Objective To study the fall risk of older adults stepping over obstacles of different heights with their dominant or non-dominant legs and provide references for developing fall prevention measures for the elderly during obstacle-crossing.Methods Sixteen older adults randomly stepped over obstacles at 15%,30%,and 45%of their leg heights with their dominant and non-dominant legs.A three-dimensional(3D)motion capture system and 3D force platform were used to record kinematic and kinetic data.Results When older adults used their non-dominant leg to step over obstacles,the dynamic stability in the anterior-posterior direction of the trailing leg at 30%of leg length height was significantly lower than that at 15%of leg length height(P<0.05,Cohen's d=0.628);the vertical toe clearance of the trailing leg was significantly smaller than that of the dominant leg(P=0.041,Cohen's d=0.516),and the vertical toe clearance(P<0.001,Cohen's d=0.685)and anterior-posterior toe clearance(P=0.043,Cohen's d=0.616)of the leading leg were significantly greater than those of the dominant leg.Conclusions Compared to stepping over obstacles with the dominant leg,older adults have a greater risk of falling in the anterior-posterior direction before obstacles when using the non-dominant leg.There is also a greater risk of the trailing leg tripping over obstacles of different heights.
older adultcrossing obstaclesfall riskdominant legnon-dominant leg
维普
万方数据
