In what way can family most influence the development of chronic disease

They can choose not to feed you healthy food items, or influence you to stay inside and watch Tv rather then going outside to play and exsercise

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle