Physical Capability Outcomes After Single-Level PD-L vs Single-Level ALIF: a Multi-Center Clinical Trial

Physical capability testing will be conducted once before surgery and at 6 months and 1 year after surgery. Physical capability testing assesses the ability to perform a number of common tasks: the distance a subject can walk comfortably in 6 minutes; the amount of weight a subject can lift, push, pull, and carry; and the ability to squat and work bending forward in the kneeling and standing positions. The results of this testing will be evaluated to determine whether the subject's physical capability meets the physical requirements of their job, based on their responses to a pre-study questionnaire. Each physical capability testing session will require from 1 to 1 ½ hours of the subject's time. Physical capability testing will be provided without charge.