Ideally we want to be moving 60 mins a day – incidental exercise such as housework, walking to work or school, chasing the kids etc all counts, if it gets your heartrate up.
Try and squeeze in a few repitions of exercises in every couple of days (2 or 3 times a week). They’re great not just for getting the heart pumping, but for stretching places that day to day life doesnt quite touch.