Have fitness questions? Fitz has your answers. 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 one per week to publish on That's Fit! Learn more about Fitz here.

Q. Hi Fitz. I keep hearing both you and other people say I should do push-ups, but I'm a small woman and don't want to bulk up. Push-ups are hard, so should I do them if I want to stay toned yet trim? Alyssa

A. Great question, Alyssa! This common question is on the mind of many women, and I'm happy to give this answer as many times as there are women who need to hear it. What you need to know is that it requires extraordinary effort for most women to put on any sort of bulky muscle. That means: protein shakes, supplements and insane amounts of heavy lifting. Of course, there are a few rare women here and there who pack on muscle quickly, but if you're already telling me you are small ... you are not one of those rare women.

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Eight short years ago, Marion Jones was the pride of the US -- raking in medals at the Sydney Olympics. Then things fell apart when it was revealed that Jones took performance-enhancing drugs. She was stripped of her medals and was sentenced to time in prison for lying to federal prosecutors. In her first interview since her release, Jones spoke to Oprah about what really happened.

According to Jones, her former coach, Trevor Graham, gave her pills he described as flax seed oil. Jones, who took numerous substances such as vitamins and creatine, didn't question what he was giving her. Jones said she was instructed to put the tablet under her tongue for a while and then swallow it. Later, during the investigation, prosecutors showed Jones a vial of a designer steroid nicknamed "the clear." Jones now admits that she recognized it immediately as the substance her coach had given her. "I made the decision I was going to lie and try to cover it up," explained Jones. "I knew that all of my performances would be questioned."

There's a lesson for all athletes here. From the average Joe to the high school quarterback to elite athletes -- we're all responsible for what we put into our bodies. Supplements such as whey protein and creatine are frequently used by athletes. But even legal supplements shouldn't be used without knowledge and caution. Proper nutrition, consistent exercise, and appropriate training are your best bets for keeping your body in peak condition.

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Think steroid-user and what's the first image that pops into your head? Probably some kind of athlete looking to get an edge over the competition right? But according to a recent survey of over 2,000 confessed steriod users the majority are not professional athletes, they're simply guys looking for better personal results in the gym.

Now it seems these steroid-using "gym rats" are more responsible about it than some other groups (the majority are aware of potential side-effects and get blood work done regularly), but it's important to realize that using steroids without a doctor's prescription is not a good idea. Hopefully having a better idea of who the biggest steroid-using group is will help experts better educate and reduce harmful side-effects.

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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. Hey Fitz, I have a question. How come Hollywood celebrities lose weight with such ease? There has to be some secret. I can't figure out why Renee Zellweger can gain and lose 20 pounds with ease, yet I can't get eight pounds off once! What's the deal? Elaine.

A. Good question Elaine. It does seem easy for the celebs to shed pounds quickly doesn't it? I can tell you for the most part, that besides the few that are blessed with oddly high metabolisms......the other popular hot bodies stay hot due to discipline and hard work..

Celebs do have certain benefits that make their efforts easier. First, they have budgets that can afford them personal trainers and chefs. Having a team of fitness professionals to guide and harass you would make one more likely to stick with a healthy eating and workout plan. Second. They have extra motivation to stay in great shape knowing their next job relies heavily upon their appearance. Imagine if you had to maintain a certain weight to keep your job! It may be half great and half crappie, but if you wanted to work ... you'd probably maintain your ideal weight.

Besides the benefits of celebrity and wealth, the bodies don't stay 'hot' without the same old fashioned exercise and conscious eating habits that I recommend to you non-celebs. The "Rich and Famous" may have trainers standing over their shoulders, but they still have to put in hours on the treadmill and do endless amounts of squats, push-ups crunches. Chefs may provide perfect meals, but the celebs still need to avoid the ice cream shops, candy, and fast food.

It's easy to feel inadequate and frustrated in a society where most of the folks we see on screens and in magazines are physically fabulous.Since you seem interested in celebrities, I encourage you to accept your different roles in life and try to find someone you can be inspired by. Pick a person with a similar body type and find an article on their fitness habits. Maybe you can learn from the advice given to them by their celebrity fitness staff! Fitz

Q. What's up Fitz? I see Matthew McConaughey splashed all over the magazines and that guy is definitely ripped. I think he's on steroids though. What do you think? Jason

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A new survey states that kids (defined as "adolescents") are now using muscle-building steroids at an earlier age than in the past -- but thankfully, most stop using these drugs as they grow older.

According the the study, steroid usage peaked at 5% at ages as early as middle school for many kids, and then declined after that point (in general).

The study, which looked at over 2,500 students, concluded that 1 to 3 out of every 100 adolescents surveyed still reported using steroids within the last year. Wow -- that's 33% of students in the survey with steroid use in the last calendar year. Nothing beats buff I guess -- not even personal health.

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Well, not really, but a new finding reveals that it can kill brain cells. This helps identify why some athletes are prone to "roid rage" when the substance is abused. What is really interesting is that when the body has too much testosterone, cells tend to "self-destruct" much in the same way that Alzheimer's patient cell's do.

The researchers explain that this may be the reason why so many gym aficionados on steroids tend to have wide mood swings and anger bouts. Long-term damage is being done to the brain cells due to excess in testosterone. They also tried the same thing with estrogen, but the results were quite different. Apparently estrogen is almost protective and there was less cell death.

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