Title

Changes in arterial stiffness after eccentric versus concentric cycling

Document Type

Journal Article

Publication Title

Applied Physiology Nutrition

ISSN

1715-5320

Volume

44

Issue

5

First Page

533

Last Page

538

PubMed ID

30308126

Publisher

NRC Research Press

School

Centre for Exercise and Sports Science Research / School of Medical and Health Sciences

RAS ID

29644

Comments

Originally published as: Okamoto, T., Kobayashi, R., Hashimoto, Y., & Nosaka, K. (2018). Changes in arterial stiffness after eccentric versus concentric cycling. Applied Physiology, Nutrition, and Metabolism, 44(5), 533-538. Original publication available here

Abstract

This study compared changes in brachial-ankle pulse wave velocity (baPWV) after concentric (CON) versus eccentric (ECC) cycling. It was hypothesized that baPWV would increase after the first ECC bout (ECC1) because of muscle damage, but not after the second ECC bout (ECC2), and would decrease after CON. Fifteen young (aged 20–30 years) men performed 2 bouts of 30-min ECC (ECC1 and ECC2) at 60% of maximal CON power output and 2 bouts of 30-min CON at the same intensity as that of ECC (CON1), and at the same oxygen consumption as that of ECC (CON2) every 2 weeks. Oxygen uptake during the cycling was recorded, and baPWV was measured before and at 0.5, 1, 24, and 48 h after each cycling bout. Maximal voluntary contraction (MVC) torque and muscle soreness of the knee extensors were assessed before and at 24 and 48 h after each cycling bout. Changes in these variables over time were compared among the 4 cycling bouts by 2-way repeated-measured ANOVA. baPWV decreased (P < 0.05) 8% from the baseline (1119 ± 116 cm/s) at 0.5 h after CON1 (1028 ± 126 cm/s), but no significant changes were evident after ECC1, ECC2, and CON2. MVC torque decreased 10% from the baseline at 24 h after ECC1, but no significant changes were evident after CON1, CON2, and ECC2. These results did not support the hypothesis, and suggest that minor muscle damage induced by eccentric cycling does not affect arterial stiffness.

DOI

10.1139/apnm-2018-0379

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