Defining the glenohumeral range of motion required for overhead shoulder mobility: an observational study.
Linda Dyer, Jaap Swanenburg, Hermann Schwameder and 1 others
PMID 39280075WHAT IT FOUND
To lift the arm overhead, patients needed about 83 degrees of glenohumeral flexion and abduction.
External rotation mattered less, requiring only 53% of the healthy side's range. Pushing for overhead motion with less than this may cause pain without restoring function.
Key findings
01Glenohumeral flexion and abduction cutoffs of 83 degrees were required to predict the ability to achieve overhead mobility (global shoulder flexion above 120 degrees).
02Glenohumeral external rotation was less critical, with 53% of the healthy opposite side's range being the predictive cutoff, as absolute degree values were inconsistent.
03The study recommends caution with overhead stretching in patients with glenohumeral stiffness to avoid inducing pain via compensatory scapular mechanics.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The sample size was small (21 patients), and the group was heterogeneous, including different types of shoulder surgeries which may have different underlying impairments. ROM measurements relied on clinical goniometry and visual estimation, which are less precise than imaging methods, potentially affecting the exactness of the cutoff values. The study did not measure glenohumeral internal rotation, which is part of the full shoulder complex and could influence overhead mechanics. The findings are based on a retrospective analysis of clinical data, not a controlled trial, so they describe associations rather than proving that achieving these ranges causes overhead function.
Declared interests
The authors declared no conflicts of interest, and the research received no specific grant from any funding agency.
The easy way to misread this
Do not interpret the 83-degree cutoff as a guarantee of pain-free overhead movement. These values predict the *ability* to achieve the position, but the study notes that pushing into overhead motion before this mobility is present can cause pain due to compensatory scapular mechanics. The cutoffs are statistical thresholds from a small, mixed-surgery sample, not absolute clinical rules for every patient.