Lower Extremity Energy Absorption and Biomechanics During Landing, Part I: Sagittal-Plane Energy Absorption Analyses

Lower Extremity Asymmetries during Jump-landing Tasks

Higher side-to-side asymmetry among female athletes compared to their male counterparts during bilateral athletic tasks such as landing from a jump has been proposed as a potential source of non-contact knee injuries. However, the kinematic symmetry and potential sex differences during bilateral landings have not been examined. The purpose of this study was to evaluate lower extremity kinematic...

The Effect of a Cognitive Task on Lower Extremity Biomechanics and Performance during Landing

The Effect of a Secondary Cognitive Task on Lower Extremity Biomechanics During Landing

Background: The purpose of this study was to examine the effect of a cognitive task on jump-landing biomechanics and performance. Methods: 26 recreational athletes participated in the study. Participants jumped forward off of a 30cm box a distance equal to one half of their body height, then immediately performed a countermovement jump. This movement was performed in a control condition, while ...

Lower Extremity Biomechanics of an Ankle ‘giving Way’ Case during the Drop Landing

The purpose of our study was to present an accidental ankle ‘giving way’ case of a participant with chronic ankle instability (CAI) during drop landing test and compare lower extremity biomechanics with that of the participant’s normal landing trials. A 7-camera Vicon system was used to capture motions of the participant drop landing from a 30-cm high box. Ground reaction forces were collected ...

The Effect of Local Damage on Energy Absorption of Steel Frame Buildings During Earthquake

Progressive collapse is a kind of failure in which whole or large part of a structure collapse when a local damage occurs and distributes to other parts. Many researchers focus on the column removal analysis and study of the structure behavior under effect of gravity loads, so these investigations are mostly carried out on the tall building. Earthquake inspections indicate structural element ca...