The grandchildren give me all the exercise I can handle.
By the time I've wrestled the baby into her nappy, tights and boots, hoisted the double buggy out of the car, lifted two toddlers into it, pushed it up the very steep hill, dragged it up steps, chased them around the soft play centre, slid down the slide and climbed back up again, stretched under furniture to retrieve toys, lifted baby in and out of supermarket trollies and car sears, fought with swords and light sabres, and so on, I've probably exercised and stretched every muscle group and raised my heart beat to danger levels. 