A very active person use a large amount of energy and therefore has a high

metabolic rate. This means that their body requires more calories to fuel their physical activities and maintain their overall energy levels. The high metabolic rate allows for faster processing of nutrients and efficient conversion of food into energy, enabling the person to sustain intense physical activity for extended periods of time. Additionally, an active lifestyle helps to increase muscle mass, which further contributes to a higher metabolic rate as muscles require more energy to function compared to fat.