Objective. To examine the frequency domain characteristics of the ground reaction forces of young and elderly females during free walking. Design. Independent t-tests were used to examine the frequency content of all three components of the ground reaction force. Background. Frequency domain analysis has the potential to assist in identifying changes in gait that may be masked in the time domai...

This study evaluated kinematic, vertical ground reaction forces, and strength variables in healthy collegiate female basketball, volleyball, and soccer players compared with matched male subjects. Thirty athletes did single-leg landing and forward hop tasks. An electromagnetic tracking device synchronized with a force plate provided kinematic data and vertical ground reaction force data, respec...

Measuring the ground reaction forces of a single leg is indispensable to understanding the dynamics of legged locomotion. Because of the technical state of the art, investigations are limited to animals with a body mass above 1 g. Here we present the design, fabrication, calibration and performance of a novel ultra-miniature force platform at the micronewton level. The sensor was built using th...

The objective of this study was to correlate the effects of muscle force on the movement of the center of pressure (COP) for increased clinical utility of the COP measurement. Five fresh frozen cadaveric specimens were used to apply a 49 N sinusoidal muscle force to isolated or grouped extrinsic ankle muscles, and a constant ankle joint reaction force at different tibial positions. The muscle f...

abstract introduction: identifying factors which cause the high incidence of acl is of great importance .the anterior shear forces are the primary mechanism of load sustained on the acl. during exercise, the activity of muscles and position of lower limbs may increase or decrease the anterior shear force. the purpose of this study is to investigate the relationship between the activity level of...

This paper presents development of a wearable force sensor system for human dynamics analysis. Forces and moments are detected by combining responses from eight load cells fabricated on a parallel connection foundation. Finite element method was used for designing preliminary mechanical structures and simulating the mechanical stresses and strains in the load cells. Sensitivity of the load cell...