TY - JOUR AU - Hartz, Charlini Simoni AU - Pires, Paulo Fernandes AU - Moreno, Marlene Aparecida AU - Bigaton, Delaine Rodrigues PY - 2015/05/11 Y2 - 2024/03/29 TI - EMG frequency spectral characteristics of inspiratory accessory muscles during the shoulder lifting motion in throwing athletes JF - Manual Therapy, Posturology & Rehabilitation Journal JA - mtprehabjournal VL - 0 IS - 0 SE - Research articles DO - 10.17784/mtprehabJournal.2015.13.232 UR - https://submission-mtprehabjournal.com/revista/article/view/1088 SP - 1-5 AB - <p>Background: Dysfunctions related to the shoulder joint are very common in throwing athletes, due to the overhead generated in<br>repetitive movements with your arms above your head. In addition, in handball, the movements are of high intensity, which generates<br>a large metabolic demand and high ventilatory demands. Studies show that highest work of the respiratory muscles, coupled with<br>high mechanical requirement in the upper limbs, generates a dual requirement under the inspiratory muscles in these athletes,<br>leading to limitations related to muscle fatigue. Objective: The objective of this study was to evaluate the EMG frequency spectral<br>characteristics (fatigue index) to accessory muscles of inspiration, through the induction of shoulder elevation movement in handball<br>athletes. Method/Design: The sample consisted of 25 male athletes with an average age of 20 years. Fatigue index was measured by<br>surface electromyography (mean and median frequency - Hz), in which the volunteers performed isometric movement of elevation<br>of the shoulders, and after collection, the data were processed off-line on Matlab R2014a software. For statistical analysis used the<br>Shapiro-Wilk test to test the normality of the data, followed by the comparison of data through the Student t test for independent samples.<br>Significant difference was considered for p value &lt;0.05. Results: The results showed a significant difference between the mean and<br>median frequency values for the sternocleidomastoid muscle right compared to the left sternocleidomastoid muscle. Conclusions: We<br>conclude that during isometric movement of shoulder elevation, there was asymmetry in the frequency spectral characteristics of only<br>one accessory muscles of inspiration, presenting asymmetry, and greater fatigue in the sternocleidomastoid muscle dominant side in<br>relation to the non-dominant side.</p> ER -