DEEP KNEE ACTIVITIES: IN VITRO KINEMATIC MEASUREMENTS TO COMPARE WITH IN VIVO STUDIES

摘要

Deep knee flexion is required for many activities of daily living during work, exercise, religious worship, and hobbies. Walker et al. [1] found that activities such as rising from a low chair or getting into or out of bath require between 100° and 160° of knee flexion. Other activities such as kneeling or squatting to pick an item off the ground can be difficult with a limited range of motion. Beside deep knee flexion being important for daily living activities, it is essential in non-Western cultures that commonly sit in deep knee-bending positions. Simulating activities in vitro to represent physiological conditions is difficult. Assumptions and simplifications have to be made in order to make the test feasible to conduct. The purpose of this study was to compare the results for simulated daily living activities such as squatting and kneeling in vitro to those found in vivo.