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Published in: Sport Sciences for Health 2/2017

01-08-2017 | Original Article

Effects of low-intensity pulsed ultrasound on muscle thickness and echo intensity of the elbow flexors following exercise-induced muscle damage

Authors: Diulian Muniz Medeiros, Rodrigo Freitas Mantovani, Cláudia Silveira Lima

Published in: Sport Sciences for Health | Issue 2/2017

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Abstract

Purpose

The aim of this study was to analyze the effects of pulsed ultrasound on muscle thickness (MT) and echo intensity (EI) after strenuous exercise.

Methods

Forty healthy untrained male were randomized in either experimental group (n = 20) or placebo group (n = 20). Muscle thickness and EI of the dominant elbow flexors were collected at baseline (PRE), immediately post (0 h), 24, 48, 72, and 96 h after the protocol of damage induction. The protocol of damage induction was performed on an isokinetic dynamometer and consisted of four sets of ten repetitions of maximal eccentric and concentric contractions. The experimental group was treated with pulsed ultrasound (1:4, 1 MHz, 0.8 W/cm2, 23 min) at 0, 24, 48, and 72 h following the protocol of damage induction. The placebo group received the same time of application, but the equipment was kept turned off.

Results

The results demonstrated that MT and EI significantly increased at all time points after the exercise (p < 0.05). However, neither MT nor EI showed any significant difference between groups at any moment (p > 0.05).

Conclusion

Pulsed ultrasound is ineffective in enhancing recovery from exercise-induced muscle damage.
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Metadata
Title
Effects of low-intensity pulsed ultrasound on muscle thickness and echo intensity of the elbow flexors following exercise-induced muscle damage
Authors
Diulian Muniz Medeiros
Rodrigo Freitas Mantovani
Cláudia Silveira Lima
Publication date
01-08-2017
Publisher
Springer Milan
Published in
Sport Sciences for Health / Issue 2/2017
Print ISSN: 1824-7490
Electronic ISSN: 1825-1234
DOI
https://doi.org/10.1007/s11332-017-0366-5

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