Preprint Article Version 1 This version is not peer-reviewed

Clinical Methods to Assess and Profile Shoulder Strength in Competitive Surfers

Version 1 : Received: 3 May 2018 / Approved: 3 May 2018 / Online: 3 May 2018 (13:04:08 CEST)

A peer-reviewed article of this Preprint also exists.

Furness, J.; Schram, B.; Cottman-Fields, T.; Solia, B.; Secomb, J. Profiling Shoulder Strength in Competitive Surfers. Sports 2018, 6, 52. Furness, J.; Schram, B.; Cottman-Fields, T.; Solia, B.; Secomb, J. Profiling Shoulder Strength in Competitive Surfers. Sports 2018, 6, 52.

Journal reference: Sports 2018, 6, 52
DOI: 10.3390/sports6020052

Abstract

The shoulder region has the highest incidence of acute injuries in the sport of surfing. Little is known about the strength profile at the shoulder in a surfing cohort. The primary aim of this study was to establish the reliability of a rotator cuff strength testing procedure for surfers with a secondary aim of providing a profile of internal (IR) and external rotation (ER) strength in a competitive surfing cohort. Shoulder IR and ER isometric strength was measured using a hand-held dynamometer in 13 competitive surfers. Intra-class coefficient values ranged from 0.97 to 0.98 for intra rater reliability and were lower for inter rater reliability ranging from 0.80 to 0.91. Normalised force (N/Kg) for IR strength was significantly greater than ER strength bilaterally (dominant, p= 0.007, non-dominant, p<0.001). No significant differences (p< 0.79) were found in IR strength (N/Kg) between the dominant and non-dominant arms. ER strength (N/Kg) was significantly weaker on the non-dominant arm compared with the dominant arm (p<0.02). The non-dominant arm ER to IR ratio (0.82 ± 0.15) was significantly (p=0.025) lower than the dominant (0.88 ± 0.14) The current procedure is reliable with the same clinician, results indicate musculature asymmetry specific to the external rotators.

Subject Areas

surfing; rotator cuff; shoulder; strength ratio; profiling; assessment

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