That's Fit

Are there 100 calories in 18 Fat Free Rold Gold Tiny Twist Pretzels or in 25? If you picked 18, you are correct. How about two dark chocolate kisses or five dark chocolate kisses -- which serving has 100 calories? Good news: You can have five kisses for 100 calories.

Women's Health magazine puts readers to the 100-calorie test with this online questionnaire. Even better than my two previous questions, this survey features photos of various foods in their competing serving sizes and asks you to pick the 100-calorie portion.

Shrimp and cocktail sauce, peanuts and dried cranberries, baby carrots and hummus, bagel and doughnut portions, even McDonald's French fries are a few of the foods that make an appearance in this quiz. It's sure to help you fine-tune your snack smarts. So get started. And best wishes for a stellar test score.

Despite the glaring fact that obesity, unhealthy diets, and an overall lack of exercise pose quite a threat to our nation, we are making some pretty good health advances -- healthy eating is on the rise, smoking is on the decline, and medical progress is clearly evident.

Now, more than ever, it's actually possible to make it to the ripe old age of 100. I'm not sure if I personally want to reach this number but for those who do, here's one take on what you've got to do.

Go Mediterranean

A Mediterranean diet is the best for healthy aging and disease prevention.

Read the Paper

Keeping up with current events can extend your life.

Reproduce

Having kids, especially if you're a woman, can help you live longer.

Drink! Drink!

Certain beverages tend to lower the rates of death from cardiovascular disease and other causes.

Slim Down

Obese 100-year-olds just don't exist.

Get Married

Married people live longer than singles.

Have Faith

You can expect to live longer if you have some kind of regular religious practice or belief.

Head to the Country

Avoid the city and long you will live.

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. Dear Fitz. My high school offers very few sports, but I'd like to play something. I'd like to try out for football, but my old-fashioned mother thinks that will make me a "tomboy". What do you think? Katie

A. You've come to the right place Katie! I happen to have embedded myself in the traditionally male sport of full-contact kickboxing, and you know what? It made me a better woman! Sports are sports. Whether you play with a ball, racket, gloves or sneakers...sports are just a more fun way to exercise and flex your competitive muscles. Period.

I loved getting in the ring to try and knock an opponent out. I loved the strategy, speed, and power of the event. Fighting, in fact, is one of my favorite things to do. Some of the girls I've competed against thought they had to take on some sort of macho persona. Short hair, yucky jeans, and mean snarls. I, on the other hand, preferred to act like a monster in the ring and show up to the after-party like a lady in a pretty dress and heels. Embracing my athleticism, strength and courage has allowed me to appreciate how wonderful it is to be a woman. A strong, athletic, educated woman who loves to have the doors held for her.

You've seen them, 100-calorie packs of Chips Ahoy cookies, Doritos, Cheez-It crackers, and more. These slimmed-down versions of tasty treats with their health conscious labels are tempting, aren't they? They always catch my eye in the grocery store. Are they worth it, though?

The goods packaged in these mini bags and containers are definitely miniaturized. But the devilish ingredients, including trace amounts of trans fat and hydrogenated oils, are still there. And for those whose cravings get the best of them, one minimized portion of Oreo cookies-- which is certainly better than a big one -- may not be enough. Ever ripped open two or three 100-calorie packs to satisfy your needs? Beware of the possibility.

It's best to stray from the 100-calorie packs and head straight for the fruits, veggies, nuts, and whole grains. One hundred calories may not be a lot, but empty ones tend to be a lot more trouble than they're worth.

Do you like those little 100 calorie snack packs all conveniently pre-portioned into single servings? They don't do much for me (I always want more than just one!) but lots of people love them -- so many it has become a $20 million dollar plus per year industry.

Food companies make more money off those snack packs than you might as expect -- as much as 20% more than traditional packages. And although they do make portion control a "no brainer" and they save time (both of which are valuable to people these days) what do you think? Is it worth it to you to pay that much extra or are we all getting ripped off?

How much do you know about healthy living, really? How you age through life has so much to do with some of the things we all take for granted, like how much sleep we get and at what age we decide to retire. Some things may even be the exact opposite of what you'd first guess, like eating sweets for one: good or bad?

You should pop over to Prevention and take this quiz, it's only 10 questions so it doesn't take long. I won't give up my score, but let's just say I did a lot worse than I thought I would! The questions are strictly true/false, so I'm blaming some of my wrong answers on possible "gray areas." Ha.

What is the secret to a long life? It's something humans have been trying to figure out ever since we started counting years. Maybe it has something to do with geography. Or what about those cold showers? Whatever the case may be, it seems like there are a million different ways to live to 100.

Here's another radical theory to explain why people live longer than others. University of Chicago researchers have found that it could all boil down to the age at which your mother gave birth! Apparently if your mom had you before age 25, you are twice as likely to live for 100 years.

A bold claim indeed! Luckily for the rest of us, exercise and healthy eating can offset that birthed advantage that our other siblings may have. But a more plausible fact coming out of the article suggests that women could be up to five times more likely to reach that centenarian mark than us men.