Before starting any kind of weight lifting exercise you should do a general
entire body warm up. You may want do something like the treadmill or some kind
of aerobics/cardio exercise, just something for a few minutes to get your blood
flowing through all areas of the body. Then some stretch exercises to loosen up
the muscles your going to work. Now youre ready to move on.
Warm up exercise: Prepare for the heavy weights. This alone can save you
from serious injury to the body, hence, no muscle building progress. You should
always do warm up sets of and before the exercise you are going to perform.
Some things to think about: