They say it takes four weeks for you to notice your body changing, eight weeks for your friends to notice and 12 weeks for the rest of the world to notice. Well luckily for us, the World Health Store's annual 12-Week Challenge is just around the corner, and it's not too late to sign up. Registration closes this Sunday (March 17)， so get your flab into gear and get ready to change your life.

Sign Up

Whether you want to lose weight or just tone up your body, this year's challenge will help you reach your goals. This year there are four titles up for grabs:

Mr. and Miss Amazing - Those who lose the most weight

Mr. and Miss Fit - Those who gain muscle and enhance their physique the most

You can download your application form on the official 12 Week Challenge website.

What do you get?

This year there are some serious cash prizes up for grabs. Two national champs (one male and one female) will win RMB10,000 in cold hard cash. All the other title winners will win RMB1,500 each. Plus there will be loads of other freebies given away by the sponsors throughout the challenge and on the final night.

Who's doing it?

Some of Beijing's best trainers, nutritionists, restaurants and gyms have signed on as sponsors to support you through the 12 weeks. Who's helping out this year? We've got Zachary Williams of Wellbeing Nourish, Jim Dawson of Body Awakening and the Muay Thai masters at Glee Gym, just to name a few.

To find out all the deals and discounts they'll be dishing up, check the official 12-Week Challenge website.