How do I add activities like moving the lawn with a push mower, or weeding a garden in the Health App?

i do my own grounds keeping and it is a lot of exertion. For example , in the fall I use my mower to mulch and catch leaves. That includes pushing the mower, lifting the leaf bag and dumping the leaves, carrying heavy equipment like a powerful blower to clear the beds. Activity like this should be a choice in the Health App.