1-hour session a week for 4 week Pt. received the exercises under the supervision of the physical therapist
Home Exercise (once a day or more) 3 sets of 10 reps. (no monitoring)
They measured trunk flexion range of motion only at baseline and immediately after treatment to avoid potential loss to follow-up at 3 and 6 months after randomization.
Most follow-up data were collected over the telephone.