Practical blood flow restriction training increases muscle hypertrophy during a periodized resistance training programme. (4th November 2013)

• Record Type: Journal Article
• Authors: Lowery, Ryan P.; Joy, Jordan M.; Loenneke, Jeremy P.; de Souza, Eduardo O.; Machado, Marco; Dudeck, Joshua E.; Wilson, Jacob M.
• Is Part Of: Clinical physiology and functional imaging. Volume 34:Number 4(2014:Jul.)
• Page Start: 317
• Page End: 321
• Publication Date: 2013-11-04
• Subjects: Physiology, Pathological -- Periodicals; Diagnostic imaging -- Periodicals; 612
• DOI: 10.1111/cpf.12099
• Languages: English
• ISSNs: 1475-0961

Abstract

<abstract abstract-type="main" id="cpf12099-abs-0001"> <title>Summary</title> <sec id="cpf12099-sec-0001" sec-type="section"> <title>Background</title> <p>Resistance training in combination with practical blood flow restriction (pBFR) is thought to stimulate muscle hypertrophy by increasing muscle activation and muscle swelling. Most previous studies used the KAATSU device; however, little long‐term research has been completed using pBFR.</p> </sec> <sec id="cpf12099-sec-0002" sec-type="section"> <title>Objective</title> <p>To investigate the effects of pBFR on muscle hypertrophy.</p> </sec> <sec id="cpf12099-sec-0003" sec-type="section"> <title>Methods</title> <p>Twenty college‐aged male participants with a minimum of 1 year of resistance training experience were recruited for this study. Our study consisted of a randomized, crossover protocol consisting of individuals either using pBFR for the elbow flexors during the first 4 weeks (BFR‐HI) or the second 4 weeks (HI‐BFR) of an 8‐week resistance training programme. Direct ultrasound‐determined bicep muscle thickness was assessed collectively at baseline and at the end of weeks 4 and 8.</p> </sec> <sec id="cpf12099-sec-0004" sec-type="section"> <title>Results</title> <p>There were no differences in muscle thickness between groups at baseline (<italic>P</italic> = 0·52). There were time (<italic>P</italic><0·01, ES = 0·99) but no condition by time effects (<italic>P</italic> = 0·58, ES = 0·80) for muscle thickness in which the combined values of both groups increased on average from week 0 (3·66 ± 0·06) to week 4 (3·95 ± 0·05) to week 8 (4·11 ± 0·07). However, both the BFR‐HI and HI‐BFR increased significantly from baseline to week 4 (6·9% and 8·6%, <italic>P</italic><0·01) and from weeks 4 to 8 (4·1%, 4·0%, <italic>P</italic><0·01), respectively.</p> </sec> <sec id="cpf12099-sec-0005" sec-type="section"> <title>Conclusion</title> <p>The results of this study suggest that pBFR can stimulate muscle hypertrophy to the same degree to that of high‐intensity resistance training.</p> </sec> </abstract>