Hinnekens S, Fickers É, Vervloet G. Effectiveness of the Copenhagen adduction modified position stage 1: EMG measurements and hand-held dynamometer analysis in young and healthy men.
J Bodyw Mov Ther 2024;
39:251-257. [PMID:
38876635 DOI:
10.1016/j.jbmt.2024.02.017]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 01/22/2024] [Accepted: 02/25/2024] [Indexed: 06/16/2024]
Abstract
OBJECTIVES
To verify the effectiveness of the use of a modified position of the Copenhagen Adduction (CA) stage 1 compared to the original position.
DESIGN
Cross-sectional study.
SETTING
Laboratory.
PARTICIPANTS
31 healthy men aged 23.7 ± 1.9 years with no recent or chronic general pathology.
MAIN OUTCOME MEASURES
Differences between EMG amplitudes for the adductor longus (AL), rectus femoris (RF) and semi tendinous (ST) during dynamic contractions and adductor maximal isometric voluntary contraction (MIVC) force values between CA stage 1 standard and modified positions were assessed with either Wilcoxon or paired t-test.
RESULTS
No significant differences were observed for EMG amplitudes of the AL (p-value = 0.724) and for the RF muscle (p-value = 0.337) and for the adductor force (p-value = 0.361) between the two positions. A significant difference was obtained for the ST (p-value<0.001) mainly explained by the adapted position of the non-dominant leg which unlocked the hip joint and generated less muscle activity in the hamstrings.
CONCLUSIONS
Muscle activity of the AL muscle and adductor force being similar in both positions, the CA stage 1 modified position could be of interest for rehabilitation after adductor injury or strengthening of the adductors in elite athletes.
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