Light exercises like slow walking, gardening or even dusting not only lowers the risk of cardiovascular diseases but improves strength, lowers blood pressure or (hypertension), lowers stress, helps in maintaing an ideal weight.
All in all, light exercises helps in maintaining a quality life with improved health and mental well being.
To have a good sense of self means to recognize limits and to know how comfortable you are with something. It helps you by making healthy decisions that are right for you.