Effect of a 12-week workplace interview intervention on physical activity and low back pain: a single-center, randomized controlled study

Abstract

Background Physical activity (PA) is essential in the management and rehabilitation of low back pain (LBP). However, it is not clear if workplace PA interventions can improve LBP. This study aimed to investigate the effects of workplace interview intervention on increasing PA and improving LBP among office workers. Methods We recruited 37 workers of a manufacturing company in Aichi, Japan. Participants were randomly assigned to the intervention group (n=20) or control group (n=17). We affixed waist-worn accelerometers to monitor PA in all participants, and provided face-to-face counseling with a physical therapist or nurse once a week for 12 weeks as workplace PA program to reassurance and encourage participants to keep high levels of PA. PA and LBP severity were assessed at baseline, 3 and 6 months. Results Baseline characteristics were similar in both groups, but PA was significantly higher in the intervention group than in the control group at 3 and 6 months. In the intervention group, was PA significantly increased at 3 and 6 months from baseline and LBP severity improved significantly at 6 months from baseline. We calculated the effect size of the interview intervention, and found that workplace interview intervention had a medium to large effect on PA and LBP severity. Conclusions Our data suggests that workplace PA intervention can increase PA and improve LBP among office workers. Trial registration UMIN-CTR Clinical Trial UMIN000038864 (https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000044321). Registered 12 December 2019, retrospectively registered.