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The muscle strength of the lower extremities was measured in 52 subjects between 30 to 48 years of age with chronic peripheral circulatory deficiency (grade endarteritis obliterans II–IV). The dynamometry was used to record the moments of strength of the flexor and extensor muscles of the crus and the dorsal and plantar flexors of foot. The transverse stiffness of the gastrocnemic muscles and the relationship between the strength of the crural muscles and the angle of talocrural articulation were investigated. The maximum moments of strength of the femoral and crural muscles in subjects with chronic peripheral circulatory deficiency were lower than those in the age-matched healthy subjects; as the pathological process increased, this difference became more significant. In subjects with endarteritis obliterans, the functions of the femoral and crural muscles decreased to the same extent.