Shoulder and Knee Pain: Matching Capacity and Load Beyond an Imaging Finding

Key takeaways

• Imaging can describe structure, but it does not by itself define pain severity, function or the right exercise dose.
• Current shoulder and knee guidelines support history, examination, shared goals and progressive rehabilitation; treatment should match the diagnosis and symptom pattern.[1–5]
• A flare after activity is information for dose adjustment, not automatically proof of tissue damage.

Evidence in context

The 2025 APTA rotator cuff tendinopathy guideline and AAOS shoulder guidance emphasise clinical assessment, education and progressive exercise rather than an imaging-only decision.[1,2] For knee osteoarthritis, AAOS, ACR/Arthritis Foundation and OARSI guidance support exercise and other non-surgical options, with choices adapted to comorbidity, goals and response.[3–5]

BAIZE Clinical Interpretation

Assess structural status and red flags; functional capacity such as reaching, stair climbing, squatting and lifting; biological factors including sleep, inflammation and comorbidity; and recovery after exercise. Map mechanical, physiological and psychological load. The BAIZE working hypothesis is that symptoms may reflect a capacity–load mismatch, but this must be checked through functional retesting and symptom trajectory.

FAQ

Does an MRI tear mean I must stop exercising?

Not automatically. The finding must be interpreted with symptoms, strength, function, examination and medical restrictions.

Should a painful shoulder or knee be completely rested?

Complete rest is not a universal solution. A clinician may temporarily modify aggravating load while maintaining safe movement and rebuilding capacity.

How do I know if exercise dose is too high?

Use the task goal, symptom response during activity, later that day and the next day, and function over time. Persistent worsening warrants reassessment.

When should I seek medical assessment?

After major trauma, sudden loss of function, a hot swollen joint, fever, progressive neurological symptoms or unexplained severe night pain.

References

1. APTA. Clinical Practice Guideline for the Management of Rotator Cuff Tendinopathy. 2025. PMID:40165544.
2. AAOS. Management of Rotator Cuff Injuries: Evidence-Based Clinical Practice Guideline. https://www.aaos.org/rotator-cuff-injuries-cpg.
3. AAOS. Management of Osteoarthritis of the Knee (Non-Arthroplasty), 3rd ed. https://www.aaos.org/oak3cpg.
4. Kolasinski SL, et al. 2019 ACR/Arthritis Foundation guideline for osteoarthritis. Arthritis Care Res. 2020;72:149–162. doi:10.1002/acr.24131. PMID:31908149.
5. Bannuru RR, et al. OARSI guidelines for non-surgical management of knee, hip and polyarticular osteoarthritis. Osteoarthritis Cartilage. 2019;27:1578–1589. doi:10.1016/j.joca.2019.06.011. PMID:31278997.

Author & Clinical Review

Written by REPULI Clinical Team

Clinically reviewed by David Konrad Lehr, PT

Master's Degree in Rehabilitation and Healthcare Management

Clinical focus: sports injury rehabilitation, post-operative functional restoration and musculoskeletal rehabilitation

Last evidence search: 2026-08-05

Last updated: 2026-09-01