Have you heard of palm reading? Who knows if that's real or not... but researchers seem to be finding a lot of telling information from a surprising source: The length of fingers.

First, Jacki told us how the length of your ring finger can affect your arthritis risk, now researchers are saying that the ratio between your digit (second) finger and ring (fourth) finger may be related to your desire to exercise.

The study, conducted by American and Canadian researchers, compared the activity levels of normal mice and selectively bred mice. The more active mice showed a difference in finger length.