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- W2068102145 abstract "Hip fracture risk increases dramatically with age, and 90% of fractures are due to falls. During a fall on the hip, the soft tissues overlying the hip region (skin, fat, and muscle) act as shock absorbers to absorb energy and reduce the peak force applied to the underlying bone. We conducted dynamic indentation experiments with young women (aged 19–30; n=17) and older women (aged 65–81; n=17) to test the hypothesis that changes occur with age in the stiffness and damping properties of these tissues. Tissue stiffness and damping were derived from experiments where subjects lay sideways on a bed with the greater trochanter contacting a 3.8 cm diameter indenter, which applied sinusoidal compression between 5 to 30 Hz with a peak-to-peak amplitude of 1 mm. Soft tissue thickness was measured using ultrasound. On average, stiffness was 2.9-fold smaller in older than young women (5.7 versus 16.8 kN/m, p=0.0005) and damping was 3.5-fold smaller in older than young women (81 versus 282 N s/m, p=0.001). Neither parameter associated with soft tissue thickness. Our results indicate substantial age-related reductions in the stiffness and damping of soft tissues over the hip region, which likely reduce their capacity to absorb and dissipate energy (before “bottoming out”) during a fall. Strategies such as wearable hip protectors or compliant flooringmay compensate for age-related reductions in the shock-absorbing properties of soft tissues and decrease the injury potential of falls." @default.
- W2068102145 created "2016-06-24" @default.
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- W2068102145 date "2015-02-01" @default.
- W2068102145 modified "2023-10-10" @default.
- W2068102145 title "Age-related changes in dynamic compressive properties of trochanteric soft tissues over the hip" @default.
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- W2068102145 doi "https://doi.org/10.1016/j.jbiomech.2014.12.026" @default.
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