Abstract: ObjectiveTo observe effects of exercises of lower extremities isometric mucles contraction on disuse amyotrophy after inmobilized with plaster spica of hip .Methods47 cases inmobilized with plaster spica of hip were divided into the treatment group (37 cases) and control group (10 cases). Patients of the control group were treated regularly. Patients of the treatment group were taken exercises of lower extremity isometric muscles contraction gradually after stitches removing. When the plaster inmobilization was moved, the circumference of bilateral thigh and crus were measured. All data were analyzed with SPSS 10.0.ResultsThe disuse amyotrophy of patients of the treatment group was lighter than that of the control group.ConclusionLower extremities exercises of isometric muscles contractionIt can prevent disuse amyotrophy of patients inmobilized with plaster spica of hip .

Key words: isometric muscle contraction, disuse amyotrophy, plaster spica of hip