One of the first descriptions of late-onset muscle weakness following poliomyelitis was made in 1875 by Raymond, It is estimated that there are currently about 120,000 people in the UK who contracted poliomyelitis and who were mostly forgotten about after the introduction of effective vaccination in the 1950s. 2 Some recovered fully or had mild residual muscular weakness while others had more significant persisting disability. Irrespective of the degree of recovery, up to 80% have or will develop new neurological symptoms known as post-polio syndrome (PPS), which may lead to significant new functional limitations. 3 Deterioration years after acute polio, first described at Charcot's clinic in 1875, was not seriously researched until the 1980s and 1990s. The 1875 description quoted above includes the classic features of new weakness in the stronger limbs accompanied by muscle fatigue. There is now consensus that PPS symptoms usually develop after a stable period of 20 to 40 years following the initial illness, and include muscle weakness, fatigue (general, muscular or mental), muscle and joint pain, new muscle atrophy, sleep and respiratory problems, dysphagia and cold intolerance. As the cohort of polio survivors ages, there is a need for more understanding of this condition and how it can best be managed.The cause of PPS is unknown with the leading hypothesis being that excessive metabolic stress on the remaining enlarged motor units, especially those initially damaged, results in the loss of nerve terminals and eventually of motor neurons themselves. 4,5 Risk factors for developing PPS are greater severity of initial illness, greater degree of recovery or greater impairment, higher activity levels, older age at time of acute illness, female gender, longer interval since acute illness and neuromuscular symptoms (cramps, fasciculations and muscle pain) during the stable period. 6,7 New weakness occurs both in muscles known to have been affected during the initial illness and in those thought to have been unaffected where damage was subclinical. Fatigue is the most common symptom and may include:• a general feeling of exhaustion made worse by activity and improved by rest,• muscle fatigue, felt often as heaviness and aching in the muscles,• mental fatigue, experienced as difficulty processing information.The fatigue is multifactorial and is thought to combine central and peripheral aspects. 8 Muscle pain is usually described as an aching, burning or cramp related to physical activity. Joint pain is often due to weakness around joints, which may lead to bursitis, tendonitis and osteoarthritis. 8 Several studies have looked at the relationship between the weakness, pain and fatigue and found that pain correlates with activity, but not weakness. 9 A subsequent study found that pain was more common in women, and that joint and muscle pain might have different pathologies, as joint pain correlated with initial and recent increased weakness, whereas muscle pain correlated with fatigueability, activity, and younger age ...