Hello archus,
regular chores and working while fasting are fine just so long as you have the energy to do it. It also depends on your reasons for fasting as well.
With illness or disease it is best to rest as much as possible to conserve your energies for the more important tasks of cleansing & healing, which activity will divert & dissipate.
However, if you are fasting for weight-loss or non-health issues then working and chores are fine while fasting, but be careful not over-tax yourself in a physically demanding work-place. Try to listen to the wants and needs of your body as to what is best for it.