Understanding Weight Loss: Common Questions & Concerns

Question
Could you give further comment - what is wrong with wheat and rye flours? I am guessing that means white breads. Really!? 72 hours for aerobics? Still at 3 minutes. But given time I can do better... Something else I have learned. Do NOT exercise for even 1 day, and I feel bad. Sort of like nauseated.
Thanks for the help. My goal is 75 pounds of weight loss.

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Followup To
Question -
I am doing daily weightlifting and aerobics to loose weight. I am loosing 1-2 pounds per month of weight. What I do not understand is exactly how loosing weight works. I read: increase your heart rate to 20 beats per 10 seconds for weight loss, i.e. aerobic exercises, but how would THAT make you loose weight? Other suggestions, that make more sense to me; lift weights, heavy, often, to make your body DEMAND energy; available, and stored, to make muscle movement possible. I read that THIS WAY works better than aerobics. Combination of both probably will give the best results, or should I concentrate on 1 only. My body does weightlifting very well, I get my heart rate up to 20 beats per 10 seconds, but does NOT do aerobics well. I get really tired after only 1-3 minutes of aerobics. I can do weightlifting for 15-30 minutes with little fatigue or pain afterwards.

Answer -
Actually the aerobic exercise raises the metabolic rate for 72 hours while the weight lifting tones and builds muscle and burns calories to do that, so you really need both. But if you had a choice cutting out all wheat and rye and their flours plus 30 minutes of aerobic activity daily would create an amazingly healthy body but you would need at least light weighs for muscle developement and definition. The muscle activity except for aerobic does not improve health except for the actual calories it burns. OK?

Answer
Could you give further comment - what is wrong with wheat and rye flours? I am guessing that means white breads.
Actually it is the gluten in the wheat, rye, barley and their flours which create the metabolic problems of the metabolic syndrome X. see:
http://www.nlm.nih.gov/medlineplus/metabolicsyndromex.html

72 hours for aerobics?
Yes, from basic aerobic versus anaerobic physiology

Still at 3 minutes. But given time I can do better... Something else I have learned. Do NOT exercise for even 1 day, and I feel bad. Sort of like nauseated.
Yes, it can be that you are having endorphin withdrawal, see
http://www.niams.nih.gov/hi/topics/arthritis/arthexfs.htm