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Phys Ther Sport. 2014 Feb;15(1):33-8. doi: 10.1016/j.ptsp.2013.02.002. Epub 2013 May 20.

Musculoskeletal screening to detect asymmetry in swimming.

Author information

1
School of Health and Sport Sciences, University of the Sunshine Coast, Queensland, Australia.
2
School of Health and Sport Sciences, University of the Sunshine Coast, Queensland, Australia. Electronic address: bburkett@usc.edu.au.

Abstract

OBJECTIVES:

To investigate the influence of asymmetry of clinical strength musculoskeletal screening measures and 3D kinematic movements on bilateral hand-force performance measures in swimmers.

DESIGN:

Cross-sectional.

SETTING:

Institutional.

PARTICIPANTS:

32 national-ranked junior swimmers, 100 m freestyle time (mean (SD), 60.68 s (4.81)).

MAIN OUTCOME MEASUREMENTS:

Screened clinical strength, kinematic movements, and bilateral hand-force were measured. Asymmetry was defined as a percentage difference greater than 10 percent, either left (negative) or right (positive) for all variables.

RESULTS:

Asymmetry of the clinical strength measures was found in ∼85% of swimmers. Athletes with symmetry of all clinical strength measures displayed symmetrical bilateral hand force production. Approximately 50% of clinically asymmetrical swimmers were able to compensate, due to summated muscle symmetry and/or an altered kinematic movement pattern, and generate symmetrical hand force.

CONCLUSIONS:

Symmetry of clinical strength was directly related to symmetrical force output. It is important to connect the clinical screening results to the sport-specific performance measures to ensure functional and valid screening is undertaken. Clinicians should aim for symmetry of strength in order to minimise the requirement for compensatory strategies.

KEYWORDS:

Asymmetry; Clinical strength; Screening; Swimming

PMID:
23702323
DOI:
10.1016/j.ptsp.2013.02.002
[Indexed for MEDLINE]

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