Erschienen in:
13.05.2017 | Original Article
Effects of low-intensity pulsed ultrasound on muscle thickness and echo intensity of the elbow flexors following exercise-induced muscle damage
verfasst von:
Diulian Muniz Medeiros, Rodrigo Freitas Mantovani, Cláudia Silveira Lima
Erschienen in:
Sport Sciences for Health
|
Ausgabe 2/2017
Einloggen, um Zugang zu erhalten
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.