Acute effect of passive one-legged intermittent static stretching on regional blood flow in young men
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ORIGINAL ARTICLE
Acute effect of passive one‑legged intermittent static stretching on regional blood flow in young men Yosuke Yamato1,2 · Yuya Higaki2 · Shumpei Fujie2 · Natsuki Hasegawa2 · Naoki Horii2,3 · Hiroki Aoyama1 · Yoshihiro Yamashina1 · Shigehiko Ogoh4 · Motoyuki Iemitsu2 Received: 23 April 2020 / Accepted: 3 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose Passive stretching reduces stiffness in the lower limb arteries of the stretched limb. To address this physiological mechanism, we measured the change in shear rate in the posterior tibial artery during a single bout of one-legged passive calf stretching compared with that in the non-stretched leg. Methods The diameter, mean blood velocity, blood flow, and shear rate in the posterior tibial artery were measured using Doppler ultrasound before (baseline), during, and after a one-legged passive intermittent calf stretching procedure (six repetitions of 30-s static stretch with 10-s relaxation) in nine healthy young men. Results In the posterior tibial artery of the stretched leg, the arterial diameter significantly decreased from baseline during the stretching period (baseline vs. stretching period of the 6th set, 0.19 ± 0.01 vs. 0.18 ± 0.01 cm, P
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