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"We tested the RPE (rate of perceived exertion), which is basically how hard one is working; and oxygen consumption, how much oxygen you take in vs. being at rest; and caloric expenditure, and we found no significant difference between any of the shoes," said Stephanie Tepper, a member of the Wisconsin La Crosse research team. "So the toning shoes definitely don't do more than the regular running shoe."
Based on the data compiled by his team, Porcari advises against buying toning shoes based on the belief that they are going to sculpt your lower body or burn extra calories.
"That's absolutely wrong," he said.
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