185 students (aged 14-16) with back pain were randomized to determine the effect of a forward tilting seat wedge on pain reduction. Participants were allocated to either receive the seat wedge, which was used in classrooms for 4 weeks, or not. The outcome of back pain intensity on a numerical rating scale was reported by the students in a pain diary. The results indicated that participants who received the seat wedge had a significant reduction in back pain intensity compared to those who did not receive a seat wedge. However, a number of students were non-compliant or were withdrawn from the study; 55% were available for analysis at the end of 4 weeks.