Antonio Martinez didn't think his former desk job was physically challenging enough, so he started working part time for Instacart. Weighing in at more than 500 pounds, strolling down the aisles and constantly climbing stairs to make deliveries would start him on the right track. However, it would be a simple question he asked one of his customers that would change his entire life. InsideEdition.com's Stephanie Officer explains how Martinez maintains his new physique.
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