The kinematometer--an integrated kinematic sensor for kinesiological measurements

Area of Science:

• Biomechanics
• Human Locomotion
• Kinetics and Kinematics

Background:

• Calculating human joint forces and moments typically relies on inverse dynamics.
• Existing methods may lack precision in capturing complex limb movements.

Purpose of the Study:

• To introduce and validate the Integrated Kinematic Sensor (IKS) approach for estimating joint loads.
• To assess the accuracy of IKS in human locomotion analysis.

Main Methods:

• The IKS approach integrates position, linear acceleration, and angular velocity measurements.
• It utilizes six degrees of freedom analysis for rigid body motion.
• Validation involved an instrumented compound pendulum and human shank segment analysis during walking.

Main Results:

• The IKS approach demonstrated a high correlation with directly measured joint loads on a simulated limb segment.
• Analysis of the human shank during walking yielded results consistent with existing literature.
• The study identified novel transient dynamics during heel strike and toe off.

Conclusions:

• The Integrated Kinematic Sensor (IKS) approach provides a reliable method for calculating human joint forces and moments.
• This technique offers enhanced accuracy and detailed insights into lower limb biomechanics during locomotion.
• IKS contributes valuable data on transient phases of gait, advancing the field of biomechanical analysis.