Weight-Bearing Exercise Should NOT Be Discouraged in Psoriatic Arthritis
Exercise, including weight-bearing activities, is actively recommended for patients with psoriatic arthritis and does not accelerate joint damage. The 2018 ACR/NPF guidelines explicitly recommend exercise over no exercise for all patients with active PsA 1, 2.
Evidence-Based Recommendations
Exercise is Beneficial, Not Harmful
The authoritative ACR/NPF guideline makes clear that:
- Exercise is conditionally recommended over no exercise for all patients with active PsA (based on low-quality evidence) 1
- While low-impact exercise (tai chi, yoga, swimming) is preferred over high-impact exercise (running), high-impact exercises may be performed by patients who prefer them and have no contraindications 1
- The only exceptions where exercise should be avoided are patients with existing muscle/tendon injury or multiple inflamed symptomatic joints with worsening pain during exercise 1
Recent Research Confirms Safety
Multiple recent studies directly contradict the concern about joint damage:
- A 2023 randomized controlled trial of high-intensity interval training (HIIT) in PsA patients showed no evidence of increased inflammation on ultrasound or MRI after 11 weeks 3
- A 2023 study of badminton training (moderate biomechanical stress) found the activity was well tolerated without increases in tenderness, pain, or ultrasound-proven inflammation 4
- A 2018 resistance training trial demonstrated improved functional capacity and disease activity without adverse events 5
- A 2021 systematic review concluded that beneficial effects of exercise outweigh the risk of enthesitis, with recent trials mentioning no adverse events 6
Clinical Algorithm for Exercise Prescription
Step 1: Assess Current Disease Status
- Stable disease without progressive joint damage: Proceed with progressive exercise program
- Active flare with multiple inflamed joints causing pain with movement: Temporarily modify or reduce intensity until inflammation controlled
- Existing muscle/tendon injury: Avoid exercises stressing injured area until healed
Step 2: Choose Exercise Type Based on Patient Factors
- Preferred approach: Start with low-impact activities (swimming, cycling, tai chi, yoga)
- Patient preference for high-impact: Running and other high-impact activities are acceptable if patient prefers and has no contraindications 1
- Include resistance training: Shown to improve functional capacity and disease activity 5
Step 3: Monitor Response
- Exercise should be tolerable and not cause sustained worsening of joint pain
- Temporary mild discomfort during activity is acceptable
- If pain worsens significantly or persists beyond the exercise session, reduce intensity or modify activity
Additional Context from EULAR Guidelines
The 2018 EULAR recommendations for physical activity in inflammatory arthritis support that patients with stable disease can safely perform a variety of progressive aerobic or resistance-training activities 7. The general public health recommendations for physical activity are applicable to most PsA patients.
Common Pitfalls to Avoid
Do not perpetuate the myth that exercise damages joints in PsA. This outdated concern:
- Leads to unnecessary sedentary behavior
- Worsens cardiovascular comorbidities (already elevated in PsA)
- Contributes to obesity (present in nearly 50% of PsA patients), which itself worsens disease activity and treatment response 8
- Creates a vicious cycle of inactivity → weight gain → worse disease activity → more inactivity
The evidence is clear: Exercise improves disease activity (BASDAI), reduces pain and fatigue, enhances quality of life, and improves cardiovascular risk factors without causing joint damage or flares 6, 5.