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Biomechanical analysis of the shoulder of swimmers after a maximal effort test

Biomechanical analysis of the shoulder of swimmers after a maximal effort test
Biomechanical analysis of the shoulder of swimmers after a maximal effort test

Objectives: to compare the kinematics and the Electromyography of the periscapular muscles in swimmers before and after a 3-min maximal effort test.

Participants: 16 competitive swimmers.Main outcome measurements: infrared cameras were used to record kinematics in the scapular plane in synchronization with the electromyography system.

Results: there was an increase in internal rotation in all angles (p < 0.05), an increase of the anterior tilt, with 120° of elevation (p = 0.04). The serratus anterior showed a decrease in the intervals of 120-90° and 60-30° (p = 0.04; p = 0.02). There was a linear relation between the variation before and after the maximal effort of the anterior tilt in relation to the variation of muscular activation of the transverse trapezius (p = 0.01) and the lower trapezius (42%, p = 0.01); an internal rotation in 120° and 90° of elevation in relation to the transverse trapezius (p = 0.01); and an internal rotation in 60° and 30° of elevation in relation to the serratus anterior (p = 0.04, p = 0.03).

Conclusion: maximal 3-min effort test resulted in altered scapular biomechanics. More studies are needed to verify if the changes correspond to a risk factor for injuries.

14-21
Serenza, Felipe S.
70181e2b-dd45-421d-b5df-0d3aa6c1539d
Oliveira, Anamaria S.
120969ec-6e46-4616-8b6d-4a8c2ce5c735
Bedo, Bruno L.
16800af0-ab04-4935-90ac-e29f4b4a8be2
Mariano, Fabio P.
ec66ac36-8b2c-42ca-8086-390f063f1098
Aquino, Rodrigo
69e0d176-aba8-4a75-b06f-f404aa307053
Warner, Martin
f4dce73d-fb87-4f71-a3f0-078123aa040c
Santiago, Paulo R.P.
53e8fb1d-edfe-494a-ade6-4a1626f60d87
Serenza, Felipe S.
70181e2b-dd45-421d-b5df-0d3aa6c1539d
Oliveira, Anamaria S.
120969ec-6e46-4616-8b6d-4a8c2ce5c735
Bedo, Bruno L.
16800af0-ab04-4935-90ac-e29f4b4a8be2
Mariano, Fabio P.
ec66ac36-8b2c-42ca-8086-390f063f1098
Aquino, Rodrigo
69e0d176-aba8-4a75-b06f-f404aa307053
Warner, Martin
f4dce73d-fb87-4f71-a3f0-078123aa040c
Santiago, Paulo R.P.
53e8fb1d-edfe-494a-ade6-4a1626f60d87

Serenza, Felipe S., Oliveira, Anamaria S., Bedo, Bruno L., Mariano, Fabio P., Aquino, Rodrigo, Warner, Martin and Santiago, Paulo R.P. (2018) Biomechanical analysis of the shoulder of swimmers after a maximal effort test. Physical Therapy in Sport, 30, 14-21. (doi:10.1016/j.ptsp.2017.11.002).

Record type: Article

Abstract

Objectives: to compare the kinematics and the Electromyography of the periscapular muscles in swimmers before and after a 3-min maximal effort test.

Participants: 16 competitive swimmers.Main outcome measurements: infrared cameras were used to record kinematics in the scapular plane in synchronization with the electromyography system.

Results: there was an increase in internal rotation in all angles (p < 0.05), an increase of the anterior tilt, with 120° of elevation (p = 0.04). The serratus anterior showed a decrease in the intervals of 120-90° and 60-30° (p = 0.04; p = 0.02). There was a linear relation between the variation before and after the maximal effort of the anterior tilt in relation to the variation of muscular activation of the transverse trapezius (p = 0.01) and the lower trapezius (42%, p = 0.01); an internal rotation in 120° and 90° of elevation in relation to the transverse trapezius (p = 0.01); and an internal rotation in 60° and 30° of elevation in relation to the serratus anterior (p = 0.04, p = 0.03).

Conclusion: maximal 3-min effort test resulted in altered scapular biomechanics. More studies are needed to verify if the changes correspond to a risk factor for injuries.

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Biomechanical analysis of the shoulder of swimmers after a maximal effort test - Accepted Manuscript
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More information

Accepted/In Press date: 3 November 2017
e-pub ahead of print date: 6 November 2017
Published date: March 2018

Identifiers

Local EPrints ID: 415435
URI: http://eprints.soton.ac.uk/id/eprint/415435
PURE UUID: 08c3fb5b-463f-4558-872c-b047576ee643
ORCID for Martin Warner: ORCID iD orcid.org/0000-0002-1483-0561

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Date deposited: 10 Nov 2017 17:30
Last modified: 07 Oct 2020 05:40

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