Working through a warmup
Backing music – do you want it or need it?
Obviously, it is not vital to use a backing track for your warmup. It's just a little series of things that you do to get ready to play and you can do them just fine with no backing. Experienced musicians who are warming up before practice or a concert will probably not have a backing.
On the other hand, I always use warmup backings in our lessons at school, and I recommend that you do too, as far as possible. Why? What's it all about?