Have fitness questions? Fitz has your answer. Our ThatsFit.com fitness expert -- and now your own virtual personal trainer -- will help you get fit, increase your overall health and do it in a fun way. Drop your questions here in the Comments section below and we'll choose two per week to publish on That's Fit! Learn more about Fitz here.

Q. Ms. Fitzness, I stopped smoking five months ago and have put on about 1.5 stones (21 pounds)! When is the best time to try and diet? I don't want to try and do too many things at once. I exercise regularly as I have my own horse and am always out and about. Thanks in advance, Lisa

A. Hey Lisa. Congratulations on your success getting rid of smoking! Smoking is one of the absolute worst things one can do to themselves, and your decision to quit is one of the best. Hooray! I'm literally doing a little 'happy dance' here at my laptop for you.

Now for your question about when you should begin dieting. Easy answer. NEVER! Never diet, lady! Diets are temporary behavioral changes that only lead to temporary results. Screw that! You are in this for the long term, sister, and no diet can last forever. What to do then? Gradually become more and more deliberate about what you put in your mouth. Seek out low fat, low calorie, high nutrition type food. Before you decide on any meal or snack, ask your self which would be the healthiest choice. Trade french fries for a baked sweet potato. Choose grilled poultry or fish over hamburgers. Find some calorie free beverages you enjoy as well.

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Bear Grylls (at right) used to be a more cuddly bear. The athletic star of Discovery Channel's Man vs. Wild recently revealed to me that he used to be quite overweight. After completing his service to the British Special Forces and getting married, Bear gained two and half stone! Not familiar with stones? Well, each of the British survival expert's extra stones equal a whopping 14 pounds! That's quite a lot. 35 pounds to be exact.

Bear is ripped now. How did he make the transformation? He decided to! Bear says that he just was sick of being a loaf and changed his ways. He also was suffering from back pain. (He broke his back during a free-falling parachuting accident). To stay in shape for his adventures and remain pain free, Bear trains three hours a day. He varies his workouts with: martial arts, running, climbing, yoga, swimming, pull-ups, push-ups and more. When he's not eating all sorts of disgusting live and dead animals to demonstrate survival skills, Bear avoids meat and dairy. He feasts on fruits, veggies, and whole grains.

The guy knows what it's like to be out of shape, and has decided that's not the way he wants his life to be. His training is not 'easy' for him, but it's something he feels passionate about. Bear is not chubby at all anymore. In fact, his ripped. What a lucky lady his wife is to get to cuddle up with that Bear.

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