The gastrocnemius muscles, which form the upper part of the calf, can suffer from retraction, a common but often under-diagnosed condition, which can be a risk factor for plantar fasciitis. Retraction can be treated medically, by stretching, or surgically, by lengthening the muscles. Gastrocnemius retraction is difficult to measure, but tests such as the Ankle Dorsiflexion Index (ADI) provide a more accurate assessment.
Knowing the prevalence of this retraction in patients suffering from plantar fasciitis would enable us to improve diagnostic criteria and better target treatments. Surgical lengthening of the gastrocnemius, particularly by tenotomy, is effective in cases of chronic plantar fasciitis, even without apparent muscle retraction.
Patient aged 70 or under
Patient suffering from unilateral plantar fasciitis that has progressed for more than 6 months and is recalcitrant to medical treatment
Collection of express, oral consent
Available for follow-up visits
Patients with neuropathic pain
History of fracture of the lower limb, surgery on the lower limb, inflammatory rheumatism of the lower limb, injury to the Achilles tendon
Patient with another painful orthopedic lesion of the legs/feet
Patient with surgically treated plantar fasciitis in the year prior to inclusion
Single group
Ankle Dorsiflexion Index (ADI) measurement
Diagnostic testAnkle Dorsiflexion Index (ADI) measurement at D0 and W8
Prevalence of gastrocnemius muscle retraction in patients with plantar fasciitis
retraction of the gastrocnemius muscles will be defined by an ADI of less than 13° measured by a digital inclinometer
correlation between ADI measurement and Manchester Oxford Foot Questionnaire (MOXFQ)
The Manchester Oxford Foot Questionnaire (MOXFQ) is used to measure the impact of foot pain on patients' quality of life. It consists of 16 questions. The raw scores of the scales are converted into a metric scale ranging from 0 to 100, where 100 indicates the maximum intensity of suffering or limitation.
correlation between ADI measurement and pain Visual Analog Scale (VAS)
The VAS consists of a straight line where one extreme represents the total absence of pain and the other extreme, the most intense pain possible. Patients are asked to mark on this line the level of pain they feel at any given moment. Pain intensity is then measured according to the distance between the start of the scale (0) and the point where the patient placed his mark: * 0 cm (or the start of the scale): No pain * 10 cm (or the end of the scale): Maximum imaginable pain
Evolution of Visual Analog Scale (VAS)
The VAS consists of a straight line where one extreme represents the total absence of pain and the other extreme, the most intense pain possible. Patients are asked to mark on this line the level of pain they feel at any given moment. Pain intensity is then measured according to the distance between the start of the scale (0) and the point where the patient placed his mark: - 0 cm (or the start of the scale): No pain - 10 cm (or the end of the scale): Maximum imaginable pain
Evolution of Visual Analog Scale (VAS)
The VAS consists of a straight line where one extreme represents the total absence of pain and the other extreme, the most intense pain possible. Patients are asked to mark on this line the level of pain they feel at any given moment. Pain intensity is then measured according to the distance between the start of the scale (0) and the point where the patient placed his mark: - 0 cm (or the start of the scale): No pain - 10 cm (or the end of the scale): Maximum imaginable pain
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