Good thread.
Higher intensity workouts are better than low for weight loss - unless you are unable to maintain a high intensity work out for very long. Here is a great article explaining this:
http://www.prevention.com/article/0,...4219-1,00.html
The gist of this article is: "It's true that the body burns a higher percentage of calories from fat during more mellow exercise like walking and easy cycling. But, when you pick up the pace for a higher-intensity cardio workout, you burn a greater number of overall calories (which should be your focus for weight loss) and subsequently just as much total fat."
Also, building muscle allows the body to burn more calories, even at rest. When lifting weights you should "max out" the muscle. That means using a weight that you can only lift for 8-15 reps before the muscle is fatigued. This is what breaks down the muscle. Resting is how it repairs itself and therefore gets stronger. So it is very important not to lift on consecutive days. This will also allow you to spend less time in the gym - no more doing endless reps that really aren't doing much other than increasing muscle endurance....unless that is your goal. If weight loss is the goal then more weight, less reps. LBTC is correct - the larger the muscle group being used the more calories being burned. Be careful though...you don't want to start out lifting more than your connective tissue can handle. This could result in injury.
As we must account for every idle word, so must we account for every idle silence." ~Benjamin Franklin