EDMONTON, Alberta, Sept. 17 (UPI) -- Canadian and U.S. researchers say there is a direct correlation between the length of fingers and being motivated to hit the gym.
Researchers at the University of Alberta and University of California-Riverside, who conducted a study using 1,000 white mice, said the findings seem to support a stronger connection between digit length, voluntary exercise and high levels of prenatal stress hormones -- indicated by the difference in activity level between the control mice and the selectively bred, active mice.
The study, published in the journal PLoS ONE, suggests prenatal stress, rather than prenatal testosterone levels in the womb, forms a component of the inherent desire for physical activity.
"The research shows a link, or relationship, between the brain, behavior and personality traits and the shape of the hand," lead researcher Peter Hurd of the University of Alberta said in a statement. "It opens the door to the notion that aspects of one's personality, in this case the desire to exercise, are fixed very early in life