Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Physical activity is an important part of balanced eating. It helps you use up any extra Calories in the foods you eat. You should try to get at least an hour of exercise just about every day (see Figure below ). Exercise has many health benefits in addition to balancing the energy in food. For example, it strengthens the bones and muscles and may improve your mood. Answer: hour
How much exercise should a person ideally get during a single day?