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Analysis of the neuromuscular activity during adapted swimming with a snorkel.

Keywords: Aquatic Therapy, Snorkel, Surface Electromyography, Shoulder

Introduction and Objectives

Study Design: Cross-sectional, analytical inferential that uses surface electromyography (sEMG) to measure muscle activation cervical-brachial axis of the right shoulder in healthy subjects during front crawl swimming and crawling with and without tube.

Objective: To compare the activation of the muscles of cervical-brachial axis of the right shoulder and synergists in the execution of crawling and crawl tube with and without extrapolation to clinical practice in Therapeutic Physical Activity programs (AFT).

Hypothesis: There are significant differences in terms of cervical-brachial muscle activity of the right shoulder during the performance of crawling and swimming to crawl with and without tube in healthy subjects.

Materials and Methods

Methods and Measures: sEMG was examined by cervical-brachial eight muscles (erector spinae neck, trapezius, supraspinatus, infraspinatus, pectoralis, anterior deltoid, middle deltoid and latissimus dorsi) of the right shoulder of 16 subjects (8 men and 8 women). Each subject was measured 5 complete cycles of swimming to crawling and crawl tube with and without speed 40BMP. Previously, carried out (land) test maximum voluntary contraction (MVC) to normalize, in absolute terms, the percentage of activation in every gesture. Statistical comparisons were made with the nonparametric test Kolgomorov-Smirnov and use test Wilconxon or test TStudent according to normality of the variables. Results

Results: The results of the 8 muscles studied muscle activation during the test was statistically significant for the infraspinatus (p = .020) and erector spinae muscle of the neck (p = .050) in the crawl, and the erector spinae of the neck (p = .020) in front crawl swimming.


Conclusion: By holistic we can say that the implementation of the swim tube produces an average increase in muscle activation of 100 microvolts. When we faced the same muscle in front of the tube placement or not crawling, we see that the infraspinatus muscle and the erector spinae of the neck are the only ones that have statistically significant changes in muscle activation due to the suppression of head movement (erector spinae) and resistance underwater recovery phase (infraspinatus) As the underwater recovery by the application of the tube causes the neck muscles are less active. However, in the act of crawl, faced the same muscle on the use of pipe or did not observe statistically significant changes of the erector spinae of the neck, we can conclude that in the crawl there is an increased activation of that muscle when we apply tube.

In response to the theoretical models used in empirical Aquatic Physical Therapy, we say that for the rehabilitation of cervical-brachial axis work in progress: (1) crawl without tube, (2) crawling tube, (3) crawl tube and (4) crawl without tube.

Castillo R (1), Cuesta A (2)

(1)Patronato Municipal de Deportes. Malaga, Spain

(2)Department of Psychiatry and Physiotherapy, Faculty of Health Sciences, University of Malaga

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Title Annotation:texto en ingles
Author:Castillo, R.; Cuesta, A.
Publication:Anales de Hidrologia Medica
Date:Dec 1, 2012
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