If someone has a positive energy balance, they are:

• A. Gaining weight.
• B. Losing weight.
• C. Maintaining weight.

Answer: (A)

Verified step by step guidance

1. Understand the concept of energy balance: Energy balance refers to the relationship between the energy consumed (calories from food and drink) and the energy expended (calories burned through basal metabolic rate, physical activity, and thermogenesis).
2. Define positive energy balance: A positive energy balance occurs when the energy intake exceeds the energy expenditure. This means the body is consuming more calories than it is using.
3. Relate positive energy balance to body weight: When there is a surplus of energy (calories), the body stores the excess energy as fat, leading to weight gain over time.
4. Eliminate incorrect options: Losing weight requires a negative energy balance (calories burned exceed calories consumed), and maintaining weight requires an energy balance where intake equals expenditure. These do not align with the definition of a positive energy balance.
5. Conclude the correct answer: Based on the explanation, a positive energy balance results in gaining weight.