Figure 1-1. Energy Balance: Intake vs. Output

Figure 1-1. Energy Balance: Intake vs. Output

Intake = 3000 kcal Output = 3000 kcal Weight Maintained

Intake = 4000 kcal Output = 2000 kcal Weight Gain

Intake = 2000 kcal Output = 3000 kcal Weight Loss

Taken from FI Katch and WD McArdle. Nutrition, Weight Control, and Exercise, 3rd ed. Philadelphia; Lea & Febiger, 1988.