The effects of a two-minute original exercise program supported by the workplace unit on the workers' work engagement: the "Bipoji" exercise.

The study used only two facilities, so the results may not apply to other workplaces. Workers were not randomly assigned; whole facilities were put into the support or control group, so other differences between the workplaces may have affected the result. The groups differed at baseline in gender, and although the analysis adjusted for age, gender, body mass index, smoking status, and baseline scores, the authors state that unknown biases cannot be ruled out. Participants probably knew which group they were in, and the outcome was self-reported work engagement, so expectations may have influenced answers. Follow-up counts are reported inconsistently: the text gives 65 support and 97 control, while the adjusted table gives support n=97 and control n=65. The study followed workers for only two months, so it does not show whether engagement changes last. The paper measured work engagement, not pain, posture, function, or objective productivity, so it does not show a clinical physical outcome.

The authors report no financial support or other benefits from commercial sources for the work. Ko Matsudaira is a shareholder and adviser of Trunk Solution Co., Ltd., and received grants, endowed chair support, lecture fees, and advisory fees from multiple companies outside the submitted work. Hiroyuki Oka received grants and personal fees from several companies. The other authors declared no conflicts.

Do not conclude that the two-minute exercise itself improved work engagement. The support group received both the exercise and workplace committee support, and the study did not randomise workers, so the exercise, the support system, and the two different facilities cannot be separated.