Quantitative assessment of glenohumeral translation in professional golfers using ultrasound.
Authors: T Mackenzie, L Herrington, R Hawkes, L Funk
References: J Athl Enhancement 3:2. 2014
Background: Posterior hyperlaxity of the glenohumeral joint could contribute to shoulder problems in golfers.
Objective: Assess within-session intra-rater reliability of using Ultrasound to measure glenohumeral laxity, and quantify glenohumeral joint translation in symptom free elite golfers and non overhead athlete controls.
Study Design: Descriptive laboratory study
Method: Ultrasound Scanning measured humeral head translation during the Drawer test in 30 asymptomatic professional golfers recruited on the PGA European Challenge Tour, and 10, asymptomatic, non overhead sportsmen controls, all male and under the age of 40 years.
Results: Within-session intra-rater reliability coefficients (Intraclass correlation ICC3.1) were moderate to good, with scores of more than 0.75 (95% confidence interval 0.51-0.94) for the technique and instrumentation used. Posterior translation of the humeral head was 1.29mm greater in golfers in the non dominant/lead shoulder compared with controls. This was statistically significant when p = 0.01(Mann-Whitney U test).
Conclusions: Posterior translation of the humeral head was greater in golfers in the non dominant/lead shoulder compared with controls.
Clinical relevance: Posterior hyper laxity of the shoulder joint may underlie shoulder pathologies in overhead sportsmen; therefore, quantifying glenohumeral laxity has implications in sports medicine in injury screening, injury prevention and injury management