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- Title
Effects of low-intensity pulsed ultrasound on muscle thickness and echo intensity of the elbow flexors following exercise-induced muscle damage.
- Authors
Medeiros, Diulian; Mantovani, Rodrigo; Lima, Cláudia
- 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/cm, 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.
- Subjects
ULTRASONIC imaging; EXERCISE intensity; DYNAMOMETER; MUSCLE physiology; PLACEBOS; EXPERIMENTAL groups
- Publication
Sport Sciences for Health, 2017, Vol 13, Issue 2, p365
- ISSN
1824-7490
- Publication type
Article
- DOI
10.1007/s11332-017-0366-5