alexa Microvascular Perfusion Changes in the Contralateral Gastrocnemius Following Unilateral Eccentric Exercise | OMICS International | Abstract
ISSN: 2165-7025

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Research Article

Microvascular Perfusion Changes in the Contralateral Gastrocnemius Following Unilateral Eccentric Exercise

Noelle M Selkow1, Daniel C Herman2, Zhenqi Liu3, Jay Hertel3, Joseph M Hart3 and Susan A Saliba3
1School of Kinesiology and Recreation, Illinois State University, USA
2Primary Care Sports Medicine Fellow, University of Florida, USA
3University of Virginia, USA
Corresponding Author : Noelle M Selkow
Assistant Professor
School of Kinesiology and Recreation
Illinois State University, Campus Box 5120
Normal, Il 61761, USA
Tel: 309-438-1875
Fax: 309-438-5559
E-mail: [email protected]
Received May 16, 2013; Accepted June 26, 2013; Published June 28, 2013
Citation: Selkow NM, Herman DC, Liu Z, Hertel J, Hart JM, et al. (2013) Microvascular Perfusion Changes in the Contralateral Gastrocnemius Following Unilateral Eccentric Exercise. J Nov Physiother 3:163. doi: 10.4172/2165-7025.1000163
Copyright: © 2013 Selkow NM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Context: Eccentric exercise increases local blood flow and volume as a result of increased metabolic demand. It is not known how eccentric exercise affects microvascular perfusion in the musculature of the opposite limb over this 48 hour period.

Objective: To quantify microvascular perfusion immediately after eccentric exercise to the gastrocnemius in the opposite limb and over 48 hours following the exercise.

Design: Descriptive laboratory study. Setting: Laboratory.

Patients or Other Participants: Six healthy participants volunteered (1M, 5F; Age: 22.4 ± 2.1 years; Height: 165.2 ± 16.6 cm; Weight: 64.5 ± 25.1 Kg).

Intervention(s): A unilateral, eccentric exercise was performed to a randomized leg. Each subject performed 100 calf-lowering repetitions in the sequence of 50 repetitions, 5 min rest and 50 repetitions.

Main outcome measure: Micro vascular perfusion measurements (blood volume (dB), blood flow (dB/sec), and blood flow velocity (1/sec)) of the contralateral gastrocnemius were taken using contrast-enhanced ultrasound (CEU) at baseline, immediately after exercise, and 48 hours after exercise. Pain using a visual analog scale was also recorded baseline, 24, and 48 hours after exercise to determine the onset of delayed onset muscle soreness (DOMS).

Results: There was a significant increase in blood volume immediately after exercise (9.77 ± 3.19 dB) from baseline (6.18 ± 2.05 dB) (p=.023). There was a significant increase in blood flow immediately after exercise (3.53 ± 0.86 dB/sec) from baseline (2.40 ± 0.69 dB/sec) (p=.010). There was no change in blood flow velocity (p=0.487). Blood flow (p=0.003) and volume (p=0.002) remained significantly higher at 48 hours from baseline, with no change in blood flow velocity (p=0.316). Pain significantly increased.

Conclusion: Micro vascular perfusion increased immediately after exercise in the contralateral gastrocnemius. This increase was maintained following a single bout of eccentric exercise over a 48 hour period in the presence of DOMS.

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