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Profiling Shoulder Strength in Competitive Surfers.

James Furness^1,2, Ben Schram^3,4, Tim Cottman-Fields⁵

¹Water Based Research Unit, Bond Institute of Health & Sport, Bond University, Gold Coast, QLD 4226, Australia. jfurness@bond.edu.au.

Sports (Basel, Switzerland)

|June 19, 2018

Summary

This summary is machine-generated.

This study found a reliable method for testing rotator cuff strength in surfers. Competitive surfers showed greater internal than external rotation strength, with notable differences in the non-dominant arm's external rotators.

Keywords:

assessment profiling rotator cuff shoulder strength ratio surfing

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Area of Science:

Sports Medicine
Biomechanics
Orthopedics

Background:

The shoulder is highly susceptible to acute injuries in surfing.
Limited data exists on shoulder strength profiles within the surfing population.

Purpose of the Study:

To determine the reliability of a rotator cuff strength testing protocol for surfers.
To establish a strength profile for internal and external rotation in competitive surfers.

Main Methods:

Isometric shoulder internal and external rotation strength was measured using a hand-held dynamometer.
Thirteen competitive surfers participated in the study.
Intra-rater and inter-rater reliability of the testing procedure was assessed.

Main Results:

The testing procedure demonstrated high intra-rater reliability (ICC 0.97–0.98) and good inter-rater reliability (ICC 0.80–0.91).
Internal rotation strength exceeded external rotation strength bilaterally.
External rotation strength was significantly weaker in the non-dominant arm compared to the dominant arm, resulting in a lower external to internal rotation ratio.

Conclusions:

The rotator cuff strength testing procedure is reliable for use with the same clinician.
Competitive surfers exhibit specific muscular asymmetries, particularly in external rotator strength between dominant and non-dominant arms.