Re: Im trying to lose weight...
Showing your abs means (a) having some muscle development there, and (more importantly) (b) getting to a low enough body fat percentage (typically under 10%). Few men have that low a body fat percentage, so if showing your abs is your primary goal, you have to be very dedicated at cutting the body fat (and that gets harder the lower you get).
You may want to consider adding weight training of your large muscles like back (e.g. pullups, rows), chest (e.g. pushups, dips, bench press), upper legs (e.g. squats) in order to make them stronger. Although be aware that as you get more fit and less fat, losing fat while gaining muscle becomes much more difficult, which is why those with good physical fitness sometimes alternate periods of cutting (losing mostly fat) and bulking (gaining mostly muscle), both of which take dedication (it is easy to lose muscle and gain fat), though different types of eating and exercise.
As far as running or any cardio exercise goes, the higher the intensity, the more calories you burn for a given amount of time. However, if you go at a very high intensity (anaerobic), you can only go for short sprints. Some people intentionally do that in intervals (high intensity interval training). But if you plan to have a long run, you need to stay at aerobic intensity.
Last edited by tjlhb; 05-21-2009 at 11:46 PM.