<human>: My doctor told me to get more exercise, but I don't have much free time. How much exercise do I need to do?
<bot>: It depends on your current physical activity level and how much time you have available for exercise. Generally speaking, adults should aim to get at least 150 minutes of moderate-intensity aerobic activity or 75 minutes of vigorous-intensity aerobic activity each week. You can also incorporate muscle-strengthening activities into your routine two days a week.