High Amount of Physical Activity on Work Days Is Associated with More Intense Musculoskeletal Symptoms in Nurses: Seven-Day Observational Study

Background: Musculoskeletal problems contribute to nurse attrition, which compromises patient safety and costs healthcare organizations millions of dollars. Recent research describes a physical activity paradox in which high amounts of work-related physical activity may be detrimental to health; however, there is a lack of evidence on the physical activity paradox with respect to musculoskeletal health in nurses. The purpose of this study was to examine the relationship between musculoskeletal symptoms (MSSs) and high amounts of physical activity at work in nurses. Methods: This was a 7-day observational design using direct measurement of physical activity and self-reported MSSs in nurses. Physical activity was measured in step counts using a wearable accelerometer and MSSs were reported using ecological momentary assessment. Step counts and MSSs were compared between work days and days off, and a regression model analyzed the combined effect of physical activity and work days on MSSs while controlling for age, exercise, and body mass index. Results: Musculoskeletal symptoms and step counts were significantly higher on work days compared to days off. Higher step counts on work days resulted in significantly higher expected MSS ratings than the same number of steps taken on a day off. Conclusions: This study supports the existence of a physical activity paradox in nurses with respect to MSSs. Understanding this paradox in the nursing workforce can translate to interventions that reduce the detrimental health effects of high levels of physical activity at work, which can minimize nurse attrition, improve patient outcomes, and reduce costs in healthcare organizations.