According to a recent study by Harvard psychologist Ellen Langer, it might be possible to trick our bodies into thinking we are younger…

[NEWSWEEK] Langer did a study like this with a group of elderly men some years ago, retrofitting an isolated old New England hotel so that every visible sign said it was 20 years earlier. The men—in their late 70s and early 80s—were told not to reminisce about the past, but to actually act as if they had traveled back in time. The idea was to see if changing the men’s mindset about their own age might lead to actual changes in health and fitness.

Langer’s findings were stunning: After just one week, the men in the experimental group (compared with controls of the same age) had more joint flexibility, increased dexterity and less arthritis in their hands. Their mental acuity had risen measurably, and they had improved gait and posture. Outsiders who were shown the men’s photographs judged them to be significantly younger than the controls. In other words, the aging process had in some measure been reversed.

This is AMAZING. I’m going to put this into work RIGHT NOW. But wait. I can’t decide how old I want to be? What’s the optimal age for a thirty-something woman to trick herself into believing?  28? 21? 16???