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标题：Supplementation of eicosapentaenoic acid-rich fish oil attenuates muscle stiffness after eccentric contractions of human elbow flexors
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作者：Yosuke Tsuchiya ; Kenichi Yanagimoto ; Hisashi Ueda 等
期刊名称：Journal of the International Society of Sports Nutrition
电子版ISSN：1550-2783
出版年度：2019
卷号：16
期号：1
页码：1-9
DOI：10.1186/s12970-019-0283-x
出版社：BioMed Central
摘要：This study aimed to investigate the effect of supplementation of fish oil rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on the damage of the biceps brachii after eccentric contractions (ECCs) of the elbow flexors, particularly focusing on muscle stiffness. Sixteen men were included in this double-blind, placebo-controlled, parallel design study and the participants were randomly assigned to the EPA and DHA supplement group (EPA, n = 8) and placebo group (PL, n = 8). They consumed either EPA 600 mg and DHA 260 mg per day or placebo supplement for 8 weeks prior to exercise. Moreover, they performed six sets of 10 ECCs at 100% maximal voluntary contraction (MVC) using a dumbbell. Changes in MVC torque, range of motion (ROM), upper arm circumference, muscle soreness, muscle echo intensity, and muscle stiffness were assessed before exercise; immediately after exercise; and 1, 2, and 5 days after exercise. MVC torque and ROM were significantly higher in the EPA group than in the PL group after ECCs (p < 0.05). Muscle soreness, upper arm circumference, and muscle echo intensity were significantly higher in the PL group than in the EPA group after ECCs (p < 0.05). In addition, muscle stiffness at 150° was significantly higher in the PL group than in the EPA group immediately after ECCs (p < 0.05). The present study showed that EPA and DHA supplementation has a positive role in inhibiting muscle stiffness after ECCs. This trial (UMIN000028165) was registered on 10th/July/2017.
关键词：Eicosapentaenoic acid ; Omega-3 polyunsaturated fatty acids ; Shear wave elastography ; Shear elastic modulus ; Muscle function ; Muscle swelling ; Muscle soreness ; Echo intensity