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Analysis of elbow muscle strength parameters in Brazilian jiu-jitsu practitioners.

Authors
  • Follmer, Bruno1
  • Dellagrana, Rodolfo André1
  • de Lima, Luis Antonio Pereira1
  • Herzog, Walter2
  • Diefenthaeler, Fernando1, 2
  • 1 a Biomechanics Laboratory, Centre of Sports , Federal University of Santa Catarina , Florianópolis , Brazil. , (Brazil)
  • 2 b Human Performance Laboratory , University of Calgary , Calgary , Canada. , (Canada)
Type
Published Article
Journal
Journal of Sports Sciences
Publisher
Informa UK (Taylor & Francis)
Publication Date
Dec 01, 2017
Volume
35
Issue
23
Pages
2373–2379
Identifiers
DOI: 10.1080/02640414.2016.1267388
PMID: 27976985
Source
Medline
Keywords
License
Unknown

Abstract

Upper-body dynamic and isometric maximum strength are essential components for success in Brazilian jiu-jitsu (BJJ). This study was aimed at analysing strength parameters in the elbow flexor and extensor muscles of BJJ practitioners. Participants (n = 28) performed maximum isometric contractions of elbow flexors and extensors to determine peak torque (PT), rate of force development (RFD), and the torque-angle (T-A) relationship at elbow angles of 45°, 60°, 75°, 90°, 105°, and 120°. Additionally, concentric and eccentric PTs were measured at 1.04 rad·s-1. Student t-test and ANOVA were performed using α = 0.05. Elbow flexors were stronger isometrically (P < 0.001, ES = 1.23) but weaker concentrically (P < 0.05, ES = 0.54) than extensor muscles, possibly because of the extensive grip disputes and pushing of opponents in BJJ. The T-A relationship had an inverted "U"-shape. Torque differences across elbow angles were moderate (ES = 0.62) for the extensor and large (ES = 0.92) for the flexor muscles. Isometric torque was greatest for elbow angles of 105° and 75° and smallest for 45° and 120° for extensor and flexor muscles, respectively. Elbow flexors had a greater RFD than extensors, regardless of elbow angle. The present study provides comprehensive results for elbow muscle strength in BJJ practitioners.

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