biostudies-literatureUnknown9(5)Martelli SThe effect of force amount, age, body weight and bone mineral density (BMD) on the femur's force relaxation response was analysed for 12 donors (age: 56-91 years). BMD and fracture load, <i>F</i> _L, were estimated from clinical CT images. The 30 min force relaxation was obtained using a constant compression generating an initial force <i>F</i> ₀ between 7% and 78% of <i>F</i> _L. The stretched decay function (<i>F</i>(<i>t</i>) = <i>A</i> × <i>e</i> ^{(-<i>t</i>/<i>τ</i>)<i>β</i>} ) proposed earlier for bone tissue was fitted to the data and analysed using robust linear regression. The relaxation function fitted well to all the recordings (<i>R</i> ² = 0.99). The relative initial force was bilinearly associated (<i>R</i> ² = 0.8Royal Society open science220301https://www.ebi.ac.uk/biostudies/studies/S-EPMC9066301biostudies-literatureThe effect of age and initial compression on the force relaxation response of the femur in elderly women.PMC9066301Martelli SfalseThe effect of age and initial compression on the force relaxation response of the femur in elderly women.The effect of force amount, age, body weight and bone mineral density (BMD) on the femur's force relaxation response was analysed for 12 donors (age: 56-91 years). BMD and fracture load, <i>F</i> _L, were estimated from clinical CT images. The 30 min force relaxation was obtained using a constant compression generating an initial force <i>F</i> ₀ between 7% and 78% of <i>F</i> _L. The stretched decay function (<i>F</i>(<i>t</i>) = <i>A</i> × <i>e</i> ^{(-<i>t</i>/<i>τ</i>)<i>β</i>} ) proposed earlier for bone tissue was fitted to the data and analysed using robust linear regression. The relaxation function fitted well to all the recordings (<i>R</i> ² = 0.99). The relative initial force was bilinearly associated (<i>R</i> ² = 0.82022-01-01T00:00:00Z2022 May2025-04-22T15:03:47.927Z2024-12-04T04:17:31.926ZS-EPMC90663013559275710.1098/rsos.220301