Vibration-Enhanced Suspension Training for Glenohumeral Stability and Strength after Shoulder Subluxation: A Case Series.
Javier Biel-Costa, Javier Peña, Jordi Vicens-Bordas and 4 others
PMID 40469649WHAT IT FOUND
Two athletes with prior shoulder subluxations added vibration to suspension training.
They showed large gains in internal rotation and isometric strength, but no improvement in dynamic bench press velocity or estimated one-rep max.
Key findings
01Internal rotation range of motion improved by roughly 50%, while flexion improved by only about 5%.
02Isometric push and pull strength in the injured arm increased by around 10%, but dynamic strength measures did not improve.
03Estimated one-rep max values for the bench press remained unchanged or slightly decreased after the seven-week intervention.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study included only two subjects, making it impossible to generalize the findings to other patients. The two subjects had different injury histories and prior treatments, so the specific effect of vibration cannot be isolated from other factors. The intervention lasted only seven weeks, so long-term effects are unknown. There was no control group, so it is unclear if traditional suspension training alone would have produced similar results.
Declared interests
Three authors have submitted a patent application for the specialized vibration device used in the study. The device is not currently commercialized.
The easy way to misread this
Do not assume vibration is the cause of the improvements. With only two subjects and no control group, the gains in stability and range of motion could have resulted from any suspension training or natural recovery.