How long does it take to get blood work back to find out if u have cancer?

Depends on the type of cancer being tested for, where you got the blood drawn, and the results. If you are at a high risk they may rush it, or if they find something they may give you the results sooner. Anywhere from 2 days to 2 weeks.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.