Haven't been on your best behavior? Here's how to hide your tracks.

Sometimes, you have a piece of information you don't want anyone to see.

Like the fact that you had a few too many desserts last week. Or that you've been slacking off at the gym.

Not to worry--you can destroy all the evidence (and quickly) with Shreadmill. Created by Equinox trainer Felix Montano, this technique relies on a pattern of high-intensity intervals--all done on the treadmill--to raise your heart rate, tone muscles and blast excess jiggle in a short period.

The idea behind Shreadmill is to change the treadmill's speed and incline every 90 seconds to 2 minutes so that you are alternating between 65% and 85-95% of your maximum heart rate (psst...if you don't have a heart rate monitor, 85-95% means you're out of breath and having difficulty talking).

Ready to get shreading? Take a class at a participating Equinox, experiment at your own pace, or follow Felix's instructions here.

And don't worry--your secret will be safe with us.