This contract aims to obtain human biomechanical data to help NIOSH improve knee-saver designs and reduce knee osteoarthritis risk for workers in high knee-flexion occupations like construction and flooring. The contractor will conduct a series of tests measuring deep squatting tasks both with and without various knee-saver devices. No specific budget amount or performance location is provided in the description. The data will support development and validation of biomechanical models analyzing knee and spine loading. This opportunity is part of a NIOSH NORA-funded research project focused on reducing joint loading during squatting.