Remember I posted on the Pollyanna phenonemon (really you must concentrate or you'll never keep up, go and look for it using the search function!)

Here is a practical example of the Pollyanna principal in action. Researchers have found that women who exercise in front of a mirror, as is so common in gyms, actually feel worse about themselves at the end of the session than if they exercise without being able to see themselves. This is particularly applicable to women who are unfit and trying to get fit.

Being forced to confront the reality of how you look and how unco-ordinated you are for a whole hour is pretty damn depressing. Much better to live under the illusion that you didn't look too bad. It will keep you coming back.

If you want to read more click here.