While weight workouts may not be as effective as cardio (as mentioned below), they do however protect your lean tissue from being digested. Losing muscle mass during weight loss is inevitable to some degree, and should be avioded as much as possible. This is because muscles elevate your metabolism, the more you have the more calories you burn even while you are asleep. So one should not under estimate resistance training for weight loss.
In regards to cardio, you do not need to do over 45 minutes specifically (though there is nothing wrong with it). A 20 minute cardio is plenty for heart health, and beyond that its just about buring calories. Any amount is a good amount. Moreover, the intesity should not be extremely high. It should be at a steady pace and you should be able to carry out a conversation during.
The diet is crucial of course. Try to learn to eat every 3-4 hours or so. Limit your intake of saturated fats, keep carbs moderate and mainly earlier in the day, and stick to good wholesome non processed foods. Stay away from empty calories from junk, stuff with sugar added, etc. Base your meals around a good lean protein source (e.g. chicken, tuna, egg whites, turkey, very lean beef, etc.).
Finally, make sure you intake a small regular amount of good fats, and particularly omega 3 (from oily fish, walnuts, flax oil/ seeds, dark leafy vegetables, etc.). This is important for your health and also for weight loss.
pinkpolkadots answered Monday July 7 2008, 11:13 pm: The best thing you can do is lots and lots of cardio. It burns fat faster than weight lifting anyway.
You will build SOME muscle, but probably not a lot and it'll be long and lean instead of the bulky noticeable type.
The elliptical is GREAT for cardio but my trainer said that if you're not going for 45 minutes or longer and if you're not working up a sweat the entire time you're doing it, then it's not doing much at all for you. Anyway it's low impact too so you wont get like sore knees or anything like you might with just running.
Also, make sure you're eating really healthy. Like all natural, good for you type foods. And I've found that if about a half hour before I'm actually going to eat my meal, if I eat a low calorie snack, like a low fat string cheese (35 calories), then by the time I actually eat, I end up eating a lot less because the snack took the edge off my hunger. But you have to make sure everything you eat is healthy, it's not just about how much you eat, it's also about what you're eating.
And diet plays as much of a role (if not more) in losing weight as exercise does.
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