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Predicted marginals by 3-year intervals, race/ethnicity, and income for the prevalence of meeting the muscle-strengthening guideline (ie, engaging in muscle-strengthening activity on 2 or more days per week) among US adults, adjusted for age and sex. Error bars represent 95% confidence intervals. Black or dashed lines indicates non-Hispanic black; PIR, poverty income ratio; white or solid line, non-Hispanic white.
