Table 2.

Flow chart of study.

	Study period
	Recruitment	Intervention period			Observation period
Visit	Screening	V1 Before intervention	V1 After intervention	V2-V6	V7
Checking the selection/exclusion criteria	●
Vital signs	●	●		●	●
Demographic surveys and body measurements	●
Medical history of lumbar and other body organs	●
Lumbar spine X-ray and computed tomography (CT)	●
Physical examination	●
Random assignment		●
Treatment (Orthopedic or sham device)		●		●