Relationships between resting blood flow and the indices of muscle damage after eccentric contractions

• Published in: European journal of applied physiology 2020-10, Vol.120 (10), p.2183-2192
• Main Authors: Maeda, Hisashi, Saito, Mitsuru, Ishida, Koji, Akima, Hiroshi
• Format: Article
• Language: English
• Subjects: Biomedical and Life Sciences; Biomedicine; Blood flow; Blood pressure; Elbow; Forearm; Heart rate; Human Physiology; Inflammation; Massage; Multiple regression analysis; Muscle contraction; Occupational Medicine/Industrial Medicine; Original Article; Sports Medicine
• ISSN: 1439-6319; 1439-6327
• DOI: 10.1007/s00421-020-04442-1

Purpose The aim of the study is to examine the relationships between increments in resting blood flow and isometric maximal voluntary contraction (MVC) force reduction, muscle soreness, and swelling after eccentric contractions (ECs). Methods Twenty-one young healthy men (age 20.8 ± 1.6 years; height 172.0 ± 5.3 cm; weight 64.9 ± 7.7 kg) were recruited for this study. All participants performed right arm ECs in five sets of 20 repetitions with 3 min of rest between the sets. The dumbbell weight corresponded to 60% MVC force of isometric contraction of elbow flexors with 90° elbow joint angle. Resting forearm blood flow (FBF), the MVC force, the muscle thickness (MT), and muscle soreness of elbow flexors, heart rate (HR), and blood pressure (BP) of brachial artery were measured before, 24 and 48 h after ECs. Results Average and peak resting FBF after ECs significantly changed from the average values before ECs (21% and 39% increase, respectively, P