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The association of monthly-averaged daily physical activity with the risk factors related to hip fracture was investigated in older adults aged 70 and over. Daily physical activity was assessed by usi...ng an accelerometer attached with a pedometer. We assessed the variables related to possible risk factors inducing hip fracture, i.e., muscle volume in arm and leg, bone mineral density in spine and leg, gait ability, and body sway during standing in active (n=43, > 7,000 steps per day) and inactive groups (n=37, <2,800 steps per day). The active group had significantly higher bone mineral density in major trochanter, greater muscle volume of quadriceps, and gait abilities than inactive group. It was implied that a sedentary lifestyle is associated with the risk factors related to hip fracture, such as gait abilities, bone mineral density of major trochanter and muscle mass of quadriceps, indicating that maintaining the daily physical activity is effective in preventing fall possibly through counteracting the decline of muscle mass, bone mineral density and gait characteristics in elderly women.show more
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