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COMPARISON OF EMG ACTIVITIES OF KNEE EXTENSOR MUSCLES BETWEEN SOCCER PLAYERS AND SPRINTERS DURING COUNTERMOVEMENT JUMP PERFORMANCE

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Author(s): Kutlu AYDIN | Kerim SÖZBİR | Ümid KARLI | Bekir YÜKTAŞIR | Hasan Birol YALÇIN | Nebil YILDIZ | Raziye Gül TİRYAKİ | SÖNMEZ

Journal: Beden Egitimi ve Spor Bilimleri Dergisi
ISSN 1307-6477

Volume: 5;
Issue: 3;
Start page: 242;
Date: 2011;
Original page

ABSTRACT
Aim: The purpose of this study was to compare electromyogram (EMG) activities of knee extensor muscles (vastus lateralis and vastus medialis) between soccer players and sprinters during countermovement jump (CMJ) performance. Subjects: Fifty three subjects (Thirty two sprinters, ( ) age: 21,91 ± 1,55 yr; body weight: 67,29 ± 8,11 kg; height: 176,81 ± 5,87 cm and twenty one soccer players, ( ) age: 23,.33 ± 1,77yr; body weight: 69,50 ± 7,06kg; height: 174,33 ± 5,65cm) volunteered to participate in this study. Methods: After the standard 5 minutes warm-up period, EMG signals of vastus lateralis (VL) and vastus medialis (VM) were recorded while subjects were performed maximal performance of CMJ. EMG signals were quantified using the root mean square (RMS) value. CMJ test protocol was used to determine the jump performance (jumping height and peak power). Independent t-test was used to determine differences between sprinters and soccer players regarding to jumping height, peak power (PP) and RMS values of VL and VM. Results: The results of the study indicated that the RMS values of sprinters taken from VL (t=3,318; p
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