Verification Experiments on the Lower Back Burden caused by Posture and Environment during Lifting Operations

One of the measures to prevent back pain is the use of appropriate posture corrections.In generally, the Squat method (method of keeping the knees bent and the waist as straight as possible) is recommended over the Stoop method (method of keeping the knees straight and the waist bent).The results of previous studies using acceleration and muscle potentials have shown that the lifting with knees in a kneeling position reduces the amount of load born by the lower back.However, few studies discuss the case where there is an obstacle between the subject and the object to be lifted and further, the scenarios where the object is away from the body's center of gravity.Therefore, this research focus on analyzing three types of movements using the AnyBody musculoskeletal mechanics analysis software, the Yo-bukun back pain prevention application, and the Delsys surface EMG and verifying the amount of lower back burden when there is an obstacle between the lifting object and the subject.This paper presents the verification results.