The Claim

Compensatory posterior deltoid activity during shoulder external rotation in individuals with round shoulder posture may disrupt glenohumeral muscle balance and contribute to shoulder dysfunction.

Source: Effect of Real-Time EMG Biofeedback on Selective Activation of the Infraspinatus and Posterior Deltoid During Theraband Shoulder External Rotation Exercise in Individuals with Round Shoulder Posture

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
34score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
1 study reviewed
In plain English

When someone has rounded shoulders, the back part of their shoulder muscle might work too hard when rotating the shoulder outward. This could throw off the normal muscle balance around the shoulder joint and lead to shoulder problems.

See the scientific wording

In individuals with round shoulder posture, compensatory posterior deltoid activity during shoulder external rotation may disrupt glenohumeral muscle balance and contribute to shoulder dysfunction

What the research says

1 study

  1. Study: Effect of Real-Time EMG Biofeedback on Selective Activation of the Infraspinatus and Posterior Deltoid During Theraband Shoulder External Rotation Exercise in Individuals with Round Shoulder Posture

    The study looked at people with rounded shoulders and found that their posterior deltoid muscle works too hard during shoulder rotation exercises, which throws off the muscle balance around the shoulder joint. Using special biofeedback helped them use the right muscles better, supporting the idea that this imbalance could cause shoulder problems.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.