Does physical activity influence the relationship between low back pain and obesity?
Matthew Smuck1, Ming-Chih J Kao2, Nikhraj Brar1
1Department of Orthopaedic Surgery, Stanford Medicine Outpatient Center, 450 Broadway St, Pavillion C, MC6342, Redwood City, CA 94063, USA.
The Spine Journal : Official Journal of the North American Spine Society
|November 19, 2013
Summary
Obesity significantly increases low back pain (LBP) risk in Americans. Physical activity plays a crucial role in reducing this risk, especially for overweight and obese individuals.
Area of Science:
- Epidemiology
- Public Health
- Biomedical Science
Background:
- Growing evidence links obesity and low back pain (LBP), but causal mechanisms remain unclear.
- The specific role of physical activity in this relationship has not been previously demonstrated.
Purpose of the Study:
- To investigate the interrelationship between physical activity, obesity, and LBP in the U.S. population.
- To determine if obesity is a risk factor for LBP and quantify the association.
- To evaluate how physical activity influences the obesity-LBP association.
Main Methods:
- Cross-sectional study using data from 6,796 U.S. adults (2003-2004 National Health and Nutrition Examination Survey).
- Assessed LBP via questionnaire, calculated Body Mass Index (BMI), and monitored physical activity using accelerometry.
- Employed weighted logistic regression models adjusted for demographics and health conditions.
Main Results:
- LBP risk escalates with increasing BMI, from 2.9% in normal weight to 11.6% in ultraobese individuals.
- Smoking is a significant predictor of LBP across all BMI categories.
- Moderate and high-intensity physical activity showed a modulating effect on LBP risk, with greater influence observed in overweight and obese groups.
Conclusions:
- Elevated Body Mass Index is a confirmed risk factor for low back pain in the U.S. population.
- Physical activity is a critical factor in mitigating LBP risk, particularly among individuals who are overweight or obese.
Keywords:
AccelerometryBody mass indexLow back painMusculoskeletal diseasesNHANESObesityPhysical activityMore Related Videos
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