| Δ0 | vigorous vacuuming itself | vacuuming the house energetically |
| Δ1 | other vigorous household chores done briskly as informal exercise | scrubbing floors energetically, energetic mopping, aggressive window washing, brisk sweeping, vigorous furniture rearranging |
| Δ2 | other light domestic physical activities around the home | gardening, raking leaves, carrying laundry baskets, washing the car, weeding the yard |
| Δ3 | everyday incidental physical activities outside the home context | climbing stairs at work, walking the dog, carrying groceries, playing with kids, mowing the lawn |
| Δ4 | structured light exercise routines | casual walking, yoga, stretching classes, leisurely cycling, tai chi |
| Δ5 | sedentary everyday activities essentially unrelated to physical exertion | reading a book, watching TV, doing taxes, planning a grocery list, checking email |