Polymyalgia rheumatica (PMR) is a common inflammatory condition in adults over 50 (rare under 50, peak incidence in the 70s) characterised by bilateral pain and stiffness in the shoulder girdle and pelvic girdle. It is not a muscle disease (despite the name) but an inflammatory condition of the synovial structures and bursae around these joints. Its walking implications are underappreciated in the cane literature.
How PMR Affects Walking
PMR walking impairment is primarily through the pelvic girdle involvement:
- Hip girdle stiffness and pain: Bilateral stiffness and aching in the hips, thighs, and buttocks makes initiation of walking painful and the walking pattern stiff and slow
- Morning stiffness: Characteristic morning stiffness lasting 45 minutes or more is the hallmark of PMR. The first walking after rising is the most difficult -- improving progressively as the joints and bursae warm up with movement
- Reduced hip flexion range: The stiffness reduces the stride length possible at comfortable exertion levels
- Bilateral symmetric pattern: Unlike conditions that preferentially affect one side, PMR is bilateral. This means the cane decision is not simply about which side to support
Steroid Treatment and Its Walking Effect
PMR responds rapidly and dramatically to corticosteroids (prednisolone, typically 15-25mg/day starting dose). Most patients experience near-complete relief of stiffness within 24-72 hours of starting treatment. The walking implications:
- During active untreated or undertreated PMR: cane useful for morning stiffness management and energy economy throughout the day
- After corticosteroid initiation: walking capacity may improve substantially within days. The cane need may reduce rapidly
- However, prolonged high-dose steroids cause proximal muscle weakness (steroid myopathy) -- exactly the muscle groups (hip girdle, thigh) most needed for walking. This is a secondary impairment that may emerge as PMR improves but steroid myopathy develops
- As steroids are tapered over months to years, steroid myopathy gradually resolves but PMR may also relapse
GCA Association and Systemic Implications
PMR is associated with giant cell arteritis (GCA) in approximately 15-20% of cases. GCA is a systemic vasculitis that can cause visual loss, and its treatment requires very high-dose steroids. While GCA itself does not primarily impair walking, the very high steroid doses needed can cause more severe proximal myopathy. This is a cane-relevant consideration in PMR patients with concurrent GCA.
PMR Stages and Cane Use
| Stage | Walking Limitation | Cane Role |
|---|---|---|
| Active PMR (untreated) | Morning stiffness, pelvic girdle pain | Morning use especially; energy economy |
| Early steroid treatment | Rapid improvement -- cane need may reduce | Reassess within days-weeks; may become unnecessary |
| Established steroid myopathy | Proximal muscle weakness | Compensate hip/thigh weakness |
| Steroid taper | Variable -- PMR may relapse as dose reduces | Resume cane use if PMR relapse causes stiffness |
| Remission | Near-normal walking | Not usually needed |
Explore the DaiWalk cane collection. Related: Walking Cane and Steroids | Walking Cane for Rheumatoid Arthritis
