Try to reduce your daily sitting time; walk rather than drive short distances, such as to the shop; take the stairs instead of the escalator or lift
Try to exercise at least 150 minutes a week, making an effort to get warm, a little sweaty and out of breath, to the extent that it is difficult to hold a conversation. For example, exercise for 30 minutes on five days a week. If 30 minutes in one go is too much, try shorter periods, such as three times 10 minutes.