Premium
Forearm muscle blood flow following eccentric exercise
Author(s) -
Stacy Mitchel R,
Lawrence Jennifer L,
McGlinchy Sarah A,
Schick Evan E,
Gochioco Monica K,
Scheuermann Barry W
Publication year - 2011
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.25.1_supplement.1108.10
Subject(s) - isometric exercise , medicine , biceps , eccentric , forearm , blood flow , cardiology , eccentric exercise , brachial artery , physical exercise , delayed onset muscle soreness , muscle damage , anatomy , blood pressure , physics , quantum mechanics
Exercise‐induced muscle injury is associated with performing exercise that involves eccentric contractions. Although the effects of eccentric exercise on muscle injury are well known, previous studies investigating muscle blood flow following eccentric exercise have revealed conflicting results. The purpose of this study was to examine forearm muscle blood flow (FBF) during submaximal handgrip exercise following eccentric exercise of the elbow flexors. Seven healthy male subjects (27.9 ± 3.7 yrs; ± SD) performed two bouts (5 min) of dynamic handgrip exercise at 10% of maximal handgrip strength before and 48 hrs following damaging exercise (2 × 25 maximal eccentric contractions). Mean blood velocities (MBV) were measured continuously in the brachial artery using Doppler ultrasound. FBF was calculated using arterial diameters obtained at rest (Pre; 4.06 ± 0.34 mm: Post; 4.21 ± 0.30 mm, p>0.05). Despite a significant decrease (p<0.05) in maximal biceps brachii isometric strength from pre‐ (16.9 ± 3.6 kg) to post‐injury (12.9 ± 4.6 kg), there was no difference in FBF at rest (Pre; 15.7 ± 4.1 ml/min: Post; 18.4 ± 5.4 ml/min) or at end exercise (Pre; 144.9 ± 34.7 ml/min: Post; 158.3 ± 28.4 ml/min) between conditions. It is concluded that muscle injury does not alter FBF during submaximal handgrip exercise suggesting that mediators involved in muscle injury and repair do not contribute to the regulation of muscle blood flow.