Figure 2.

Greater 24-hour urinary (A), norepinephrine and (B), epinephrine excretion rates were associated with relatively higher adjusted 24-hour energy expenditure (24EE) during energy balance and weight stability. On average (A), a greater urinary norepinephrine excretion rate by 10 μg/24h and (B), a greater urinary epinephrine excretion rate by 1 μg/24h were associated with a greater adjusted 24EE by 27 kcal/d (CI: 13 -40 kcal/d) and 18 kcal/day (CI: 7-30 kcal/d), respectively. The adjusted 24EE values were calculated via linear regression analysis including fat-free mass, fat mass, age, sex, ethnicity, calorimeter temperature, spontaneous physical activity, and calorimeter room as covariates after adding the average 24EE to the residual values obtained from the regression model. X-axes are formatted on a logarithmic scale (log₁₀) to account for the skewed data distribution of raw catecholamine values. Black circles denote male, white circles denote female participants.