Mechanical Fatigue of Bovine Cortical Bone Using Ground Reaction Force Waveforms in Running.

ABSTRACT: Stress fractures are a common overuse injury among runners associated with the mechanical fatigue of bone. Several in vivo biomechanical studies have investigated specific characteristics of the vertical ground reaction force (vGRF) in heel-toe running and have observed an association between increased loading rate during impact and individuals with a history of stress fracture. The purpose of this study was to examine the fatigue behavior of cortical bone using vGRF-like loading profiles, including those that had been decomposed into their respective impact and active phase components. Thirty-eight cylindrical cortical bone samples were extracted from bovine tibiae and femora. Hydrated samples were fatigue tested at room temperature in zero compression under load control using either a raw (n?=?10), active (n?=?10), low impact (n?=?10), or high impact (n?=?8) vGRF profile. The number of cycles to failure was quantified and the test was terminated if the sample survived 105 cycles. Fatigue life was significantly greater for both impact groups compared to the active (p?

SUBMITTER: Loundagin LL 

PROVIDER: S-EPMC5798456 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature