Introduction[edit | edit source]
Contractures are generally myogenic and can mimic cramps. Often described by patients as exertional muscle stiffness or muscle cramping after arbitrary movement such as lifting heavy objects for more than a few seconds or after repetitive movements. Stretching the affected muscle during a contracture does not provide relief, and contractures generally last longer than muscle cramps. Painful contractures are prominent in metabolic myopathies such as McArdle disease, glycogenosis type V. 
Definitions[edit | edit source]
Contractures are defined as shortenings of the muscle resulting in an inability of the muscle to relax normally.
- Dijkstra JN, Boon E, Kruijt N, Brusse E, Ramdas S, Jungbluth H, van Engelen BG, Walters J, Voermans NC. Muscle cramps and contractures: causes and treatment. Practical Neurology. 2023 Feb 1;23(1):23-34.
- Berardo A, DiMauro S, Hirano M. A diagnostic algorithm for metabolic myopathies. Current neurology and neuroscience reports. 2010 Mar;10:118-26.