Nutrition & Dieting/Calories & Fat

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Question
I have a very large list of basic questions I'd like to rattle off to you, but do not want to run the risk of you not answering any of them so below I only listed a few.

What exactly are calories in unscientific terms?

How do calories differ from fat?

What are "calories from fat?"

Do people actually gain fat from doing cardio?

Is there a good simple diet for someone that wants to lose 20 pounds or so without starving? I'm 213lbs and 5' 11" and I guess I am now over-weight. I go to the gym 4 days a week and try to burn 500 calories each time on cardio plus machine exercises.

Is it reasonable to lose no less than 3 lbs a week?

Answer
Hi James
Yes indeed, those are a lot of q's you have asked me, and it would take more time than here in this simple response to answer all your q's thoroughly.  I want you to have a good understanding of all of this, and it sounds like you need to get down the "basics" of diet, exercise at the beginner level.  I'm going to recommend a FANTATIC website that has all the q's you have asked me, and a lot more.  In fact, after browsing through, you can come up with your own diet/exercise plan, and satisfy your curiosity with your health-related q's.
Have fun with the website, and congrats on making a healthy decision!  

http://www.lifeclinic.com/focus/nutrition/

Nutrition & Dieting

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Crystal Fawn PA-C Physician Assistant

Expertise

You can be assured that I can answer 95% of your nutrition & dieting questions related to medical conditions (ie. Is the South Beach diet safe if I have renal disease?), fitness modelling industry (I have had several top 3 finishes in world & international natural fitness & figure competitions), real-life applications of nutrition/exercise (ie. A practical approach for busy professionals who want to get toned & fit!), personal issues (eating disorders, psychological barriers, motivation issues), obesity & preventative nutrition (treating & reversing obesity, problems of obesity, how to prevent major health problems through proper nutrition/exercise). Since I am a physician assistant, I am able to provide a diagnosis.

Experience

Physician Assistant (diagnose & treat diseases/symptoms), natural (drug-free) fitness & figure competitor in national & international competitions, fitness model for print, internet & audio publications, former competitve figure skater for almost 10 yrs, weight training for over 10 yrs

Organizations
AAPA (American Academy of Physician Assistant) Phi Theta Kappa Honors Society Alumni

Publications
Fitness & Sports Network

Education/Credentials
Physician Assistant PA-C Florida: graduated Suma Cum Laude HBA Psychology Degree-Magna Cum Laude

Awards and Honors
Graduated Suma Cum Laude in Physician Assistant Program, and graduated with highest GPA Graduated Magna Cum Laude in HBA Psychology Degree Phi Theta Kappa Alumni Member (high GPA honors) volunteer work at Baptist Hospital, Miami, Florida

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