Comparison of skeletal muscle ultrastructural changes between normal and blood flow restricted resistance exercise: A case report

2021 ◽  
Author(s):  
Dylan T. Wilburn ◽  
Steven B. Machek ◽  
Bernd Zechmann ◽  
Darryn S. Willoughby
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Case Report ◽  
Resistance Exercise ◽  
Ultrastructural Changes

scholarly journals Low-load resistance training to task failure with and without blood flow restriction: muscular functional and structural adaptations

2020 ◽  
Vol 318 (2) ◽  
pp. R284-R295 ◽  
Author(s):  
Christopher Pignanelli ◽  
Heather L. Petrick ◽  
Fatemeh Keyvani ◽  
George J. F. Heigenhauser ◽  
Joe Quadrilatero ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Resistance Training ◽  
Resistance Exercise ◽  
Load Resistance ◽  
Muscle Endurance ◽  
Flow Restriction ◽  
Muscle Adaptations ◽  
Low Load ◽  
Skeletal Muscle Adaptations

The application of blood flow restriction (BFR) during resistance exercise is increasingly recognized for its ability to improve rehabilitation and for its effectiveness in increasing muscle hypertrophy and strength among healthy populations. However, direct comparison of the skeletal muscle adaptations to low-load resistance exercise (LL-RE) and low-load BFR resistance exercise (LL-BFR) performed to task failure is lacking. Using a within-subject design, we examined whole muscle group and skeletal muscle adaptations to 6 wk of LL-RE and LL-BFR training to repetition failure. Muscle strength and size outcomes were similar for both types of training, despite ~33% lower total exercise volume (load × repetition) with LL-BFR than LL-RE (28,544 ± 1,771 vs. 18,949 ± 1,541 kg, P = 0.004). After training, only LL-BFR improved the average power output throughout the midportion of a voluntary muscle endurance task. Specifically, LL-BFR training sustained an 18% greater power output from baseline and resulted in a greater change from baseline than LL-RE (19 ± 3 vs. 3 ± 4 W, P = 0.008). This improvement occurred despite histological analysis revealing similar increases in capillary content of type I muscle fibers following LL-RE and LL-BFR training, which was primarily driven by increased capillary contacts (4.53 ± 0.23 before training vs. 5.33 ± 0.27 and 5.17 ± 0.25 after LL-RE and LL-BFR, respectively, both P < 0.05). Moreover, maximally supported mitochondrial respiratory capacity increased only in the LL-RE leg by 30% from baseline ( P = 0.006). Overall, low-load resistance training increased indexes of muscle oxidative capacity and strength, which were not further augmented with the application of BFR. However, performance on a muscle endurance test was improved following BFR training.

scholarly journals Dose Gender Affect Skeletal Muscle Response To Resistance Exercise With Blood Flow Restriction?

2009 ◽  
Vol 41 ◽  
pp. 474-475
Author(s):  
Shingo Takada ◽  
Okita Koichi ◽  
Tadashi Suga ◽  
Noriteru Morita ◽  
Masashi Omokawa ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Resistance Exercise ◽  
Blood Flow Restriction ◽  
Muscle Response ◽  
Flow Restriction

Acute skeletal muscle responses to very low‐load resistance exercise with and without the application of blood flow restriction in the upper body

2018 ◽  
Vol 39 (3) ◽  
pp. 201-208 ◽  
Author(s):  
Samuel L. Buckner ◽  
Matthew B. Jessee ◽  
Scott J. Dankel ◽  
Kevin T. Mattocks ◽  
J. Grant Mouser ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Resistance Exercise ◽  
Load Resistance ◽  
Blood Flow Restriction ◽  
Upper Body ◽  
Flow Restriction ◽  
Low Load ◽  
Muscle Responses

Resistance exercise order does not determine postexercise delivery of testosterone, growth hormone, and IGF-1 to skeletal muscle

2013 ◽  
Vol 38 (2) ◽  
pp. 220-226 ◽  
Author(s):  
Daniel W.D. West ◽  
Lisa M. Cotie ◽  
Cameron J. Mitchell ◽  
Tyler A. Churchward-Venne ◽  
Maureen J. MacDonald ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Growth Hormone ◽  
Blood Flow ◽  
Growth Factor ◽  
Resistance Exercise ◽  
Brachial Artery ◽  
Artery Blood Flow ◽  
Arm Exercise ◽  
Before And After ◽  
Leg Exercise

Does resistance exercise order affect hormone availability? Participants performed arm exercise before and after leg exercise. Hormone delivery was estimated by multiplying brachial artery blood flow and hormone concentrations. Blood flow increased after arm (276%) and leg (193%; both p < 0.001) exercise. Testosterone, growth hormone, and insulin-like growth factor 1 showed with distinct delivery patterns between conditions; however (interactions all p < 0.001), net exposure was similar. The anabolic potential of postexercise hormones was not affected by exercise order.

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