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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
EMG amplitude of the biceps femoris during jumping compared to landing movements
SpringerPlus, Volume 2, No. 1, Article 520, Year 2013
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Description
Hamstrings injury is a common occurrence in athletic performance. These injuries tend to occur during a deceleration or landing task suggesting the negative work may be a key component in hamstrings injury. The purpose of this study was to investigate the muscular activity (EMG) of the biceps femoris (BF) in different phases (concentric vs. eccentric) of a Counter Movement Jump (CMJ), Squat Jump (SJ) and the Braking Phase (BP) of a landing task. Twelve female volleyball players performed 5 CMJs, SJs and BPs while surface EMG was recorded using a MuscleLab (BoscoSystem™, Norway). EMG values were normalized to an maximal voluntary contraction. A repeated measures analysis of variance (ANOVA) was used to compare mean normalized EMG values of the concentric and eccentric portions of the CMJ with the BP and SJ. The ANOVA revealed significantly lower BF activation in the concentric and eccentric portions of the CMJ compared to the BP (64%, p < 0.001) and SJ (7%, p = 0.02), respectively. These findings suggest that the CMJ relies on a greater contribution of elastic tissues during the concentric and eccentric portions of the movement and thus requires less muscle activation of the BF. © 2013 Padulo et al.; licensee Springer.
Authors & Co-Authors
Padulo, Johnny
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Tunisia, Tunis
République Tunisienne Ministère de la Jeunesse, Des Sports et de L'éducation Physique
Italy, Sardinia
Coni Italian National Olympic Committee
Tiloca, Alessandra
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Powell, Douglas William
United States, Buies Creek
Campbell University
Granatelli, Giampietro
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Antonino, Bianco
Italy, Palermo
Università Degli Studi Di Palermo
Paoli, Antonio
Italy, Padua
Università Degli Studi Di Padova
Statistics
Citations: 79
Authors: 6
Affiliations: 6
Identifiers
Doi:
10.1186/2193-1801-2-520
e-ISSN:
21931801
Research Areas
Violence And Injury
Participants Gender
Female