provide rapid muscle hypertrophy and strength gain equivalent to those of high-intensity resistance training, the exact mechanism and its generality have not yet been clarified. We investigated the intramuscular metabolism during low-intensity resistance exercise with blood flow restriction and compared it with that of high-intensity and low-intensity resistance exercises without blood flow restriction using 31P-magnetic resonance spectroscopy. Twenty-six healthy subjects (22 ± 4 yr) participated and performed unilateral plantar flexion (30 repetitions/min) for 2 min. Protocols were as follows: low-intensity exercise (L) using a load of 20% of one-repetition maximum (1 RM), L with blood flow restriction (LR), and high-intensity exercise using 65% 1 RM (H). Intramuscular phosphocreatine (PCr) and diprotonated phosphate (H2PO4−) levels and intramuscular pH at rest and during exercise were obtained. We found that the PCr depletion, the H2PO4− increase, and the intramuscular pH decrease during LR were significantly greater than those in L ( P < 0.001); however, those in LR were significantly lower than those in H ( P < 0.001). The recruitment of fast-twitch fiber evaluated by inorganic phosphate splitting occurred in only 31% of the subjects in LR, compared with 70% in H. In conclusion, the metabolic stress in skeletal muscle during low-intensity resistance exercise was significantly increased by applying blood flow restriction, but did not generally reach that during high-intensity resistance exercise. This new method of resistance training needs to be examined for optimization of the protocol to reach equivalence with high-intensity resistance training.

Early phase adaptations in muscle strength and hypertrophy as a result of low-intensity blood flow restriction resistance training

2018 ◽  
Vol 118 (9) ◽  
pp. 1831-1843 ◽  
Author(s):  
Ethan C. Hill ◽  
Terry J. Housh ◽  
Joshua L. Keller ◽  
Cory M. Smith ◽  
Richard J. Schmidt ◽  
...  
Keyword(s):  
Blood Flow ◽  
Resistance Training ◽  
Muscle Strength ◽  
Early Phase ◽  
Blood Flow Restriction ◽  
Flow Restriction ◽  
Low Intensity

Acute Muscular Responses To High Intensity And Low Intensity With Blood Flow Restriction Cycling

2014 ◽  
Vol 46 ◽  
pp. 883
Author(s):  
Daeyeol Kim ◽  
Jeremy P. Loenneke ◽  
Robert S. Thiebaud ◽  
Xin Ye ◽  
Grant Mouser ◽  
...  
Keyword(s):  
Blood Flow ◽  
High Intensity ◽  
Blood Flow Restriction ◽  
Flow Restriction ◽  
Low Intensity ◽  
Muscular Responses

scholarly journals Resistance Training with Blood Flow Restriction Compared to Traditional Resistance Training on Strength and Muscle Mass in Non-Active Older Adults: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 18 (21) ◽  
pp. 11441
Author(s):  
Darío Rodrigo-Mallorca ◽  
Andrés Felipe Loaiza-Betancur ◽  
Pablo Monteagudo ◽  
Cristina Blasco-Lafarga ◽  
Iván Chulvi-Medrano
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Blood Flow ◽  
Resistance Training ◽  
Muscle Mass ◽  
High Intensity ◽  
Meta Analysis ◽  
Small Sample ◽  
Blood Flow Restriction ◽  
Flow Restriction

Low-intensity training with blood flow restriction (LI-BFR) has been suggested as an alternative to high-intensity resistance training for the improvement of strength and muscle mass, becoming advisable for individuals who cannot assume such a load. The systematic review aimed to determine the effectiveness of the LI-BFR compared to dynamic high-intensity resistance training on strength and muscle mass in non-active older adults. A systematic review was conducted according to the Cochrane Handbook and reportedly followed the PRISMA statement. MEDLINE, EMBASE, Web of Science Core Collection, and Scopus databases were searched between September and October 2020. Two reviewers independently selected the studies, extracted data, assessed the risk of bias and the quality of evidence using the GRADE approach. Twelve studies were included in the qualitative synthesis. Meta-analysis pointed out significant differences in maximal voluntary contraction (MVC): SMD 0.61, 95% CI [0.10, 1.11], p = 0.02, I2 71% p < 0.0001; but not in the repetition maximum (RM): SMD 0.07, 95% CI [−0.25, 0.40], p = 0.66, I2 0% p < 0.53; neither in the muscle mass: SMD 0.62, 95% CI [−0.09, 1.34], p = 0.09, I2 59% p = 0.05. Despite important limitations such as scarce literature regarding LI-BFR in older adults, the small sample size in most studies, the still differences in methodology and poor quality in many of them, this systematic review and meta-analysis revealed a positive benefit in non-active older adults. LI- BFR may induce increased muscular strength and muscle mass, at least at a similar extent to that in the traditional high-intensity resistance training.

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