To unlock overhead arm mobility, you should test your thoracic spine rotation to identify any movement deficit, then perform a kneeling rotational stretch combined with deep breathing at the end of the range of motion to instantly release the movement.

noli's read

The biomechanical link between the thoracic spine and shoulder range of motion is scientifically sound. An observational study by Kebaetse et al. (1999) shows that thoracic restriction or poor posture directly limits the ability to raise the arms. Furthermore, a randomized controlled trial (RCT) by Joshi et al. (2019) confirms that mobilizing this area produces immediate gains in shoulder mobility. Integrating deep breaths at the end of the movement relies on nervous system regulation to promote muscle relaxation. However, this instant improvement during re-testing is often a transient neurological effect (a temporary tolerance to stretching) rather than a lasting structural change, which requires regular long-term practice. Nevertheless, evaluating the difference between active and passive movement remains an excellent approach validated by expert consensus for personalizing one's exercises.

the sources

1. 1Weppler CH, Magnusson SP 2010
2. 2Behm DG, Blazevich AJ, Kay AD, McHugh M 2015