Exercise with blood flow restriction reduces time to task failure, induces more pain, but evokes similar changes in activation and oxygenation as free-flow exercise

Karen Søgaard, Jakob Lindberg Nielsen, Mikkel Iwanoff Kolind, Ying Gao, Fernande Pareja-Blanco, Jeppe G. Phillip, Søren Gam

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Abstract

INTRODUCTION Blood flow restriction is increasingly being used to increase the effiency af training. The objective of the present study is to examine the acute effect of blood flow restriction (BFR) on muscle activation and oxygenation of the vastus medialis (VM) and vastus lateralis (VL) during a single bout of unilateral knee extension (KE). METHODS Seventeen males were enrolled in a within-group randomized cross-over design. Participants performed unilateral KE at 20% of 1-repetition maximum to task failure, using a BFR or a free flow (FF) exercise protocol in randomized order on two separate days. Changes in oxygenation and neuromuscular activation of VL and VM, were monitored continuously using near-infrared spectroscopy (NIRS) and surface electromyography (sEMG), respectively. Pain measures were collected prior and following set completion. Within- and between-group comparisons were performed at multiple time points of set completion for each muscle. RESULTS AND DISCUSSION Subjects performed 43% fewer repetitions during the BFR condition compared to FF (p
Original languageEnglish
Title of host publication11th Annual Meeting of the Danish Society of Biomechanics
Publication date2019
Publication statusPublished - 2019
Event11th Annual meeting of the Danish Society of Biomechanics - SDU, Odense, Denmark
Duration: 15. Nov 201915. Nov 2019
Conference number: 11
http://www.danskbiomekaniskselskab.dk/event?id=11

Conference

Conference11th Annual meeting of the Danish Society of Biomechanics
Number11
LocationSDU
Country/TerritoryDenmark
CityOdense
Period15/11/201915/11/2019
Internet address

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