Gender Differences in C-Reactive Protein and Muscle Strengthening Activity.

Area of Science:

• Public Health
• Exercise Science
• Biomarkers

Background:

• Limited research exists on gender-specific associations between C-reactive protein (CRP) and muscle strengthening activity (MSA).
• Understanding these differences is crucial for targeted health interventions.

Purpose of the Study:

• To investigate gender differences in the relationship between muscle strengthening activity (MSA) and elevated C-reactive protein (CRP) levels.
• To explore the potential mediating role of waist circumference (WC) in this association.

Main Methods:

• Analysis of data from 7533 U.S. adults (≥20 years) from the 1999-2004 National Health and Nutrition Examination Survey (NHANES).
• Categorization of muscle strengthening activity (MSA) into no activity, some activity (1-2 days/week), and meeting DHHS recommendations (≥2 days/week).
• Elevated C-reactive protein (CRP) defined as >3 to 10 mg/L; adjustment for waist circumference (WC) was performed.

Main Results:

• Women engaging in some MSA showed significantly lower odds of elevated CRP (OR 0.64).
• Men meeting DHHS MSA recommendations had significantly lower odds of elevated CRP (OR 0.72).
• After adjusting for waist circumference (WC), the association remained significant for men but not for women.

Conclusions:

• Waist circumference (WC) may mediate the relationship between muscle strengthening activity (MSA) and C-reactive protein (CRP).
• This mediating effect of WC appears stronger in women.
• Findings suggest tailored approaches considering gender and body composition for managing CRP levels through exercise.