How do the elderly negotiate a step? A biomechanical assessment

摘要: Abstract Background Tripping over a raised surface is considered to be the most common cause of falls in elderly. The aim this study was detect alterations motor pattern elderly subjects while climbing single step (“one negotiation”) which may account for tripping and risk falling. Methods We tested sample 32 “healthy” with mean age 72.4 years (SD 4.81; range 65–86). control group consisted 18 young 26.5 2.12; 24–33). An experimental set-up kinematic assessment provided. population characterized clinically functionally by comprehensive geriatric including information about comorbidity, disability, depression, motor, muscular function. Findings Despite high level ability measured clinically, biomechanical analysis enabled us demonstrate precise changes step-climbing strategy A prolonged double stance phase duration, greater anterior flexion trunk, hip, reduced dorsiflexion ankle were detected respect controls. All these factors especially latter could determinants possible tripping. Interpretation performed on healthy subject has shown abnormalities hip during task execution. This can relevance planning physical activity programs adapted aimed at reducing