True .
Our bodies don't feel that urge of water in cold conditions, we become dehydrated without knowing it . In hot conditions we sweat .
its consiterd a disease because it can have a risk of heart attacks and it can cause your body not to function right meaning no more getting up to do things and no more seeing the sun or the birds unless you have a weel chair and its consitered a disease because you are mostlikly to die a couple years ater unless you change your way and loses weight.
i hope this helps
The knee is were most injures happen. ways to prevent them is to wear knee pads and such so if you trip and fall.
