What is the result of converting 1.6 meters to millimeters

There are 1000 millimeters in a meter so you have to multiply 1.6 by 1000. 
1.6×1000
=1600 millimeters

so the answer is 1600 millimeters. 
hope it helps

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.