Posterior Shoulder Pain in a Powerlifter: A JANMI Clinical Reasoning Case Study

11 minutes ago

5 min read

Pain at the back of the shoulder deserves local attention. It also invites a wider question: what demands is this shoulder managing, and which assessment findings might help us choose a useful next step?

This adapted clinical case explores posterior shoulder discomfort in an adult recreational powerlifter with regular desk-based work. It illustrates a reasoning process, not a diagnosis from posture or a claim that one region caused another to hurt.

The presentation

The client trained regularly and reported pain at the back of one shoulder, most noticeable during internal rotation and horizontal adduction. Internal rotation turns the upper arm inward; horizontal adduction brings the arm across the body at shoulder level.

Occupation, exact training frequency and other unnecessary personal details have been generalised. The symptomatic side is deliberately unspecified. The illustration is AI-generated and does not depict the client; the highlighted region is illustrative, not a confirmed anatomical pain source.

What the assessment suggested

The supplied case account described increased tension or perceived loading around the infraspinatus and posterior rotator cuff, pectoral region, latissimus dorsi and cervical extensors. A rounded shoulder position and forward-head position were observed, alongside a scapula resting in relatively greater upward rotation.

These findings need different levels of interpretation. The positions and movements were clinical observations. “Overload” was a working interpretation of demand and response, not a direct measurement of tissue load, evidence of damage or a diagnosis established through touch.

The scapular position was an individual finding. A description such as rounded shoulders does not tell us how every scapula must be rotated. Resting position alone also does not establish how the shoulder blade behaves during lifting, whether the position is problematic or whether it contributes to pain.

Why the anatomy matters

The infraspinatus lies on the back of the scapula and contributes to external rotation of the upper arm and rotator-cuff support of the shoulder joint. Pain during internal rotation does not mean that the painful muscle produces internal rotation. A movement can change demands on several structures; its symptom response does not identify one tissue by itself.

Pectoralis major and latissimus dorsi contribute to internal rotation and adduction of the upper arm, with functions that vary with the task. Pectoralis minor acts on the scapula rather than directly rotating the upper arm. These muscles should not be treated as interchangeable simply because they may all be considered during shoulder assessment.

The scapula moves on the thorax as the arm moves. Serratus anterior and the trapezius contribute to its support and movement. Their involvement in an exercise does not prove they were weak, inactive or responsible for this client's symptoms. The aim is to explore useful movement, not to infer a muscle deficit from appearance alone.

The JANMI working hypothesis

The question extended beyond “Which muscle hurts?” to “Why might the posterior shoulder be experiencing more demand than it currently tolerates?”

The working hypothesis considered posterior-cuff demand alongside pectoral and latissimus activity, scapular movement, thoracic movement, the cervical region, training exposure and prolonged desk work. Heavy training can demand substantial shoulder effort. Long periods in similar working positions may offer fewer opportunities to vary movement. Neither fact establishes the cause of this person's pain.

Within JANMI's six-link framework, shoulder/scapula, lumbar/thorax and neck/head were relevant areas to explore. Other regions would warrant assessment only where the history or task suggested a useful reason. The framework is an assessment map, not a rigid causal chain or a requirement to treat the whole body.

Alternative explanations remain important. Posterior shoulder symptoms can have different sources, and relevant joint, tendon, instability or cervical/neurological presentations may require assessment by an appropriately qualified clinician. The pattern described here cannot rule these in or out.

Treatment and movement support

The reported approach combined hands-on work with movement support rather than focusing exclusively on the painful area. Movement work included scapular control, exercises involving serratus anterior and lower trapezius, thoracic mobility and controlled rotator-cuff work where appropriate.

These choices should be selected for the individual's comfortable range, ability and response. An upwardly rotated resting scapula is not automatically an indication for more upward rotation, nor a reason to force the shoulder blade down and back. Exercise selection needs the assessment of movement under relevant conditions, not a standard posture-correction formula.

The purpose was to explore more comfortable movement options and tolerable loading across the shoulder system. It was not to promise anatomical realignment, permanently release a tissue or “switch on” a muscle assumed to be dormant. Hands-on pressure, range and loading should remain agreed and responsive to the client.

Reassessment is part of the reasoning

A useful plan returns to the movements and activities that mattered at the start. Reassessment might compare comfortable internal rotation, reaching across the body, a suitably modified training task and the client's response later that day or the following day.

Training volume, intensity, exercise selection and recovery can be reviewed within the practitioner's competence, with specialist input where needed. Desk-related suggestions can focus on achievable changes of position and movement breaks rather than maintaining one supposedly perfect posture.

This case account does not provide measured follow-up outcomes. We therefore cannot report a recovery percentage, improved range, successful return to lifting or lasting pain relief. Even when a movement feels easier after treatment, that response alone does not prove the working hypothesis or identify which component helped.

What this case teaches

The painful area remains important. Wider assessment can add useful questions without replacing local assessment or medical referral when needed.

Anatomical knowledge helps distinguish what a muscle does from what might provoke symptoms. Individual findings deserve attention even when they differ from an expected postural pattern. Treatment choices remain hypotheses to evaluate through reassessment, not explanations proven by the fact that treatment was delivered.

Treat locally. Reason globally. See the person.

When shoulder symptoms need medical assessment

Seek assessment for persistent weakness, a feeling of instability, painful clicking or catching, significant or persistent night pain, symptoms affecting sleep or daily activities, or symptoms that worsen or fail to improve. Clicking without pain or loss of function is common and does not by itself establish damage.

Seek urgent GP or NHS 111 advice for sudden severe shoulder pain, inability to move the arm, a changed shape or marked swelling, persistent pins and needles, loss of feeling, an unusually hot or cold arm, pain after an injury or accident, or feeling feverish or unwell. New or progressive weakness also warrants prompt clinical assessment. Call 999 for shoulder or arm discomfort accompanied by possible heart-attack symptoms, such as chest pressure, breathlessness or sweating.

JANMI provides soft tissue therapy and movement support within professional competence. We do not diagnose disease or replace medical, physiotherapy or specialist assessment. Do not use this case to self-diagnose or copy exercises without considering your own circumstances.

Privacy and educational disclaimer

Inspired by a real clinical presentation; identifying details have been adapted for privacy. Clinical observations and treatment hypotheses do not establish causation. Educational content only, not medical advice. The conceptual illustration is AI-generated and is not a patient photograph or diagnostic image.