If you haven’t taken the free Real Age online questionnaire about your health, you might want to. The in-depth test takes 10 minutes or so and asks about everything from your flossing habits to your exercise routines to your consumption of whole grains. At test’s end you’ll get your “real age” number––which might be more or less than your chronological one, depending on how many vegetables you eat and your family history and so on. It’s fascinating. Oprah is a fan.

This will prepare you for a new book from the Real Age wizard, Michael F. Roizen, M.D., who’s written or co-written RealAge, The RealAge Makeover, and YOU: The Owner’s Manual, among others. In his newest tome (out April 1), The RealAge Workout: Maximum Health, Minimum Work, Roizen, an internist and anesthesiologist, helps you evaluate your fitness picture and gives you tips and routines based on your age, genetics, and lifestyle. As the title promises, Roizen offers the bare minimum to get and keep you going. He also offers tips on the basics of weight-training and charts to calculate “the RealAge effect––the number of biological years younger you become with each change you make,” according to Amazon’s description. This is all a part of the latest fitness trend in personalized everything; people are tired of finding out that one size definitely does not fit all when it comes to health.

Once you’ve ratcheted your own age down by ten or even 29 years––is it possible to be healthier than a newborn?––you can turn to the Real Age franchise for your canine. In DogAge: How Young Is Your Dog? by Dondi S. Dahlgaard, you can forget that “times seven” approach and calculate your pup’s true age with a similar test (though there’s presumably nothing on flossing). There are also tips on dog care, safety, and anatomy.