"Calories burned" refers to the amount of energy your body uses during various activities, including exercise, daily tasks, and even resting. This energy is measured in calories, which are units that indicate how much energy food provides. The number of calories burned can vary based on factors like age, weight, gender, and the intensity of the activity. When you engage in physical activities such as walking, running, or cycling, your body requires more energy, leading to a higher calorie burn. Additionally, even when you are at rest, your body continues to burn calories to maintain essential functions like breathing and digestion, known as the basal metabolic rate (BMR).