Exercise can reverse quadriceps sensorimotor dysfunction that is associated with rheumatoid arthritis without...

Area of Science:

• Rheumatology
• Musculoskeletal Rehabilitation
• Clinical Biomechanics

Background:

• Rheumatoid arthritis (RA) frequently impacts lower limb function, leading to quadriceps sensorimotor deficits and disability.
• Understanding these deficits is crucial for developing targeted interventions.

Purpose of the Study:

• To compare sensorimotor function, functional performance, and disability in RA patients versus healthy individuals.
• To evaluate the efficacy and safety of a brief rehabilitation regimen in RA patients with lower limb involvement.

Main Methods:

• Compared quadriceps strength, voluntary activation, proprioceptive acuity, and aggregate functional performance time (AFPT) between 103 RA patients and 25 healthy subjects.
• Assessed disability (Health Assessment Questionnaire), disease activity, and inflammatory cytokines in RA patients.
• Conducted a randomized controlled trial (RCT) of rehabilitation on 93 RA patients, analyzing changes in these variables.

Main Results:

• RA patients demonstrated significantly weaker quadriceps, poorer activation, reduced proprioceptive acuity, and longer AFPT compared to controls.
• Rehabilitation led to significant improvements in quadriceps strength, voluntary activation, AFPT, and reduced subjective disability.
• These improvements were sustained at 6-month follow-up, with no exacerbation of disease activity.

Conclusions:

• Quadriceps sensorimotor deficits are linked to lower limb disability in RA patients.
• A clinically applicable rehabilitation regime effectively enhances sensorimotor function and reduces disability in RA patients with lower limb involvement.
• The described rehabilitation approach is safe and effective for patients with well-controlled RA affecting the lower limbs.