Walking on Balls of the Feet (image) University of Utah Caption A University of Utah student walks by placing the ball of his foot down first while the heel is somewhat elevated. Humans normally do not walk that way because it requires 53 percent more energy than walking heel-first, according to a new University of Utah study. Images like this were used during analysis of study results. Credit David Carrier, University of Utah. Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.