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Adv Exp Med Biol. 2019;1155:407-414. doi: 10.1007/978-981-13-8023-5_38.

Effects of Taurine Supplementation on Vascular Endothelial Function at Rest and After Resistance Exercise.

Author information

1
Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.
2
Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan.
3
Japan Institute of Sports Science, Tokyo, Japan.
4
Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan. maeda.seiji.gn@u.tsukuba.ac.jp.

Abstract

High-intensity resistance exercise has been shown to increase arterial stiffness and reduce vascular endothelial function. Taurine supplementation has a favorable effect on maintaining vascular function. We had previously reported that taurine supplementation attenuated increases in resistance exercise-induced arterial stiffness. In the present study, we further investigate the effects of taurine supplementation on vascular endothelial function at rest and after resistance exercise.Twenty-nine healthy men were recruited and randomly assigned to either the placebo supplement group (n = 14) or the taurine supplement group (n = 15) in a double-blinded manner. Subjects were required to ingest 6 g of either a placebo or the taurine supplement for 2 weeks prior to and 3 days following the exercise. Two weeks after the commencement of supplementation, the subjects were asked to perform 2 sets of 20 repetitive unilateral maximal-effort resistance exercise of the elbow flexors on a Biodex isokinetic dynamometer, with each contraction lasting 3 s, with 1 repetition performed every 9 s and 4 min rest in between sets. We evaluated the changes in brachial artery flow-mediated dilation (FMD) in the non-exercised arm as an index of vascular endothelial function. Relative and absolute FMDs were measured prior to supplementation, before exercise, and 24, 48, and 96 h after exercise.Two weeks of taurine supplementation significantly increased both relative and absolute FMDs. Baseline diameter significantly increased at 96 h following the exercise in both groups. However, there was no change in the peak diameter. Consequently, both relative and absolute FMDs were significantly reduced at 96 h after the exercise in both groups. Taurine supplementation does not affect resistance exercise-induced reduction in FMD.Two weeks of taurine supplementation (6 g/day) significantly increased vascular endothelial function at rest; however, taurine supplementation did not improve resistance exercise-induced reduction in FMD.

KEYWORDS:

FMD; Resistance exercise; Vascular endothelial function

PMID:
31468418
DOI:
10.1007/978-981-13-8023-5_38
[Indexed for MEDLINE]

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