Isotemporal Substitution of Sedentary Behavior by Different Physical Activity Intensities on Pain and Disability of Patients with Chronic Low Back Pain: A Cross-Sectional Study
Department or Administrative Unit
Nutrition Exercise and Health Sciences
ObjectiveTo investigate the association of Isotemporal Substitution Modeling (ISM) of time spent in sedentary activities with physical activity in different intensities on pain and disability of patients with chronic Low Back Pain (LBP).
DesignObservational and cross-sectional study. Device-measured physical activity levels were assessed using an actigraph. Pain intensity was measured using the 11-point Numerical Rating Scale, and disability was measured using the Roland Morris Disability Questionnaire. The ISM was used to estimate the theoretical substitution association of reallocating time from one exposure variable to an equal amount of time in another exposure variable while holding total activity time constant.
SettingsOutpatient Physical Therapy Clinic.
ParticipantsThis study included data from 358 patients with chronic Low Back Pain aged between 18 and 60 years.
Main Outcome Measure(s)Pain and disability.
ResultsOur results suggest that replacing 60 minutes of sedentary behavior with 60 minutes of vigorous activity in a week is significantly associated with a decrease in pain (B= -1.67, 95% CI: -3.18 to -0.15). Additionally, replacing 60 minutes of light physical activity (B= -1.67, 95% CI: -3.18 to -0.16) or moderate activity (B= -1.67, 95% CI: -3.21 to -0.13) with the same amount of time of vigorous activity per week may also favorable reductions in pain. For the analysis of disability, no significant associations (p>0,05) for disability in any of the isotemporal models were found.
ConclusionsOur results showed that replacing 60 minutes of sedentary behavior with equal amounts of vigorous activity per week was associated with reductions in pain intensity. Similarly, replacing a light or moderate activities with vigorous activity was also associated with reductions in pain intensity. Finally, no significant associations were observed between time spent in sedentary activities with physical activity in different intensities for disability.
Freire, A. P. C. F., de Oliveira, C. B. S., Christofaro, D. G. D., Shumate, S., Marques, L. B. F., & Pinto, R. Z. (2022). Isotemporal Substitution of Sedentary Behavior by Different Physical Activity Intensities on Pain and Disability of Patients with Chronic Low Back Pain: A Cross-Sectional Study. Archives of Physical Medicine and Rehabilitation, ahead of print. https://doi.org/10.1016/j.apmr.2022.03.017
Archives of Physical Medicine and Rehabilitation
© 2022 Published by Elsevier Inc. on behalf of The American Congress of Rehabilitation Medicine.