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1

Physical Education School, Federal University of Rio Grande do Sul, Brazil, Felizardo Street, 750—Jardim Botânico, Porto Alegre-RS 90690-200, Brazil

2

Department of Kinesiology, KHS 233 800 N. State College Blvd., California State University, Fullerton 92831, CA, USA



These authors contributed equally to this work.





*

Author to whom correspondence should be addressed.



Academic Editor: Eling de Bruin

Abstract Although side-to-side asymmetry of the shoulder rotators calculated by independent peak torque IPT has been used for interpretation of injury risks in athletes, it may not measure strength through the entire range of motion ROM tested. The aim of this study was to compare side-to-side asymmetry of the shoulder rotators between independent peak torque IPT and ten-degree angle specific torque AST. Twenty healthy adult males 24.65 ± 2.4 years performed concentric and eccentric internal rotation IR and external rotation ER of the preferred and non-preferred arms on an isokinetic dynamometer at 60°-s through 150° of total ROM. The total ROM was divided into 14 ten-degree angles of the physiological ROM from −90° of ER to 60° of IR. Concentric and eccentric IR IPT 10.5% ± 8.7% and 12.1% ± 7.2% and ER IPT 13.6% ± 9.8% and 8.7% ± 5.6% were significantly less than AST at several angles p < 0.05. IPT might lead to erroneous interpretations of side-to-side asymmetry in the shoulder rotators and does not represent the entire ROM tested. This information could be used to prescribe strength exercises to enhance overhead performance and reduce risk of shoulder injuries. View Full-Text

Keywords: angle specific torque; independent peak torque; strength imbalance; injury prevention; performance enhancement angle specific torque; independent peak torque; strength imbalance; injury prevention; performance enhancement





Autor: Cassio V. Ruas 1,* , Ronei S. Pinto 1,†, Eduardo L. Cadore 1,† and Lee E. Brown 2

Fuente: http://mdpi.com/



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