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Are static and dynamic squatting activities comparable

Squatting activities, such as sitting on chair, kneeling, or squatting to get dressed, are daily living tasks. Numerous studies have described three-dimensional (3D) kinematics, 3D kinetics and electromyography of the lower limb during squatting activities [1]. 3D kinetics and electromyographic data can be collected during static or dynamic movements using force plates and electrodes. However, acquisition of 3D kinematics data depends on the available device. Open MRI and fluoroscopic systems allow recording 3D kinematics during static and dynamic squatting activities respectively [2-3], whereas motion tracking system can be used in both activities. The question arising is “Are static and dynamic activities comparable?”