Calorie intake is closely related to weight maintenance, as balancing the number of calories consumed with those expended is essential for maintaining a healthy weight. Consistently consuming more calories than the body burns leads to weight gain, while consuming fewer can result in weight loss. It's important to focus not just on quantity but also on the quality of calories, including nutrient-dense foods that support overall health. Monitoring caloric intake can assist individuals in achieving their desired fitness and weight goals.