Physical activity and dietary behavior with red blood cell distribution width

Area of Science:

• Cardiovascular Health
• Hematology
• Public Health

Background:

• Limited research exists on the combined impact of physical activity and diet on red blood cell distribution width (RDW).
• RDW is a hematological parameter that may indicate inflammation and cardiovascular risk.

Purpose of the Study:

• To investigate the association between accelerometer-measured physical activity and dietary patterns with RDW.
• To determine if lifestyle factors influence RDW levels in a large population sample.

Main Methods:

• Analysis of data from 4538 participants in the 2003-2006 National Health and Nutrition Examination Survey (NHANES).
• Physical activity assessed via accelerometry over 7 days; dietary intake evaluated using two recall surveys.
• Multivariable linear regression models used to examine associations with RDW, adjusting for cardiovascular disease risk factors.

Main Results:

• Physical activity was inversely associated with RDW (β=-0.07, p=0.002), indicating higher activity levels correlated with lower RDW.
• Dietary patterns were not significantly associated with RDW (β=-0.05, p=0.13).
• No significant interaction was found between physical activity and diet concerning RDW levels.

Conclusions:

• Physical activity, independent of diet, shows an inverse relationship with RDW.
• Findings suggest that regular physical activity may be a modifiable factor influencing RDW.
• Further prospective studies are needed to confirm if physical activity can prevent cardiovascular disease through RDW modulation.