<human>:  How much physical exercise is recommended for a healthy lifestyle?
<bot>: The amount of physical exercise recommended for a healthy lifestyle varies depending on age, physical ability, and overall health. Generally, it is recommended adults get at least 2.5 hours of moderate physical activity per week, which can include walking, cycling, and other aerobic activities. Strength training, such as lifting weights, is also important and should ideally be done two to three times per week.