Rhomboid Manual Muscle Test

Learn how to detect rhomboid muscle weakness by conducting the Rhomboid Manual Muscle Test.

By Nate Lacson on Aug 2, 2025.

Fact Checked by Ericka Pingol.

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What are rhomboid muscles?

The rhomboids consist of two muscles in the upper back, the rhomboid major and rhomboid minor, which play a crucial role in stabilizing and moving the shoulder blades. These muscles are situated between the shoulder blades and the spine, beneath the trapezius. They work closely with other major muscles such as the latissimus dorsi, serratus anterior, and levator scapulae, supporting shoulder movement and stability.

The rhomboids are responsible for retracting and elevating the scapula (shoulder blades), facilitating movements like pulling, rowing, and maintaining good posture. When functioning correctly, they help position the scapula for arm movements by interacting with the distal humerus, ensuring smooth upper-body motion.

Just like any muscle, the rhomboids can become strained, leading to discomfort or weakness. Injuries to these muscles can result in various problems, such as pain in the upper back, poor posture, shoulder instability, and a higher risk of injuries like scapular dyskinesis, which can cause shoulder impingement and rotator cuff issues.

Rhomboid manual muscle testing, also known as the rhomboid strength test or rhomboid weakness test, helps healthcare professionals evaluate the strength and function of these muscles, ensuring they are working as they should in supporting the scapula and upper back.

Rhomboid Manual Muscle Test Template

Rhomboid Manual Muscle Test PDF Template

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How to use our Rhomboid Manual Muscle Test template

Our Rhomboid Manual Muscle Test template provides step-by-step guidance on how to conduct the test, with fields for recording observations and results, as well as images to help guide the examiner in performing the test accurately.

Step 1: Access the template

Click the “Use template” button to access the customizable template within the Carepatron app. You can modify and share the template or print it directly. Alternatively, you can use the “Download” button to save a non-customizable but fillable and printable PDF version.

Step 2: Assess the patient

Have the patient lay face down on an examination table, and position yourself next to the arm you’re testing. Instruct the patient to place their hand behind their back with the palm facing up near the buttocks. Use one hand to palpate the scapula's medial border and apply gentle resistance to the shoulder while instructing the patient to raise their hand.

Step 3: Record the results

Use the template to document whether the medial border of the scapula moves under palpation. If it does not move, it indicates a positive result, meaning possible rhomboid weakness. If the palpating finger is pushed away, it indicates normal strength.

Step 4: Discuss the results with the patient

Explain the results of the test to the patient, focusing on how it affects their condition. Discuss how weak or normal rhomboid muscles may influence their posture, movements, and overall condition. Also, teach the patient how to improve or maintain their muscle strength based on the findings.

In some cases, healthcare and fitness professionals may use the MRC strength scale, which measures muscle response from gravity up to maximum resistance, providing a more detailed assessment of the patient’s muscle strength.

When is it best to conduct the Rhomboid Manual Muscle Test?

The Rhomboid Manual Muscle Test is useful for evaluating rhomboid muscle function in various clinical and rehabilitative settings. It can be conducted in the following scenarios:

Shoulder or upper back discomfort and pain

As mentioned earlier, the Rhomboid Manual Muscle Test is one possible test you can offer to conduct when a patient discusses shoulder or upper back pain and discomfort during an appointment with you. If they agree to go through this test, you can do so. It's best to explain what it's for and how it can help determine the problem causing the pain, discomfort, and perhaps weakness in the upper back and shoulders.

Rehabilitation or physical therapy sessions

Suppose a patient was confirmed to have weak rhomboid muscles during the initial testing and diagnosis, and they're currently undergoing rehab to regain strength in their rhomboids. You can routinely conduct this test during rehabilitation or physical therapy sessions to see if their rhomboids are regaining strength.

Assessing athletes

Coaches and trainers can employ physical examination techniques to assess their players. They can conduct this test as part of an overall athlete assessment to see if the athlete being assessed is in tip-top shape and condition. If the test results show otherwise, they can adjust the training plan to ensure they reach peak conditioning to take on competition and more difficult types of training.

If you're looking for a similar resource, make sure to check our Muscle Test Template.

What are the benefits of conducting the Rhomboid Manual Muscle Test?

The Rhomboid Manual Muscle Test offers several key benefits for healthcare professionals when assessing muscle strength and function in patients. It provides valuable insights into the state of the rhomboid muscles, which play a crucial role in shoulder and upper back mobility and stability.

It is a reliable diagnostic test

The Rhomboid Manual Muscle Test can help diagnose weakness of the rhomboid muscles and subscapular muscle tears or lesions! While it can't diagnose these on its own, it can at least confirm the possibility of these problems, which can set the stage for the next series of tests to confirm the cause of upper back and shoulder pains and discomfort.

It can help specialists determine what they can do for the patient

Speaking of setting the stage for the subsequent tests, the Rhomboid Manual Muscle Test can help specialists determine what should go into a patient's treatment plan. Based on the Rhomboid Manual Muscle Test results, let's stipulate that the patient has poor rhomboid muscle strength.

Specialists can shape their treatment plans while considering poor muscle strength. They can add specific physical therapy and rehabilitation to the plan to help the patient regain strength in their rhomboid muscles.

It can help monitor patients

The Rhomboid Manual Muscle Test doesn't have to be a one-time, big-time test. It can be conducted repeatedly during a patient's recovery and rehabilitation phase. By monitoring patients, specialists can be updated on the conditioning of the patients' rhomboid muscles. They can determine if their treatment plan is working or not. If it's working, they can maintain the plan they've been following. If not, they can adjust and see if the changes benefit the patient.

Commonly asked questions

The rhomboid manual muscle test is performed with the patient lying face down, where the examiner applies slight force to the shoulder while the patient resists by lifting their hand from the small of their back. This tests the strength and function of the rhomboid muscles.

A rhomboid strain is diagnosed through physical examination, including tests like the rhomboid manual muscle test, alongside patient history of pain or discomfort in the upper back. Imaging, such as MRI, may also be used to confirm the diagnosis.

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The rhomboid muscles stabilize the scapula, retract it toward the spine, and help with movements such as pulling or rowing. They also support good posture by maintaining the position of the shoulder blades.