Activity levels can greatly influence a person's calorie requirements. Physical activity, including exercise and daily movements such as walking, can increase the number of calories a person burns. The more active a person is, the higher their calorie needs will be.
For example, a sedentary person who does little to no physical activity will have a lower calorie requirement than someone who engages in regular intense exercise. This is because the body burns more calories during physical activity, and the more intense the activity, the more calories are burned.
It's important to note that calorie needs vary greatly from person to person, and are influenced by factors such as age, sex, height, weight, and muscle mass. Consulting with a healthcare professional or a registered dietitian is recommended to understand your specific calorie needs.