I have received thousands of e-mails from athletes- bodybuilders- and working people asking this question.

First of all it depends on your type of workout you will doing and also on your
individual body type.

That being said you need to follow some general guidelines

1) The best warmup for lifting weights is to do the exercises you are about to do
with a light weight and go through the full range of motion. That will warmup your
body muscles that you are just about to use. DO NOT GO YOUR HEAVIEST WEIGHT ON YOUR FIRST OR SECOND SET UNLESS YOU WANT TO GET INJURED!

2) Do not go to do a long aerobic workout before you lift weights. You can often burn
up the glycogen from your muscles before you even workout a that will give you a
worthless workout. You need the glycogen to help you lift and get results.

3) I am going to put my warmup routines in my online magazine this week for you to
see and also my cool down routines. But one thing you need to do is to get your
body temperature up some before you start. Whether that is done on the treadmill or some quick light weights it does not matter as long as you have got your blood pumping.