Why is it important to warm up your muscles before a workout?

It helps prepare the muscles for the workout by gently increasing blood flow.   It also helps loosen the joints.   Warming up also gradually prepares the heart for increase in activity.   It can also help prepare you for the workout mentally.

It helps to stretch the muscles, therefore preventing soreness and injury. It also helps get oxygen into the muscles.

It is very important to stay hydrated. your body needs it for may things for cells, tissues, your organs and etc. water also with your temperature that way you don’t get a headache etc. i bet if you look it up there will be a lot of things you can learn.