scholarly journals Impact of Waist Stabilization Exercise with Blood Flow Restriction on White Area Index of Trunk Muscle Thickness Density

2016 ◽  
Vol 28 (2) ◽  
pp. 136-141 ◽  
Author(s):  
jae-Cheol Park ◽  
Yong-Nam Kim
Keyword(s):  
Blood Flow ◽  
Muscle Thickness ◽  
Trunk Muscle ◽  
Blood Flow Restriction ◽  
Area Index ◽  
Stabilization Exercise ◽  
White Area ◽  
Flow Restriction

The influence of exercise load with and without different levels of blood flow restriction on acute changes in muscle thickness and lactate

2016 ◽  
Vol 37 (6) ◽  
pp. 734-740 ◽  
Author(s):  
Jeremy P. Loenneke ◽  
Daeyeol Kim ◽  
Christopher A. Fahs ◽  
Robert S. Thiebaud ◽  
Takashi Abe ◽  
...  
Keyword(s):  
Blood Flow ◽  
Muscle Thickness ◽  
Blood Flow Restriction ◽  
Exercise Load ◽  
Flow Restriction ◽  
Acute Changes ◽  
Different Levels

scholarly journals The acute muscular response to two distinct blood flow restriction protocols

2017 ◽  
Vol 104 (1) ◽  
pp. 64-76 ◽  
Author(s):  
SJ Dankel ◽  
SL Buckner ◽  
BR Counts ◽  
MB Jessee ◽  
JG Mouser ◽  
...  
Keyword(s):  
Blood Flow ◽  
Muscle Growth ◽  
Arterial Occlusion ◽  
Muscle Thickness ◽  
Elbow Flexion ◽  
Blood Flow Restriction ◽  
Post Exercise ◽  
Flow Restriction ◽  
Acute Responses ◽  
Arterial Occlusion Pressure

The purpose of this study was to determine acute physiological and perceptual responses to two commonly implemented blood flow restriction protocols. Using a within-subject design, 15 participants (age ∼25) performed four sets of unilateral elbow flexion with each arm. One arm exercised using a 3-cm elastic cuff inflated to 160 mmHg, whereas the other arm exercised using a 5-cm nylon cuff inflated to 40% of the individual’s arterial occlusion pressure. While both protocols elicited increases in acute muscle thickness [pre: 4.5 (0.2) cm, post: 5.0 (0.2) cm; p < 0.001] and electromyography amplitude [first 3 reps: 55 (5) %MVC; last 3 reps: 87 (10) %MVC], there were no differences between conditions. Both protocols produced decreases in post-exercise strength (pre: 70 Nm, post: 51 Nm; p < 0.001) with no difference between conditions. The nylon protocol resulted in more repetitions during sets 2 [13 (2) vs. 9 (4); p = 0.001] and 3 [10 (2) vs. 7 (4); p = 0.05], while producing lower levels of discomfort following each set (average 3 vs. 4; p < 0.05). In conclusion, both protocols produced similar acute responses thought to be important for promoting muscle growth. However, the use of arbitrary pressures may place some individuals under complete arterial occlusion which may increase the potential risk of an adverse event.

scholarly journals Blood flow restriction augments the skeletal muscle response during very low-load resistance exercise to volitional failure

2019 ◽  
Vol 106 (2) ◽  
pp. 180-193 ◽  
Author(s):  
MB Jessee ◽  
SL Buckner ◽  
KT Mattocks ◽  
SJ Dankel ◽  
JG Mouser ◽  
...  
Keyword(s):  
Blood Flow ◽  
Resistance Exercise ◽  
Arterial Occlusion ◽  
Muscle Thickness ◽  
Load Resistance ◽  
Voluntary Contraction ◽  
Blood Flow Restriction ◽  
Flow Restriction ◽  
Emg Amplitude ◽  
Low Load

The purpose of this study was to compare the acute muscular response with resistance exercise between the following conditions [labeled (% one-repetition maximum/% arterial occlusion pressure)]: high-load (70/0), very low-load (15/0), very low-load with moderate (15/40), and high (15/80) blood flow restriction pressures. Twenty-three participants completed four sets of unilateral knee extension to failure (up to 90 repetitions) with each condition, one condition per leg, each day. Muscle thickness and maximal voluntary contraction (MVC) were measured before (Pre), immediately after (Post-0), and 15 min after (Post-15) exercise and electromyography (EMG) amplitude during exercise. Pre to Post-0 muscle thickness changes in cm [95% CI] were greater with 15/40 [0.57 (0.41, 0.73)] and 15/80 [0.49 (0.35, 0.62)] compared to 70/0 [0.33 (0.25, 0.40)]. Pre to Post-0 MVC changes in Nm [95% CI] were higher with 15/40 [−127.0 (−162.1, −91.9)] and 15/80 [−133.6 (−162.8, −104.4)] compared to 70/0 [−48.4 (−70.1, −26.6)] and 15/0 [−98.4 (−121.9, −74.9)], which were also different. Over the first three repetitions, EMG increased across sets, whereas in the last three repetitions it did not. EMG was also different between conditions and was generally greater during 70/0. Repetitions decreased across sets reaching the lowest for 70/0, and for very low loads decreased with increased pressure. In trained participants exercising to failure, lower load and the application of restriction pressure augment changes in muscle thickness and torque. The EMG amplitude was augmented by load. Training studies should compare these conditions, as the results herein suggest some muscular adaptations may differ.

Addition of blood flow restriction to passive mobilization reduces the rate of muscle wasting in elderly patients in the intensive care unit: a within-patient randomized trial

2018 ◽  
Vol 33 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Matheus Barbalho ◽  
Angel Caroline Rocha ◽  
Thamires Lorenzet Seus ◽  
Rodolfo Raiol ◽  
Fabrício Boscolo Del Vecchio ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Blood Flow ◽  
Intensive Care ◽  
Randomized Trial ◽  
Muscle Wasting ◽  
Muscle Thickness ◽  
Blood Flow Restriction ◽  
Flow Restriction ◽  
Control Limb ◽  
Passive Mobilization

Objective: To evaluate the addition of blood flow restriction to passive mobilization in patients in the intensive care unit. Design: The study was a within-patient randomized trial. Setting: Two intensive care units in Belém, from September to October 2017. Subjects: In total, 34 coma patients admitted to the intensive care unit sector, and 20 patients fulfilled the study requirements. Interventions: All participants received the passive mobilization protocol for lower limbs, and blood flow restriction was added only for one side in a concurrent fashion. Intervention lasted the entire patient’s hospitalization time. Main outcome measurement: Thigh muscle thickness and circumference. Results: In total, 34 subjects were enrolled in the study: 11 were excluded for exclusion criteria, 3 for death, and 20 completed the intervention (17 men and 3 women; mean age: 66 ± 4.3 years). Despite both groups presented atrophy, the atrophy rate was lower in blood flow restriction limb in relation to the control limb (–2.1 vs. –2.8 mm, respectively, in muscle thickness; P = 0.001). In addition, the blood flow restriction limb also had a smaller reduction in the thigh circumference than the control limb (–2.5 vs. –3.6 cm, respectively; P = 0.001). Conclusion: The use of blood flow restriction did not present adverse effects and seems to be a valid strategy to reduce the magnitude of the rate of muscle wasting that occurs in intensive care unit patients.

scholarly journals Acute Effects Of Resistance Training With And Without Blood Flow Restriction On Muscle Thickness

2018 ◽  
Vol 50 (5S) ◽  
pp. 18
Author(s):  
Iván Chulvi-Medrano ◽  
Moisés Picón ◽  
Juan M. Cortell-Tormo ◽  
Diego A. Alonso-Aubin ◽  
Tamara Rial ◽  
...  
Keyword(s):  
Blood Flow ◽  
Resistance Training ◽  
Muscle Thickness ◽  
Blood Flow Restriction ◽  
Acute Effects ◽  
Flow Restriction

Acute Muscular Responses to Practical Low-Load Blood Flow Restriction Exercise Versus Traditional Low-Load Blood Flow Restriction and High-/Low-Load Exercise

2020 ◽  
Vol 29 (7) ◽  
pp. 984-992 ◽  
Author(s):  
Robert S. Thiebaud ◽  
Takashi Abe ◽  
Jeremy P. Loenneke ◽  
Tyler Garcia ◽  
Yohan Shirazi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Isometric Contraction ◽  
Arterial Occlusion ◽  
Muscle Thickness ◽  
Blood Flow Restriction ◽  
Occlusion Pressure ◽  
Maximum Voluntary Isometric Contraction ◽  
Flow Restriction ◽  
Low Load ◽  
Arterial Occlusion Pressure

Context: Blood flow restriction (BFR) increases muscle size and strength when combined with low loads, but various methods are used to produce this stimulus. It is unclear how using elastic knee wraps can impact acute muscular responses compared with using nylon cuffs, where the pressure can be standardized. Objective: Investigate how elastic knee wraps compare with nylon cuffs and high-load (HL)/low-load (LL) resistance exercise. Design: A randomized cross-over experimental design using 6 conditions combined with unilateral knee extension. Setting: Human Performance Laboratory. Participants: A total of 9 healthy participants (males = 7 and females = 2) and had an average age of 22 (4) years. Intervention: LL (30% of 1-repetition maximum [1-RM]), HL (70% 1-RM), BFR at 40% of arterial occlusion pressure (BFR-LOW), BFR at 80% of arterial occlusion pressure (BFR-HIGH), elastic knee wraps stretched by 2 in (PRACTICAL-LOW), and elastic knee wraps stretched to a new length equivalent to 85% of thigh circumference (PRACTICAL-HIGH). BFR and practical conditions used 30% 1-RM. Main Outcome Measures: Muscle thickness, maximum voluntary isometric contraction, and electromyography amplitude. Bayesian statistics evaluated differences in changes between conditions using the Bayes factor (BF10), and median and 95% credible intervals were reported from the posterior distribution. Results: Total repetitions completed were greater for BFR-LOW versus PRACTICAL-HIGH (BF10 = 3.2, 48.6 vs 44 repetitions) and greater for PRACTICAL-LOW versus BFR-HIGH (BF10 = 717, 51.8 vs 36.3 repetitions). Greater decreases in changes in maximum voluntary isometric contraction were found in PRACTICAL-HIGH versus HL (BF10 = 1035, ∼103 N) and LL (BF10 = 45, ∼66 N). No differences in changes in muscle thickness were found between LL versus PRACTICAL-LOW/PRACTICAL-HIGH conditions (BF10 = 0.32). Greater changes in electromyography amplitude were also found for BFR-LOW versus PRACTICAL-HIGH condition (BF10 = 6.13, ∼12%), but no differences were noted between the other BFR conditions. Conclusions: Overall, elastic knee wraps produce a more fatiguing stimulus than LL or HL conditions and might be used as an alternative to pneumatic cuffs that are traditionally used for BFR exercise.

Time Course Change in Muscle Swelling: High-Intensity vs. Blood Flow Restriction Exercise

2017 ◽  
Vol 38 (13) ◽  
pp. 1009-1016 ◽  
Author(s):  
Eduardo Freitas ◽  
Christopher Poole ◽  
Ryan Miller ◽  
Aaron Heishman ◽  
Japneet Kaur ◽  
...  
Keyword(s):  
Blood Flow ◽  
Plasma Volume ◽  
High Intensity ◽  
Time Course ◽  
Muscle Thickness ◽  
Blood Flow Restriction ◽  
Thigh Circumference ◽  
Post Exercise ◽  
Flow Restriction ◽  
Low Intensity

AbstractThis study determined the time course for changes in muscle swelling and plasma volume following high (HI) and low-intensity resistance exercise with blood-flow restriction (LI-BFR). Ten male participants (22.1±3.0 yrs) completed three experimental conditions: high-intensity exercise (HI - 80% of 1RM), low-intensity exercise with BFR (LI-BFR –20% of 1RM, and 160 mmHg of BFR), and control (CON – no exercise or BFR). Muscle cross-sectional area (mCSA), muscle thickness, thigh circumference, and percentage change in plasma volume (PV%∆) were measured. mCSA was significantly greater than rest values at 15 min post-exercise (p<0.01) for HI and LI-BFR, and at 75 min post-exercise (p<0.01) for HI. Muscle thickness was significantly greater than rest immediately post-exercise (p<0.01) and 30 min post-exercise (p<0.01) for HI and LI-BFR, and at 60 min post-exercise for HI (p=0.01). Muscle thickness was greater for BFR immediately post-exercise compared to HI (p=0.01) post-exercise. Thigh circumference was significantly greater from rest at 15 min post-exercise (p=0.01) and at 75 min post-exercise for both LI-BFR (p=0.03) and HI (p<0.01). PV%∆ significantly decreased from rest immediately post-exercise for both HI (p<0.01) and LI-BFR (p<0.01). In conclusion, BFR exercise induces changes in muscle swelling and plasma volume similar to those observed at high-intensities.

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